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PCB Assembly manufacturer High Quality & Fast Delivery
星期一, 9 9 月, 2024

What is pcba?

PCBA is the abbreviation of Printed Circuit Board Assembly, which means “circuit board assembly” or “circuit board assembly”. ‌It refers to installing electronic components on a printed circuit board and connecting the components to the circuit board through welding and other methods to form a complete circuit system.

This process involves multiple important links, including SMT (surface mount technology) mounting, DIP (dual in-line package) plug-in, etc., which eventually form a key component of electronic products. PCBA is not only the physical support of electronic equipment, but also provides a way to connect circuits, and also plays a role in protecting components and dissipating heat. In the manufacturing process of electronic products, the production process of PCBA includes steps such as PCB design, manufacturing, component placement, welding and testing to ensure the functionality and reliability of the product.

What does pcba stand for in electronics

PCBA stands for Printed Circuit Board Assembly in electronic products‌. PCBA is the process of assembling and soldering electronic components on a printed circuit board to form a complete circuit board. It is an important part of modern electronic products, including mobile phones, computers, cars, home appliances, etc.

. PCBA processing involves several important links, such as SMT (surface mount technology) and DIP (dual in-line package) plug-ins, which ensure the correct placement of electronic components and the reliability of the circuit. In addition, the use of PCBA processing equipment and the improvement of manufacturing processes, such as printers and dispensing machines, have improved the yield and efficiency of PCBA processing products‌

What is pcba manufacturing

The manufacturing process of PCB (printed circuit board) involves multiple process links, including design, plate making, drilling, filling, electroplating, etc. These steps together constitute the manufacturing process of PCB.

  1. Design: First, according to the needs and layout design of the circuit, the circuit diagram is drawn using computer-aided design (CAD) software. This stage is very critical because it directly determines the function and performance of the PCB.
  2. Plate making: After the design is completed, the designed circuit diagram needs to be converted into a practical PCB board that can be made. This usually involves the use of photosensitive materials and special chemical treatments so that the circuit pattern can be accurately transferred to the PCB substrate.
  3. Drilling: After the plate making is completed, holes need to be drilled on the substrate according to the designed circuit pattern. These holes are used for subsequent wiring connections. The precision and accuracy of drilling are essential to ensure the normal operation of the circuit.
  4. Filling: After drilling, some substances, such as resin, need to be filled in the hole to enhance the structural strength and electrical insulation performance of the PCB.
  5. ‌Electroplated‌: In order to ensure good electrical connection, the PCB needs to be electroplated, usually by electroplating a layer of copper or other conductive materials on the copper foil. This step is very important to ensure the conductivity and durability of the circuit.
  6. ‌Lamination and cutting‌: After the electroplating is completed, the multi-layer circuit boards are laminated together to form a multi-layer PCB. Subsequently, the PCB boards are cut into specific sizes as needed.
  7. Inspection and testing‌: The manufactured PCB is inspected and tested to ensure that its functions and performance meet the design requirements. This may include visual inspection, functional testing and other methods.
  8. ‌Finished product assembly‌: The qualified PCBA board is assembled into the shell

‌What is the SMT process in PCBA?

‌1. Programming and adjusting the SMT machine‌: According to the information provided by the customer, program the coordinates of the location of the SMT components and perform the first piece check.

2. Printing solder paste‌: Use a screen printer to print the solder paste on the pads on the PCB board where the electronic components need to be soldered.

3. SPI inspection‌: Use a solder paste detector to detect the quality of solder paste printing to ensure that there are no defects.

4. SMT‌: Use a SMT machine to accurately install the electronic components SMD to the fixed position of the PCB.

‌5. High-temperature solder paste melting‌: The solder paste is melted at high temperature through a reflow oven to firmly solder the electronic components SMD and the PCB board together.

6. AOI inspection‌: Use an automatic optical inspection instrument to detect whether the PCBA components after welding have poor welding.

7. Visual inspection‌: Manual inspection checks the version of the PCBA, whether the direction of the components is correct, and the defects after welding.

8. Packaging‌: The qualified products are separated and packaged. The packaging materials used include anti-static bubble bags, static cotton, blister trays, etc.

PCB Assembly manufacturer High Quality & Fast Delivery

Best Technology is a PCB assembly manufacturer in Asia, who specializes in printed circuit board assembly (PCBA) and manufacturing. We have our own PCBA factory with 8 SMT lines, each line equipped with full-automated manufacturing and testing machine. In our PCBA factory, you can see dual-online AOI, SPI, X-RAY, nitrogen reflow oevn and so on. We are certified by ISO9001, ISO13485, and IATF16949, ensuring the highest quality standards in every PCB project.

Full turnkey service from pcb design, pcb manufacturing, component sourcing, pcb assembly, pcb duplicating in a very short time.

We source all the parts directly from the manufacturers or from authorized distributors such as Digikey, Mouser,Future,TTI,Avnet and Arrow to avoid counterfeit parts.

We also warehouse a significant inventory of common parts.If we cannot source a specific component, our engineers will make recommendations for fair-price alternatives.

What is pcba test

‌‌PCBA testing‌ is the process of testing the electrical conductivity and input-output values ​​of the PCBA circuit board with mounted electronic components to ensure that all the installed circuit boards are completely consistent with the various specifications and parameters of the design. Through strict testing, the performance and reliability of the PCBA board can be improved, customer trust can be won, and cooperation between enterprises and customers can be promoted.

PCBA testing includes various test forms, such as ICT testing (internal circuit testing), FCT testing (functional testing), fatigue testing, extreme environment testing and aging testing.
ICT testing tests the characteristics of devices and circuit networks by applying test probes to the test points on the PCB.

FCT testing is mainly used to test the electronic and electrical functional aspects of the PCBA board, and is tested under the condition of simulating the actual operating state of the PCBA board. Fatigue testing performs high-frequency and long-term operations by sampling to observe whether failures occur.

Extreme environment testing places the PCBA board in harsh and extreme environments, such as high temperature, severe cold, and falling, to infer the reliability of the PCBA board. Aging testing is to power on the PCBA board and electronic products for a long time to observe whether any failures occur.

What is a pcba number

A combination of letters and numbers used to uniquely identify and track each electronic component on a circuit board. These numbers are often called component numbers, part numbers, or reference designators.

On PCBA boards, the format and meaning of these numbers may vary depending on the manufacturer and designer, but generally follow certain rules.

For example, common numbers are R107, C118, Q102, D202, etc., where:
The first letter usually identifies the type of device, such as: R for resistors, C for capacitors, D for diodes, Q for transistors, etc.
The subsequent digital part may indicate the circuit function number (such as “1” may indicate the motherboard circuit, “2” may indicate the power supply circuit, etc.) and the serial number of the device on the circuit board.

FAQ About PCBA

hat does poor welding include and what kind of faults will it cause?
Poor welding is manifested as incomplete solder joints, cold solder joints, etc., which lead to reduced conductivity of the circuit board or circuit failure. Solutions include optimizing soldering parameters, ensuring pad cleanliness, adjusting soldering energy, and increasing soldering temperature or extending soldering time.

What causes component misalignment?
It is caused by inaccurate positioning of components during the soldering process, affecting circuit connection and product function. Solutions include implementing precise visual inspection and automatic inspection to ensure that components are placed correctly and rework and repair.

What do short circuits and open circuits mean?
Short circuits and open circuits: caused by poor insulation or fracture between adjacent solder joints on the circuit board or between solder joints and lines, which may cause abnormal current flow or circuit interruption. Solutions include ensuring that solder paste is evenly applied, components are correctly placed, and adjusting soldering parameters to avoid excessive soldering temperature and pressure.

What causes solder cracking?
Solder cracking: cracking occurs during use or after a certain environmental stress, usually due to excessively high temperatures, long soldering time, or improper selection of soldering materials during the soldering process. Solutions include optimizing soldering parameters, ensuring proper soldering temperature and time, and selecting appropriate soldering materials.

Why electrostatic discharge?
‌Electrostatic discharge (ESD) damage: Sensitive electronic components can be damaged by ESD. Solutions include implementing ESD control measures in the production environment, such as using ESD gloves and anti-static workbenches.
Does voltage instability affect PCBA performance?
‌Power supply issues: Power supply stability issues can affect PCBA performance. Solutions include implementing power electronics technology and voltage regulators to ensure stable power supply.

what does pcba stand for

PCBA stands for Printed Circuit Board Assembly. Other synonyms of PCBA include “PCB Assembly”, “Populated PCB” and “Board Assembly”. These terms are widely used in the electronics industry to describe the finished or semi-finished state of a circuit board after component placement and soldering.‌

what is a pcba board

PCBA board, full name Printed Circuit Board Assembly, Chinese name is printed circuit board assembly, refers to the installation and welding of components on the completed printed circuit board to form a circuit board that can be used directly.

The production process of PCBA board mainly includes three steps: component mounting, welding and testing. First, the obtained components are accurately positioned and mounted on the PCB board according to the design requirements, and then the components are firmly fixed on the PCB board by welding, and the circuit is ensured to be unobstructed. Finally, the circuit is tested to verify whether it is working properly. The whole process requires a high degree of technology and precision to ensure the quality of PCBA board.

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USB interface: From Type-A to Type-C, which interface do you use most?
星期一, 2 9 月, 2024

What are USB Ports?

The USB end is a connection for connecting a consumer electronics device such as an accounting machine. USB’s general name is a universal skewer line. USB end support USB support for connection. If you have a USB connection, you can set up a number of numbers. In addition, a USB port is also available, as well as a power supply. This end is fully equipped with the power.

The USB calculation function has additional functions, and one small adjustment can be made alternately. Please contact us if you have any questions about USB. With the advancement of technology, the current functionality of the USB end is greatly enhanced. Because of this, this is a small change to the end of the road. USB is important for three major directions. In this regard, the dimensions are the external size, the number of speeds, the visual power of the power.

Usb connector types

Types of USB connectors: different types of connectors with different shapes and directions, USB connectors can be separated into different types:

Type-A port: This is the most common type of USB port, the shape is long and rectangular, and the support is heat-resistant. Computer equipment such as printing machine, keypad, mouse button, driving device, etc. Type-A interface has USB 2.0 and USB 3.0 in different editions, among which USB 3.0 has faster speed, color is usually blue, and USB 2.0 has slow speed, color is black.

Type-B contact: Type-B contact shape is round shape, demand-specific connection. For general use, external equipment such as audio equipment, viewing equipment, etc., such as a 3.5 inch movable screen, stamping machine, display device, etc.Type-B verbal usage scene is relatively small, so this is an unusual sight in daily life.

Type-C port: Type-C port is a new type of USB port that has emerged in recent years. Built-in USB 3.1, Type-C interface configuration, mainstream interface type, intelligent handheld computer, flat panel battery, notebook battery, etc. The biggest feature of the Type-C interface is its support and double-sided insertion, making it convenient and convenient to use.


Type-C interface support further improves the speed and power of the power, and provides more advanced usage experience. Previously, when I came here, I was confused as to how to get around the main machine.

Mini USB port Micro USB port

Mini USB port Micro USB port: There are many types of ports for transfer equipment, digital reading machine, digital image machine, metering equipment, etc. Mini USB port ratio Micro USB port size is small, also known as a USB port, Micro USB port is smaller, thinner, supports OTG function, and provides a number of additional power functions. The Micro USB port is convenient and easy to use, and has various types of portability.

What functions does USB have?

  1. Power Delivery of USB Ports
    Some USB cables can deliver power as well as transfer data, but most USB cables can do both. Power delivery of USB ports is mainly divided into three categories: fast charging, quick charging, and power only.
  2. USB Data Transfer Speed
    USBs come in various sizes and shapes. Also, USB types have multiple speed standards. It is important to know that some USB cables are designed for data transfer only, while some can only deliver power. However, some USB cables can serve both purposes at the same time. Therefore, it is necessary to verify the performance of the cable before purchasing it.
  3. USB Video Transfer
    The ability of USB ports to power devices and transfer data between devices is already impressive enough. However, you can decide to integrate USB-C to connect a monitor in place of a VGA cable or HDMI. In addition, USB-C also supports 4K video transmission.

What are the advantages of USB interface?

  1. Standard uniformity. The most common ones are hard disks with IDE interfaces, mouse and keyboards with serial ports, and printers and scanners with parallel ports. However, with USB, all these application peripherals can be connected to personal computers using the same standard. At this time, there are USB hard disks, USB mice, USB printers, etc.
  2. Easy to carry. Most USB devices are known for being “small, light, and thin”, which is very convenient for users to carry large amounts of data with them.
  3. Hot-swappable. That is, when users use external devices, they do not need to shut down and restart the computer, but directly plug in the USB when the computer is working.
  4. Multiple devices can be connected. USB often has multiple interfaces on personal computers, and several devices can be connected at the same time. If a USB HUB with four ports is connected, four USB devices can be connected, and so on. You can connect all the devices to a personal computer at the same time without any problems (up to 127 devices can be connected).

How Do USB Ports Work?

USB is an external bus standard used to regulate the connection and communication between computers and external devices. The USB interface has plug-and-play and hot-swap functions. The USB interface can connect 127 peripherals, such as mice and keyboards. USB was jointly launched by Intel and other companies in 1994 and has successfully replaced serial and parallel ports since 1996. It has become a must-have interface for computers and a large number of smart devices today. For most engineers, the main obstacles to developing USB2.0 interface products are: facing the complex USB2.0 protocol, writing USB device drivers by themselves, and being familiar with microcontroller programming.

Why USB Ports Are Replacing Serial Ports

USB has three major advantages. It is superior to serial ports in several aspects.

Speed
USB ports are able to transfer data at a much faster speed. They work ten times faster than regular parallel ports. Also, they are much faster than serial ports. On average, serial ports offer a data transfer rate of 150kbps. On the other hand, USB ports offer about 12 Mbps. The data transfer rate depends on the type of USB port. For example, USB 2.0 has a maximum data transfer rate of 480 Mbps.

Compatibility
USB ports have replaced serial ports in the past few years. Various industrial devices are equipped with serial ports. This replacement has brought problems. USB ports are generally compatible with most USB devices.

Durability
USB ports are more durable than serial ports. The tiny pins on a serial port can break or bend easily. Whereas USB ports are very sturdy.

Frequently Asked Questions

The USB interface cannot be used. It may be due to a problem with the system. You need to check whether the system service is disabled or reinstall the operating system.

‌BIOS setting problem‌. If USB is disabled in BIOS or CMOS, you need to restore it to the factory default settings.

‌USB driver is not installed or the driver is deleted‌. You need to install the USB universal driver.

‌The front USB cable is not connected properly‌. Try to insert the USB flash drive into the USB interface on the back of the chassis.

‌The USB interface voltage is insufficient. When the mobile hard disk is connected to the front USB interface, it may not be recognized due to insufficient voltage. You should use a hard disk box with an external power supply or replace the power supply.

‌Compatibility issues between the motherboard and the system‌. For example, the compatibility issues between the NF2 motherboard and USB require the installation of the latest dedicated USB2.0 driver and patch.

‌System or BIOS problem‌. When USB is disabled in the BIOS or operating system, you need to enable options related to USB devices.

‌Be careful when plugging and unplugging. Do not unplug during reading and writing, otherwise the chip may be burned.

‌If the USB device is frequently disconnected‌, it may be that the USB cable connection is unstable or there is a problem with the USB port. Try changing the cable or connecting to another USB port.

‌If the USB device cannot be recognized or charged‌, make sure the device is compatible and the cable is intact. Try connecting to another computer or updating the driver.

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What is an Amplifier Board? – Definition, Types, Uses
星期五, 30 8 月, 2024

What is an Amplifier Board?

An amplifier board is an electronic circuit designed to amplify audio signals. It takes a low-power input signal, such as the sound from a music player, and increases its strength to a level that can drive speakers or other audio output devices effectively. This amplification process ensures that the sound is louder and clearer when played through the speakers.

Amplifier boards are commonly used in various audio applications, including home theater systems, car audio setups, and professional sound equipment. They are essential for delivering high-quality audio performance, especially in environments where louder sound output is needed. Amplifier boards come in different types, each suited for specific applications, and are designed to handle various power levels and sound quality requirements.

What is an Amplifier Board? – Definition, Types, Uses

What Does an Amplifier Board Do?

An amplifier board serves the crucial function of boosting the power of audio signals. In any audio system, the original signal generated by a source, such as a smartphone, MP3 player, or microphone, is usually weak. This weak signal is insufficient to drive speakers or produce audible sound at a volume that is satisfactory. The amplifier board steps in to enhance this signal, increasing its power so that it can drive speakers effectively.

Beyond simply making the sound louder, a well-designed amplifier board ensures that the audio signal remains clear and free from distortion throughout the amplification process. This means that whether you’re listening to music, watching a movie, or using a public address system, the sound you hear is rich, clear, and true to the original input.

Amplifier boards are versatile and can be found in various settings, from home audio systems and portable Bluetooth speakers to car audio systems and professional sound equipment. Each of these applications demands different levels of power and sound quality, and amplifier boards are designed to meet these specific needs.

What is an Amplifier Board? – Definition, Types, Uses

Types of Amplifier Boards

  • Wiring Harness
  • 2 Channel Stereo Amp
  • Battery & Power
  • 1 Channel Mono Amp
  • 2.1 Channel Amp
  • Interface
  • Preamp
  • 4 Channel Amp
  • Bluetooth / Wi-Fi Receiver
  • Panels & Mounting Acc.
  • Panels & Mounting Acc.-Wiring Harness
  • 10 Channel Amp
  • 3 Channel Amp
  • 6 Channel Amp

What Is the Function of the Amplifier?

The primary function of an amplifier is to increase the amplitude of an audio signal, making it strong enough to drive loudspeakers and other audio output devices. An amplifier takes in a low-power audio signal, processes it, and outputs a much stronger signal without significantly altering the original sound’s characteristics.

This function is crucial in ensuring that the sound produced by the speakers is loud enough to fill a room, stadium, or outdoor space, depending on the application. For example, in a home theater system, the amplifier ensures that the dialogue, music, and sound effects are all heard clearly, even during quieter scenes or moments of intense action.

In addition to boosting the signal, amplifiers often have other functions, such as controlling volume, adjusting equalization (bass, treble, midrange), and managing different audio inputs. This makes the amplifier a central component in any audio system, responsible for not just increasing volume but also enhancing overall sound quality.

What Kind of Amplifier Do I Need for Speakers?

Choosing the right amplifier for your speakers involves considering several factors, including the power rating of the speakers, their impedance, and the environment in which they’ll be used. The goal is to find an amplifier that can provide sufficient power to drive the speakers without overpowering them.

1. Matching Power Rating

The amplifier’s power output should generally match the speaker’s power handling capacity. For instance, if your speakers are rated at 100 watts, you’ll want an amplifier that can deliver 100 to 150 watts per channel. This ensures that the amplifier can drive the speakers efficiently without causing distortion or damage.

2. Impedance Compatibility

Speakers have an impedance rating, usually measured in ohms, that the amplifier must match. Common impedance values are 4, 6, or 8 ohms. The amplifier should be capable of driving the speaker’s impedance; otherwise, it may overheat or fail to deliver optimal sound quality.

3. Application and Environment

Consider where and how the speakers will be used. For a small room, a lower-powered amplifier might be sufficient, while larger spaces or outdoor settings may require a more powerful amplifier. If you’re setting up a home theater system, you might need an amplifier that supports multiple channels to handle different speakers in a surround sound configuration.

4. Sound Quality Preferences

If you’re an audiophile or someone who values high-quality sound, you might opt for an amplifier that prioritizes sound fidelity, such as a Class A or Class AB amplifier. For more general purposes or where efficiency is key, a Class D amplifier might be more suitable.

What Is the Difference Between a Mixing Board and an Amplifier?

A mixing board, also known as an audio mixer, combines multiple audio signals into one or more outputs. It allows you to adjust levels, EQ, and other parameters for each input channel. On the other hand, an amplifier boosts the power of the audio signal to drive speakers. While a mixing board controls the audio mix, an amplifier ensures that the mix is loud enough for playback through speakers.

What is an Amplifier Board? – Definition, Types, Uses

What Is the Main Advantage of an Amplifier?

The main advantage of an amplifier is its ability to enhance audio signals, allowing them to be played at higher volumes while maintaining sound clarity and fidelity. This is particularly important in situations where audio needs to be heard clearly over background noise or across large distances.

1. Loudness and Clarity: Amplifiers ensure that audio signals are strong enough to drive speakers and produce sound at desired volume levels. This is essential for ensuring that music, speech, and other audio content are heard clearly, whether in a small room, a large auditorium, or an outdoor event.

2. Improved Sound Quality: A well-designed amplifier can improve the overall sound quality of an audio system by minimizing distortion and noise, ensuring that the output remains true to the original recording.

3. Versatility and Control: Amplifiers often come with features that allow users to control various aspects of the audio signal, such as volume, balance, and equalization.

What Happens if an Amp is Too Powerful for Speakers?

Using an amplifier that is too powerful for your speakers can result in speaker damage. When an amplifier delivers more power than the speakers can handle, it can cause the speaker components to overheat or even blow out. It’s essential to match the amplifier’s power output to the speaker’s power rating to avoid such issues. Always refer to the manufacturer’s specifications to ensure compatibility.

How Many Watts is Good for a Speaker?

The appropriate wattage for a speaker depends on the intended use and the size of the space in which it will be used. For small rooms, speakers with a power rating of 20 to 50 watts per channel may suffice. For larger spaces or outdoor use, speakers rated at 100 watts or more per channel are recommended. It’s important to match the amplifier’s power output to the speaker’s rating to ensure optimal performance and longevity.

What is the Basic Use of an Amplifier?

An amplifier’s basic use is to boost the power of audio signals so that they can drive loudspeakers effectively. Without amplification, the audio signal would be too weak to produce a meaningful sound output from the speakers. Amplifiers are used in various audio systems, including home theaters, car audio systems, and public address systems, to ensure that the sound is loud and clear.

Which Class Amplifier is Best for Sound Quality?

For sound quality, Class A amplifiers are often considered the best. They provide a consistent and high-quality output, making them ideal for high-fidelity audio systems. However, they are less efficient and generate more heat compared to other classes. For a balance between sound quality and efficiency, Class AB amplifiers are a popular choice, offering good sound quality while being more power-efficient than Class A.

Does an Amplifier Improve Sound Quality?

Yes, an amplifier can improve sound quality, especially when it’s well-matched to the speakers and the rest of the audio system. A good amplifier ensures that the audio signal is amplified without introducing distortion or noise. It also provides the necessary power to drive speakers, allowing them to perform at their best. However, it’s important to choose an amplifier that complements your audio setup to achieve the best sound quality.

Amplifier Board HS Code

The Harmonized System (HS) code for amplifier boards varies depending on the specific type and application. Generally, amplifier boards fall under the category of electronic integrated circuits or modules, which are typically classified under HS code 8542.90. However, it’s advisable to consult with a customs expert or refer to your country’s specific tariff schedule for precise classification.

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What is a 3A masterpiece? Why is Black Myth Wukong so popular?
星期五, 23 8 月, 2024

In the field of games, domestic games have always been labeled as “low-quality” and “imitation”, and the emergence of “Black Myth Wukong” has undoubtedly dropped an atomic bomb on the entire game industry, attracting Chinese people to applaud. It will leave a strong mark in the history of games. Since the first trailer was launched, industry peers and players have high expectations for Black Myth, and it has even been dubbed the “light of domestic games”.

What is a 3A masterpiece?

3A masterpieces usually refer to games with high development costs (a lot of money), long development cycles (a lot of time), and high resource consumption (a lot of resources). These games generally have high quality, large development teams, high development budgets, high visual and auditory effects, perfect combination of art and technology, and outstanding ease of use.

What is a 3A masterpiece? Why is Black Myth Wukong so popular?

3A games represent the pinnacle of production quality, top technology and huge market influence. They are not only entertainment products, but also the perfect combination of technology, art and business. 3A games not only define the highest standards of the industry, but also become the golden benchmark in the minds of global players.

What are the classic 3A masterpieces?

1. Red Dead Redemption 2

The graphics of Red Dead Redemption 2 have reached a very high level in the past and even now. Its game graphics not only show us a real and shocking Western world, but also bring us a brand new experience.

In terms of image quality, it can be said to be top-level. From modeling to scenes and weapons, it is very realistic, and the detailed textures are also very rich, which makes the light in the entire game environment very beautiful, and it can also give players an immersive feeling.

2. Assassin’s Creed: Revolution

This is a high-quality action-adventure game. Players can experience the real style of Paris in the game, and can also choose different professions to unlock different abilities.

The overall picture effect of the game is very good, and the picture quality is also at a very high level. “Assassin’s Creed: Revolution” not only has a very good 3D visual experience, but also has an extremely powerful open world. This world is full of excitement and thrills, and it is a good game.

3. Call of Duty Series

The image quality of “Call of Duty” is relatively top-notch among 3A masterpieces. This is a high-quality 3D game, and the gameplay is very simple, that is, the player controls a special forces soldier to collect resources and ammunition on the battlefield, and use various types of weapons to defeat the enemy.

In addition, it contains not only single-player campaigns, but also cooperative campaigns, multiplayer cooperative campaigns and other types of campaign gameplay. “Call of Duty” also has a very rich map scene, a variety of terrains, weapons, ammunition and other resources and many other elements to provide players with richer content, more gameplay, etc.!

4. Forza Horizon 5

“Forza Horizon 5” is one of the best racing games you can experience at present. Although it has not changed much compared to the previous game, you can still experience the purest driving pleasure in hundreds of hours of game time.

The Mexico map in the game truly reproduces the beauty of various places, from endless deserts to winding wilderness and other terrains, every link allows you to feel its beauty and diversity. In the game, you will not only feel the excitement of racing, but also the shock from the vehicles and maps.

Why is Black Myth Wukong so popular?

For a long time, the production of 3A games has been basically controlled by game developers in Europe, the United States, Japan and other countries. In the field of domestic games, although many excellent works have been launched, before Black Myth Wukong, no single-player game has reached the international 3A game level, nor has it been so concerned by global media and players before it was launched.

What is a 3A masterpiece? Why is Black Myth Wukong so popular?

“Chinese people do not have the strength to make 3A game masterpieces” “China does not have the soil for 3A games to grow”… For a long time, these statements are almost a factual description of the domestic game market and a helpless consensus of the majority of game players.

The aura of the Journey to the West theme, the desire for domestic 3A masterpieces, and even the hope for cultural inheritance are all placed on “Black Myth Wukong”. As Black Myth Wukong is about to “break out of the stone”, domestic 3A games will finally be subject to the heavy test of the market and players.

Judging from the current development results, the graphics of Black Myth Wukong have reached a very high level, and the unique classical scenes also make domestic 3A games more Chinese.

Industry insiders said that the reason why 3A games are regarded as the top works in the game industry is that they pursue excellence in content, plot and art, focus on inheritance and promotion of cultural values, and pursue continuous innovation in technology. An excellent 3A masterpiece not only represents the high level of a country in the game industry, but also symbolizes the country’s cultural soft power and technical strength.

The significance behind the explosion of Black Myth Wukong

First of all, the game fully reflects the excellent traditional Chinese culture in character design and scene design. The image of the character Sun Wukong not only retains the basic characteristics of the original work, but also innovates in details. The scene design is deeply drawn from China’s famous mountains, rivers and ancient buildings.

In addition, the game uses the world’s leading “Unreal 5” development engine, which has achieved movie-level picture quality, which is also an important factor in attracting global players. Industry insiders believe that the popularity of Black Myth Wukong is the inevitable result of cultural confidence and a new expression of the vigorous vitality of traditional culture. ‌

What is a 3A masterpiece? Why is Black Myth Wukong so popular?

The success of Black Myth Wukong has had a profound impact on the Chinese game industry. Within just five minutes of the pre-sale opening, all pre-sale products were sold out, becoming the most watched product in the game industry this year. This game not only meets the expectations of players for domestic masterpieces, but also gives the entire industry great confidence and inspiration. Industry insiders believe that the success of “Black Myth Wukong” will inspire more Chinese game developers to pursue high-quality games and promote the progress of the domestic game industry.

The success of Black Myth Wukong is not only the success of a game product, but also the success of Chinese cultural output. The character design, scene design and props in the game reflect Chinese culture, and these elements have attracted widespread attention worldwide.

The explosion of the game proves that Chinese games have the ability to break the long-term monopoly of European and American companies in the field of high-end games, and open up a new channel for the internationalization of Chinese games. The cultural output of this game is of great significance. It not only shows the charm of Chinese traditional culture, but also provides a new window for the world to understand Chinese culture.

Why were there no 3A games in China before this?

1. One of the reasons why it is difficult to have 3A games in China is that compared with foreign countries, China lacks such a large R&D team and a long R&D cycle.

2. The domestic game market is mainly occupied by mobile games and web games, which have a short development cycle and a fast return on investment, so they are more favored by game companies.

3. Domestic players have a relatively low acceptance of 3A masterpieces, which makes 3A games a relatively niche product in the domestic market.

4. Domestic hardware equipment is relatively insufficient, such as high-end computers are not popular, which also limits the popularity of 3A games in the domestic market.

5. Domestic game companies are technically capable of developing 3A games, but in the current environment, the risks are high and the returns are not stable.

What is a 3A masterpiece? Why is Black Myth Wukong so popular?

With the improvement of domestic hardware level and the increase in players’ acceptance of 3A games, I believe that more 3A games will appear in the domestic market in the future.

Conclusion:

The response to the launch of Black Myth Wukong has given us a good start. It is undoubtedly very good news for all partners who love games and our Chinese culture. We can believe that this is the beginning of our domestic 3A masterpiece games. Next, better and higher-quality works will emerge like mushrooms after rain. Let us look forward to it together!

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What is BGA Full Form? – Best Technology
星期二, 20 8 月, 2024

The full form of BGA is Ball Grid Array. BGA is one of the most important elements in the electronic device. From smartphones to advanced computing systems, BGA electronics are everywhere. In this article, we will discuss what a BGA is? How does it work and its advantages & disadvantages in the modern electronics.

What is a BGA in PCB?

Ball grid Array (BGA) is a surface-mount package used to attach integrated circuits (ICs) to printed circuit boards (PCBs) to permanently protect devices such as microprocessors. Unlike the older through-hole method, BGA utilizes tiny solder balls that are arranged in a grid at the bottom of the IC package. These solder balls allow for more efficient connection to the PCB. BGA packages can accommodate more pins than other packages, such as Dual In-line Packages (DIP) or Quad Flat packages (QFP), and the entire underside of the device can be used as a pin, not just around it. It also has a shorter average line length than the package types defined around it for better high-speed performance.

What is BGA Full Form? - Best Technology

These solder balls can be configured manually or by automated machines and positioned by flux. When the device is fixed on the PCB by surface bonding technology, the arrangement of the bottom tin balls exactly corresponds to the position of the copper foil on the board. The production line then heats it up, either in a reflow oven or an infrared oven, to dissolve the tin balls. The surface tension causes the melted tin balls to hold the seal and align to the board. At the correct spacing, when the tin balls are cooled and fixed, the welded contacts are formed to connect the device to the PCB.

PCB boards with BGA generally have many via holes. Generally, the holes under the BGA chip is designed as a finished hole, with a diameter of 8~12mil. They need to be plugged, no ink and no drilling is allowed on the pad.

How does BGA works?

BGA works by replacing the traditional leads used in older packages with a grid of solder balls. When the IC is mounted to the PCB, the solder balls are heated, causing them to melt and create electrical connections. These connections ensure that the IC functions as intended by linking it directly to the board’s circuitry. The grid arrangement not only makes it possible to pack more connections into a smaller area but also improves the thermal performance, allowing heat to dissipate more efficiently. BGA ICs are thus more reliable and efficient in high-performance applications.

Types of BGA packages

There are many types of BGA packages, which can be categorized based on the arrangement of the solder balls into peripheral, staggered, and full array types. According to the different substrates, the main categories include PBGA (Plastic BGA), CBGA (Ceramic BGA), FCBGA (Flip-chip BGA), and TBGA (Tape BGA). Let’s explain different types of BGAs in detail.

What is BGA Full Form? - Best Technology

1. PBGA Package

PBGA is the most commonly used BGA packaging type, made using plastic materials and plastic processes. The substrate used is PCB substrate material (BT resin/glass laminate). The bare chip is attached and connected to the top of the substrate and the lead frame using bonding and WB technology, followed by molding through the injection process (epoxy film/plastic mixture). Intel CPUs, including Pentium II, III, and IV processors, use this packaging type.

The solder ball material is a low-melting-point eutectic solder alloy 63Sn37Pb, with a diameter of about 1mm and a spacing range of 1.27-2.54mm. The connection between the solder balls and the bottom of the package does not require additional solder. During assembly, the solder balls melt, joining with the PCB surface pads, forming a barrel shape.

What is BGA Full Form? - Best Technology

Features of PBGA packaging

  • Low production cost, high cost-effectiveness.
  • The solder balls participate in the reflow soldering joint formation, and the coplanarity requirements are relatively loose.
  • Good thermal compatibility with epoxy resin substrates, ensuring high quality and performance when assembled onto PCBs.
  • Sensitive to moisture, with a serious PoPCorn effect, which presents reliability issues. The height of the package is also a technical challenge compared to QFP.

2. CBGA Package

CBGA involves mounting the bare chip on the top surface of a ceramic multilayer substrate. A metal cover plate is soldered onto the substrate using sealing solder, protecting the chip, leads, and pads. The connected package undergoes hermetic sealing to improve reliability and physical protection. Pentium I, II, and Pentium Pro processors have used this packaging type. CBGA employs multilayer ceramic wiring substrates, with the solder ball material being high-melting-point 90Pb10Sn eutectic solder. The connection between the solder balls and the package is made using low-temperature eutectic solder 63Sn37Pb, with a sealed cap and glass hermetic sealing, placing it in the hermetic packaging category.

What is BGA Full Form? - Best Technology

Features of CBGA packaging

  • Not sensitive to moisture, high reliability, and excellent electrical and thermal performance.
  • Good CTE compatibility with ceramic substrates.
  • Better reworkability for connecting chips and components.
  • The bare chip uses FCB technology, allowing for higher interconnection density.
  • Higher packaging cost.
  • Poor CTE compatibility with substrates like epoxy resin.

3. FCBGA Package

FCBGA is currently the main packaging format for graphics accelerator chips. This packaging technology originated in the 1960s when IBM developed the so-called C4 (Controlled Collapse Chip Connection) technology for large computer assembly. It was later developed further to utilize the surface tension of molten bumps to support the chip’s weight and control the bump height, becoming a direction in flip-chip technology development.

This packaging uses small balls instead of pins to connect the processor. A total of 479 balls are used, each with a diameter of 0.78mm, providing the shortest external connection distance. FCBGA connects the chip to the substrate using FCB technology, differing from PBGA in that the bare chip faces downward.

4. TBGA Package

TBGA, also known as Tape Ball Grid Array, is a relatively novel BGA packaging format. It uses PI multilayer wiring substrates, and the solder ball material is high-melting-point solder alloy, with low-melting-point solder alloy used during welding.

What is BGA Full Form? - Best Technology

Advantages of BGA

  1. BGA packages are smaller in size compared to SOP packages. For the same memory IC and capacity, the volume of a BGA is only one-third that of an SOP package.
  2. In QFP and SOP packages, the leads are distributed around the perimeter of the package. As the number of leads increases, the spacing decreases, making the leads prone to deformation and bending. In contrast, BGA solder balls are located on the bottom of the package, and the spacing is larger, significantly improving the yield rate.
  3. BGA leads are very short, using solder balls instead of wires. The signal path is short, reducing inductance and capacitance, which enhances electrical performance.
  4. The spherical contact array and the gap formed with the substrate improve heat dissipation from the package body.
  5. BGA body and PCB board have good coplanarity, can effectively ensure the quality of welding.

Disadvantages of BGA

  1. After soldering, it is difficult to inspect and repair BGA packages. X-ray inspection is required to ensure the electrical performance of the solder joints. Quality cannot be determined through visual inspection or Automated Optical Inspection (AOI).
  2. Since the BGA pin is at the bottom of the body, which is easy to cause welding shadow effect, so the welding temperature curve is higher. The actual welding temperature must be monitored in real time.
  3. If individual BGA solder joints are faulty, the entire BGA package must be removed, re-balled, and then resoldered. This affects the throughput rate and electrical performance.
  4. BGA packages are more robust compared to QFP packages with 20 mil spacing. BGAs do not have leads that can bend or break. Soldering is secure, and if the BGA needs to be removed, a high-temperature rework station must be used.

What is the difference between BGA and FPGA?

BGA refers to a packaging type, while FPGA is a type of semiconductor device that can be programmed after manufacturing. An FPGA can be packaged in a BGA format, but they are not the same thing.

FPGA is further developed on the basis of traditional logic circuits and gate arrays such as PAL (Programmable logic Array), GAL (universal array logic), CPLD (complex programmable logic device). It uses computer-aided design to draw the schematic diagram, edit Boolean equation or use hardware description language as design input. Then through a series of conversion programs, automatic layout and wiring, simulation and simulation process; Finally, the data file of FPGA is generated and the FPGA device is initialized. In this way, the ASIC that meets the requirements of users is realized, and the purpose of designing, developing and producing integrated circuits by users is truly achieved.

What is BGA Full Form? - Best Technology

FPGA consists of programmable logic block (CLB), input/output module (IOB), programmable Interconnect resource (PIR) and static memory SRAM used to store programming data. CLBS are the basic units that implement logic functions, and they are usually arranged in a regular array, scattered throughout the chip. The IOB mainly completes the interface between the logic on the chip and the external pins, and is usually arranged around the chip. PIR provides a wealth of connection resources, including crossbar mesh connections, programmable switch matrices, and programmable connection points, which connect individual CLBS, CLBS and IOBs, and IOBs to form circuits for specific functions. Static memory SRAM is used to store the programming data of internal IOB, CLB and PIR, and form the control of IOB, CLB and PIR, so as to complete the system logic function.

If you want to know more about BGA, welcome to leave your message below.

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Let you know about PCB copper layer thickness
星期五, 16 8 月, 2024

In the printed circuit board industry, the most common way to express the copper layer thickness on a PCB is in ounces (oz). 1oz means 1oz of copper evenly covers an area of 1 square foot, which is about 1.4mil. It uses the weight of the tissue area to express the average thickness of the copper foil. Expressed in terms of formula, 1oz=28.35g/FT2 (FT2 is square feet, 1 square foot = 0.09290304 square meters).

What is the standard thickness of a copper layer on a PCB?

In the manufacture of printed circuit boards (PCBs), the thickness of the copper layer is an important parameter that directly affects the electrical performance and reliability of the circuit board. Depending on the application requirements, the thickness of the copper layer can vary within a certain range. Generally speaking, the conventional copper layer thickness is between 1-35μm, with 35μm being the most commonly used thickness. For some applications with high reliability requirements, the copper layer thickness may reach more than 50μm.

The selection of the thickness of the copper layer is a decision-making process that takes into account a variety of factors, including the conductivity, heat dissipation, mechanical strength, cost and manufacturing difficulty of the circuit board. A larger copper thickness can reduce resistance and improve the conductivity and heat dissipation of the circuit board, but it will also increase material costs and production difficulties. Therefore, when designing PCB boards, engineers need to select a suitable copper thickness standard range based on specific application scenarios and design requirements to ensure the performance and reliability of the circuit board.

1oz copper thickness in mm = 0.035mm

0.5 oz copper thickness in mm = 0.0175mm

1.5 oz copper thickness in mils = 0.0525mm

2 oz copper thickness in mils =  0.07mm‌

How thick is PCB copper after plating?

PCB printed circuit boards are usually bonded to glass epoxy substrates with a layer of copper foil, usually 18, 35, 55 and 70 microns thick. The most commonly used copper foil is 35 microns thick.

The copper foil used by PCB manufacturers is generally 35~50 microns thick, and some are thinner than this, such as 10 microns, 18 microns, and thicker such as 70 microns. The thickness of the composite copper foil on a 1~3 mm thick substrate is about 35 microns. The thickness of the composite copper foil on a substrate with a thickness of less than 1MM is about 18 microns, and the thickness of the composite copper foil on a substrate with a thickness of more than 5 mm is about 55 microns.

The copper layer thickness of PCB (printed circuit board) can be adjusted according to different needs and designs. Common copper layer thicknesses include 1oz (35μm), 2oz (70μm), 3oz (105μm), and other thicker options. For most applications, a copper layer thickness of 1oz is sufficient and suitable for general signal transmission. ‌For circuit boards that need to carry large currents, such as switching power supplies, a copper layer thickness of 2oz or higher is usually used. ‌In addition, there are some special cases where manufacturers provide extremely heavy copper up to 20 oz/ft2 (26.8 mils or 0.34 mm) to meet special needs. ‌

When choosing the thickness of the copper layer, factors such as the purpose of the circuit board and the magnitude of the signal voltage and current need to be considered. ‌For example, for circuit boards that require excessive current, a copper thickness of 70μm or 105μm may be used. ‌For thin laminates that require ultra-high density patterns, a copper thickness of 12μm may be used. ‌Therefore, the specific thickness of the PCB after copper plating is determined according to design requirements and specific applications.‌

How thick is 2 oz copper for PCB?

If 1 ounce (28.35 grams) of copper were flattened to evenly cover a surface area of 1 square foot (0.093 square meters), the resulting thickness would be 1.37mils (0.0348mm). A conversion chart for different units of measurement can be found below.

PCB copper layer thickness 

What is the difference between different copper thicknesses in PCB?

‌Copper is an excellent conductive material, and the thickness of the copper layer directly affects the conductive effect of the circuit board. ‌Thicker copper layers can provide lower resistance, reduce signal transmission losses, and are particularly suitable for high-frequency and high-speed digital circuits. ‌

During the operation of electronic equipment, good heat dissipation is a key factor in ensuring the performance and life of components. ‌Thicker copper layers can conduct and dissipate heat more effectively, preventing components from overheating. ‌

In high-power electronic devices, thicker copper layers can carry larger currents, avoiding burnout or performance degradation caused by excessive current.

Below is the conductivity corresponding to different copper thicknesses.

PCB copper layer thickness 

How thick is high current PCB copper?

In PCB design, copper thickness (also called copper thickness) is an important parameter, which directly affects the performance indicators of the circuit board such as current carrying capacity, heat dissipation and reliability. For PCBs that need to withstand high currents, such as high-power LED light strips, power circuit boards, high-power motor control boards or high-power inverter control boards, thicker copper layers are usually used to increase current carrying capacity.

PCB copper layer thickness 

Different uses have different copper foil thicknesses. Common 0.5oz, 1oz, and 2oz are mostly used in consumer and communication products. Thick copper products above 3oz are mostly used for high currents, such as high-voltage products and power boards.

The thickness of copper foil (track width) will affect the current size. Although there is a formula that can directly calculate the maximum current carrying capacity of copper foil, it is not so simple when actually designing the circuit. Therefore, the safety factor should be fully considered during the design.

How thick is the copper in a flex PCB?

The thickness of copper foil in flexible PCB is generally 18μm, 35μm, 55μm and 70μm. These thickness specifications are suitable for different types of circuit board requirements, among which 35μm is the most commonly used copper foil thickness.

PCB copper layer thickness 

For flexible PCB, the choice of copper foil thickness depends on the specific purpose of the circuit board and the size of the signal voltage and current. For example, for PCBs that require excessive current, some parts will use 70μm copper thickness, while for signal transmission, 1oz (35μm) thickness is usually sufficient. In addition, for substrates of different thicknesses, the thickness of copper foil is also different. For example, the thickness of the composite copper foil on a 1mm thick substrate is about 18μm, and on a substrate thicker than 5mm, the thickness of the composite copper foil is about 55μm.

Conclusion:

PCBs for different usage scenarios correspond to different thicknesses of copper, and its thickness directly affects the conductive effect of the circuit board. If the copper layer is too thin, the conductivity may decrease, resulting in signal transmission attenuation or current instability. If the copper layer is too thick, although the conductivity will be very good, it will increase the cost and weight of the circuit board and easily lead to serious glue flow. In PCB manufacturing, it is necessary to select the appropriate copper thickness according to the design requirements and actual applications of the circuit board to achieve the best conductive effect.

BEST Technology is a professional PCB circuit board manufacturer with a large area of site and equipped with useful and experienced production personnel. Corresponding to different thicknesses of copper, we have rich production and processing experience. We can meet the requirements of any circuit board copper layer thickness.‌

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How to Make SMT? What is SMT Process?
星期四, 15 8 月, 2024

What is the SMT?

Surface Mount Technology (SMT) is a production technique used to attach electronic components directly onto the surface of a printed circuit board (PCB). This method enables automated manufacturing to handle most of the assembly process needed to create a functioning board. Components attached in this way are known as surface-mount devices (SMDs). Unlike traditional methods, SMT does not involve inserting components through holes in the board. Instead, components are soldered directly onto the surface using reflow soldering.

Originally known as Planar Mounting, SMT was pioneered by IBM in the 1960s for small-scale computer production, replacing the earlier Through-Hole Technology. However, SMT didn’t gain widespread use until 1986, when surface-mounted components achieved 10% market penetration. By 1990, SMDs had become a dominant feature in most high-tech circuit card assemblies (CCAs).

How to Make SMT? What is SMT Process?

What is the process of SMT manufacturing?

The SMT manufacturing process can be divided into three main stages: solder paste printing, component placement, and reflow soldering. Due to the complexity of the process, each stage is further broken down as follows:

1. Component and PCB Preparation

This initial stage involves selecting surface-mount components (SMCs) and designing the PCB. The board typically features flat copper pads plated with silver, tin-lead, or gold, which are called solder pads. These pads do not have holes and are used to support the pins of components like chips and transistors.

Another crucial element is the stencil, which is aligned with the solder pads to define the placement of solder paste during the next stage. The PCB and all materials involved must be thoroughly inspected to ensure there are no defects before proceeding with production.

2. Solder Paste Printing

Solder paste printing is a critical phase in SMT production. A stencil and squeegee are used to apply solder paste at an angle of 45° to 60°. The solder paste itself is a combination of powdered metal solder and flux, which temporarily holds components in place and cleans the soldering surfaces of impurities.

The paste is applied to the solder pads, connecting the SMCs to the PCB once melted in the reflow oven. It’s essential that the correct amount of paste is applied to each pad, as improper application can prevent proper connections from forming during reflow.

3. Component Placement

In this stage, pick-and-place machines accurately position components on the PCB. The machines use vacuum or gripper nozzles to remove each component from its packaging and place it onto the board. These machines are fast and precise, capable of placing up to 80,000 components per hour.

Precision is key here, as any misplaced components could lead to costly rework once soldered.

4. Reflow Soldering

After components are placed, the PCB is moved into the reflow oven for soldering. The board passes through several temperature-controlled zones:

  • Preheat Zone

The temperature is gradually increased to between 140℃ and 160℃ at a rate of 1.0℃-2.0℃ per second to ensure the board and components heat evenly.

  • Soak Zone

The PCB is maintained at this temperature for 60 to 90 seconds to stabilize the heat across the entire board.

  • Reflow Zone

The temperature is then raised to 210℃-230℃ to melt the solder paste, bonding the components to the PCB. The molten solder’s surface tension keeps the components in place during this process.

  • Cooling Zone

In the final zone, the solder is rapidly cooled to solidify the connections and prevent any soldering defects.

For double-sided boards, this process may need to be repeated, either using solder paste or adhesive to secure components.

How to Make SMT? What is SMT Process?

5. Cleaning and Inspection

Once the soldering process is complete, the PCB is cleaned and inspected for any defects. This is done using magnifying lenses, Automated Optical Inspection (AOI), flying probe testers, X-ray inspection, and other tools to ensure accuracy. Any flaws are repaired before the finished product is packaged and stored.

What are the basics of SMT?

SMT simplifies assembly by reducing the need for drilled holes and using smaller components. Unlike traditional through-hole components, SMT parts are placed on the surface of the PCB, making the design more compact.

The basic elements of SMT include:

  • PCBs: The base for components, designed with specific pads for each part.
  • Solder Paste: A mixture of metal solder particles and flux, used to create a bond between components and the board.
  • SMT Components: Small electronic parts, such as resistors, capacitors, and ICs, that attach to the PCB.

The transition from through-hole technology to SMT has improved manufacturing speed and performance in electronics.

How do I prepare for SMT?

As the core step of electronic product manufacturing, PCBA’s preparation before assembly directly affects the quality and reliability of the final product. The following is a detailed analysis from multiple dimensions:

1. Component inspection

Before assembly, all electronic components must undergo strict screening and inspection. This includes checking that the component type, package, number of pins, etc. are consistent with the BOM (Bill of Materials), as well as performing the necessary electrical performance tests.

2. Take ESD measures

Static damage to electronic components is invisible, but the consequences are serious. Therefore, when distributing materials and testing IQC, warehouse personnel should wear anti-static gloves, reliably ground the instrument, and lay anti-static rubber MATS on the work surface. During the assembly process, the operator should also wear anti-static clothes, anti-static bracelets and other protective equipment to ensure that the workbench and equipment are well grounded.

3. Cleanliness requirements

The work workshop and workbench must be kept clean to prevent contaminants such as dust and impurities from entering the circuit board, affecting the accuracy and quality of the patch. Clean the work surface and workshop floor regularly. Smoking, eating and drinking are strictly prohibited in the work area.

How to Make SMT? What is SMT Process?

4. Temperature and humidity control

Appropriate temperature and humidity should be maintained in the workshop to reduce static electricity generation and the impact on electronic components. It is usually recommended that the temperature be controlled at 23±3oC and the humidity be controlled at 45% to 70%RH. This environment helps to ensure the quality of welding and the stability of electronic components.

5. PCB appearance check

Before assembly, the PCB board should be visually inspected to confirm whether it is complete, whether the surface coated solder resistance layer is intact, and whether there are obvious short circuits and defects. Use a multimeter to check whether there is a short circuit between the power supply and the ground terminal on the printed board, and ensure that the printed board is fine.

6. Check the software and hardware

When the PCBA needs to be upgraded, the motherboards produced in different time periods should not be mixed together to avoid mixing problems. Before assembly, check whether the final use of the software is in accordance with customer requirements to ensure that the software and hardware are compatible and correct.

7. Welding process selection

According to the layout of the circuit board and the characteristics of the components, select the appropriate welding process (such as wave soldering, reflow welding, hot blast furnace welding, etc.). Each welding method has specific requirements for the placement, orientation and spacing of components that need to be planned in advance.

8. Manually prepare the post-welding plug-in components

For some components that cannot be automatically welded (such as large connectors, heat sinks, etc.), manual plug-in assembly is required. This requires the operator to have a wealth of experience and skilled skills to ensure the accuracy and robustness of the plug-in.

9. Perform ESD operations

During operation, use an ESD workbench and an ESD container to hold components and semi-finished products. All welding equipment should be grounded, the electric soldering iron must be anti-static type, and tested before use.

10 Cleaning and protective treatment

After the assembly is complete, the product needs to be cleaned to remove the residue and contaminants generated during the welding process. At the same time, appropriate protective treatment of the product, such as spraying three anti-paint, etc., to improve the product’s moisture, dust and corrosion resistance.

Which solder paste is used in SMT?

The type of solder paste used in SMT assembly process depends on several factors, such as the materials of the components and the PCB, as well as the operating conditions of the finished product. Generally, there are mainly include high temperature solder paste, ‌ medium temperature solder paste and low temperature solder paste. ‌

  • High temperature solder pastes are commonly used in applications where higher temperatures are required for welding. ‌ has a higher melting point and ‌ is suitable for welding electronic components with specific temperature requirements. ‌
  • Medium temperature solder paste and low temperature solder paste are suitable for medium and low temperature welding respectively, ‌ select the appropriate solder paste type according to the specific welding needs. ‌
How to Make SMT? What is SMT Process?

In addition, ‌ solder paste can also be classified according to the flux activity level, ‌ including “R” (‌ inactive) ‌, ‌ “RMA” class (‌ moderate activity) ‌, ‌ “RA” class (‌ completely reactive) ‌ and “SRA” class ‌ (‌ super activity). ‌ Different types of activity levels are suitable for different application scenarios, ‌ for example, ‌ “R” grade is usually used for welding aerospace, ‌ avionics products, ‌ and “RA” grade is suitable for consumer electronics products. ‌ This classification allows users to choose the right solder paste according to the specific application needs and cleaning process requirements. ‌

What temperature should a soldering iron be for SMT?

The right temperature for soldering in SMT can vary depending on the solder paste and components you’re using. Typically, the soldering iron should be set between 250°C and 300°C. Using a lower temperature might not properly melt the solder, while a higher temperature could damage components or the PCB.

Of course, different types of PCB requires different temperature. For example, ceramic PCBs has fragile surface, so a lower temperature is good.

What are the disadvantages of SMT?

  • Small volume (due to the limitation of components)
  • Fragility
  • High soldering requirements
  • Easily damaged or dropped
  • Challenging to inspect
  • Complex process and inspection
  • High equipment investment

How to solder SMT at home?

Soldering SMT components at home can be tricky, but with the right tools and techniques, it’s doable. Here’s a quick guide:

  1. Tools: You’ll need a fine-tip soldering iron, tweezers, solder paste, and flux. You may also want a magnifying glass or microscope for better visibility.
  2. Apply Solder Paste: Use a small amount of solder paste on the pads of the PCB where you want to place your components.
  3. Place Components: With tweezers, carefully place the components onto the solder paste. Make sure they are properly aligned with the pads.
  4. Reflow the Solder: If you have a reflow oven, you can use it to heat the board. Alternatively, a hot air rework station can also work.
  5. Inspect: Once the solder has cooled, check the connections. If necessary, reheat or add more solder to fix any weak joints.

Best Technology is a one-stop PCB & PCB assembly manufacturer founded in 2006, with 5 assembly lines. If you have needs for PCB and PCBA fabrication, we can be your reliable supplier from prototypes to bulk production. In addition, we have SMT factory in Vietnam, if you don’t want to make smt in Shenzhen, then we can support you in Vietnam. Welcome to contact us if you have such PCB and PCBA projects.

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What is copper clad laminate and its pros and cons
星期六, 10 8 月, 2024

What is copper clad laminate?

Copper clad laminate (CCL) is a plate-like material made by impregnating electronic fiberglass cloth or other reinforcing materials with resin, covering one or both sides with copper foil and hot pressing. It is referred to as copper clad laminate.

Printed circuit boards of various forms and functions are selectively processed, etched, drilled and copper-plated on copper clad laminates to make different printed circuits.

what is copper clad laminate?

It mainly plays the role of interconnection, insulation and support for printed circuit boards, and has a great influence on the transmission speed, energy loss and characteristic impedance of signals in the circuit. Therefore, the performance, quality, processability, manufacturing level, manufacturing cost and long-term reliability and stability of printed circuit boards depend to a large extent on copper clad laminates.

What is flexible copper clad laminate?

Flexible copper clad laminate is a special copper clad laminate, which is composed of a flexible insulating base film and a metal foil. It is usually composed of three different materials: copper foil, film, and adhesive, forming a three-layer flexible copper clad laminate. ‌

If there is no adhesive in the flexible copper clad laminate, it is called a two-layer flexible copper clad laminate. ‌Flexible copper clad laminate is formed by bonding copper foil to one or both sides of a flexible insulating material such as polyester film or polyimide film through a certain process. ‌

This material is widely used in the electronics industry, especially in electronic devices that need to bend, move, and stretch, such as laptops and digital cameras. ‌The characteristics of flexible copper clad laminate include thinness, lightness, and flexibility, which give it obvious advantages in high-density wiring, light weight, and small size. ‌

what is flexible copper clad laminate?

In addition, flexible copper clad laminate plays an important role in the manufacturing process of electronic products. Its performance directly affects the conductivity, insulation, and support of the PCB circuit board, thereby affecting the overall performance and cost of the product.

What are the performance requirements for copper clad laminates?

  1. Appearance requirements: The appearance of the copper clad laminate should meet certain standards, including that the metal foil surface should not have pits, scratches, resin spots, wrinkles, pinholes, bubbles, white silk and other defects.
  2. Dimension requirements: Including the board size, length, width, diagonal deviation, warpage, etc. should comply with the regulations. The nominal board size and allowable deviation, nominal thickness and deviation, verticality, warpage, etc. of aluminum-based copper clad laminates also have specific requirements23. 3. Electrical performance requirements: Including dielectric constant (Dk), dielectric loss tangent (Df), volume resistance, surface resistance, insulation resistance, arc resistance, dielectric breakdown voltage, electrical strength, comparative tracking index (CTI), ion migration resistance (CAF), etc. ‌
  3. Physical performance requirements: including dimensional stability, peel strength (PS), bending strength, heat resistance (thermal stress, Td, T260, T288, T300), punching, etc. ‌
  4. Chemical performance requirements: including flammability, solderability, chemical resistance, glass transition temperature (Tg), Z-axis thermal expansion coefficient (Z-CTE), dimensional stability, etc. ‌
  5. Environmental performance requirements: including water absorption, pressure vessel boiling test, etc., to ensure that the copper clad laminate can maintain stable performance under specific environmental conditions. ‌
  6. Environmental performance requirements: The copper clad laminate should comply with relevant environmental standards, contain no harmful substances, no odor, and have no adverse effects on the human body and the environment.‌

What are the pros and cons of copper cladding?

Advantages of copper clad laminate for circuit boards

  1. Excellent electrical conductivity: copper clad laminate for circuit boards can provide high electrical conductivity and can be used for high-speed signal transmission and high current transmission.
  2. Good corrosion resistance: The surface of copper clad laminate for circuit boards is coated with a protective copper oxide layer, which can effectively prevent copper from corrosion in humid and acidic environments and extend the life of the circuit board.
  3. Easy to process and print: After processing, copper clad laminate for circuit boards can be processed and printed by etching, gold plating, machining and other methods.
  4. Convenient for the production of multi-layer circuit boards: copper clad laminate for circuit boards can be used as inner copper foil for the production of multi-layer circuit boards, which can improve the performance and density of circuit boards and reduce the volume of circuit boards.

Disadvantages of copper clad laminate for circuit boards

  1. High cost: Compared with other materials such as aluminum substrates, copper clad laminate for circuit boards has a higher manufacturing cost, so the price is relatively expensive.
  2. Large thermal expansion coefficient: The thermal expansion coefficient of copper clad laminate for circuit boards is different from that of other materials, which can cause bending and cracking of circuit boards when different temperatures change.
  3. Corrosion performance needs to be improved: Although the copper clad laminate of the circuit board has good corrosion resistance, it may still be damaged by strong acid, strong alkali or high temperature, which needs further improvement.

What is copper clad laminate made of?

Copper clad laminates are mainly made of electronic fiberglass cloth or other reinforcing materials impregnated with resin, covered with copper foil on one or both sides and hot pressed. This material is referred to as copper clad laminate (Copper Clad Laminate, CCL), which is the substrate material of printed circuit boards (PCBs) and also the carrier of electronic components. ‌

what is copper clad laminate made of?

The manufacturing process of copper clad laminates includes impregnating electronic fiberglass cloth or other reinforcing materials with resin, then covering one or both sides with copper foil, and curing it into shape by hot pressing. ‌Such a manufacturing process enables copper clad laminates to have excellent electrical and mechanical properties, which can meet the needs of different applications. ‌

In addition, there are various types of copper clad laminates, including but not limited to high-frequency copper clad laminates, aluminum-based copper clad laminates, copper-based copper clad laminates, etc. These different types of copper clad laminates differ in material composition and application fields, but the common feature is that they are all based on copper foil and resin and are made through different processing techniques.

Copper Clad Laminate Grade?

FR-1 – phenolic cotton paper, this base material is commonly known as bakelite (more economical than FR-2)
FR-2 – phenolic cotton paper,
FR-3 – cotton paper, epoxy resin
FR-4 – Woven glass, epoxy resin
FR-5 – glass cloth, epoxy resin
FR-6 – matte glass, polyester
G-10 – glass cloth, epoxy resin
CEM-1 – cotton paper, epoxy resin (flame retardant)
CEM-2 – cotton paper, epoxy resin (non-flame retardant)
CEM-3 – glass cloth, epoxy resin
CEM-4 – glass cloth, epoxy resin
CEM-5 – glass cloth, polyester
AIN – aluminum nitride
SIC – silicon carbide

Copper Clad Laminate Grade?

What is copper clad laminate used for?

  1. Electronic communication field
    Copper clad laminates are widely used in electronic products such as mobile phones, computers, communication equipment, network equipment, etc. Among them, mobile phones are one of the most important application fields of copper clad laminates, and the quality of copper clad laminates used in mobile phones has a great impact on the performance and quality of mobile phones.
  2. Computer field
    With the development of computers, the application scope of copper clad laminates has gradually expanded, and gradually become an indispensable part of computer hardware. For example, copper clad laminates are widely used in hardware such as power boards, motherboards, expansion cards, and memory sticks.
  3. Consumer electronics field
    With the increasing popularity of consumer electronic products, the application of copper clad laminates in this field has gradually increased. For example, copper clad laminates are used in products such as smart watches and smart homes.
  4. Automotive electronics field
    Automotive electronics is one of the future development directions, and copper clad laminates are also widely used in the field of automotive electronics, such as in-vehicle entertainment systems, in-vehicle navigation systems, body control systems, etc.

All electronic machines, including aviation, aerospace, remote sensing, telemetry, remote control, communications, computers, industrial control, household appliances, and even advanced children’s toys, are all important electronic materials that are indispensable.

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pcb support metallic
星期五, 9 8 月, 2024

pcb support metallic are mainly used to support and fix circuit boards to ensure their stability and reliability. The following is a summary of the materials and types, functions and uses of PCB metal support columns, as well as their market supply.

pcb support metallic

Materials and types: ‌
1.The materials are mainly brass, stainless steel and other metals, which have good conductivity and corrosion resistance. ‌
2.Types include hexagonal double-pass copper columns, single-head isolation copper columns, external hexagonal PCB metal external thread spacing screw columns, etc. ‌
Functions and uses: ‌
1.Support and fix circuit boards to prevent them from moving or deforming during use. ‌
2.Provide circuit connection points to achieve electrical connection between circuit boards. ‌
Market supply: ‌
1.There are many suppliers in the market that provide PCB metal support columns of different specifications and materials. ‌
2.Suppliers usually provide customized services to meet the specific needs of customers. ‌

Materials and types: ‌

What is a PCB support column

PCB support columns, also known as circuit board support columns, are mainly used to support and connect circuit boards and are widely used in computer connectors, various PCB assemblies, and electronics. These support columns are usually made of insulating materials such as plastic and nylon, and have good insulation properties and mechanical strength. They have various designs, including aircraft type, flat bottom type, hexagonal type, and other shapes to meet different installation and usage requirements.

What is a PCB support column

Function of PCB support column

PCB support columns play an important role in multiple application scenarios. ‌
To ensure the stability and reliability of PCB in various application scenarios, the support columns are used to support and position the sub-board, ensure that the sub-board is placed flat on the carrier, and thus improve the welding effect between the sub-board and the carrier. ‌In the injection mold, the support column supports the B plate to prevent it from being deformed by pressure during injection molding. ‌In the design of large-load electric cylinders, the support column plays a role in enhancing structural strength, improving pressure resistance, optimizing load capacity, maintaining accuracy and stability, and extending service life. ‌
In addition, in the communication engineering PCB welding and docking support device, the support column is used to clamp and fix the docking plug to ensure that the communication engineering PCB can be stably docked and welded. ‌
In summary, the main function of the PCB support column is to provide stable support and positioning to ensure the stability and reliability of the PCB in various application scenarios.

How to choose PCB support columns?

Choosing a suitable PCB support column requires comprehensive consideration of multiple factors such as performance, material, size, and cost
1.Performance requirements: Determine the performance required by the support column according to the application scenario, such as load-bearing capacity, corrosion resistance, and high temperature resistance. ‌
2.Material selection: Common materials include metal, plastic, etc. Metal support columns are strong and durable, but may be susceptible to corrosion; plastic support columns are light and have good insulation, but may not be strong enough.
3.Size and shape: The size and shape of the support column should match the specifications and installation requirements of the PCB to ensure stable support and connection. ‌
4.Cost and budget: Under the premise of meeting performance requirements, consider the cost and budget of the support column and choose a cost-effective product

PCB support column material?

PCB support columns are widely used in the electronics field. They are mainly used to support and connect circuit boards. ‌ Common PCB support column materials include nylon, plastic, metal (such as brass, stainless steel, aluminum) and resin, etc. Nylon and plastic are the most commonly used materials due to their good insulation performance, easy processing and low cost. Metal materials such as brass and stainless steel are selected in certain specific applications due to their good mechanical strength and conductivity. ‌ Resin materials are also used in the production of some PCB support columns due to their insulation and processing properties.

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What is a 5.1 amplifier board?
星期三, 7 8 月, 2024

A 5.1 amplifier board is a sound amplifier that can expand the current and voltage of an audio signal to make the sound louder. In addition, a 5.1 amplifier board also has a multi-channel processing function, which can output audio signals through multiple channels to enhance the sound field effect, making listening to music, watching movies, etc. more three-dimensional and realistic.
Compared with traditional 0 and 1 amplifiers, in addition to being able to connect two front speakers and two rear speakers, a 5.1 amplifier board can also connect a center speaker and a subwoofer, making the bass of music or movies more prominent and the sound deeper.
5.1 amplifiers are widely used in home theater systems. By combining with projectors, TVs and other equipment, a theater environment with excellent audio-visual effects can be created. In addition, for music lovers, a 5.1 amplifier board is also an indispensable device that can not only maximize the effect of music, but also allow people to experience the charm of music in an immersive way.

What is a 5.1 amplifier board?

5.1 Basic parameters of the amplifier board

Working mode: Class D
Quiescent current: 50mA
Working efficiency: 90%
Rated output power: 2200W+400W Frequency response: 20Hz to 20KHz Working voltage: DC24V-42V( Recommended voltage: DC42V Maximum output current: 10A PCB size: 114109MM
Potentiometer center distance: 21.5MM 21.5MM 21.5MM from left to right
Original TPA3223 is used

TPA3223 2.1 Digital Bluetooth 5.1 3034 Amplifier Board


1.The front input capacitor and interstage coupling capacitor use ELNA BP capacitor 10UF, the electrolytic capacitor signal main circuit uses Taiwan famous brand, and the main filter capacitor uses imported electrolytic capacitor 1000UF , ensuring strong and continuous power support.
2.The resistors are made of high-precision chip resistors, and the main circuit uses a five-ring metal film resistor with an accuracy of ±1%, which ensures a good signal-to-noise ratio for the whole machine.
3.The PCB uses a 1.6mm thick double-sided board, 2.0 ounces of copper thickness, and a full tin-spraying process to ensure good passing performance of large and small currents.
4.The fully enclosed dust-proof potentiometer is used, which has more stable performance and is more durable than ordinary potentiometers.
5.The red-gray ring high-current inductor and the fully shielded audio-specific output inductor are used to ensure a crisp and powerful sound.
The Bluetooth uses Qualcomm QCC3034 5.1 version Bluetooth module

5.1 amplifier board

5.1 amplifier board of working principle

  1. The core function of the amplifier board is to increase the amplification factor of the signal while protecting the circuit from damage. The amplifier board is usually used for isolation and current amplification between the programmable logic controller (PLC) and the input device or output device to improve the load capacity of the PLC and protect the PLC from faults such as overvoltage, overload, and load short circuit.
  2. The working principle of the amplifier board is based on the amplifier circuit, using electronic components with amplification characteristics, such as transistors. When the tiny current at the input end changes, a large current change will occur at the output end, and the change at the output end is several to hundreds of times greater than the change at the input end. The characteristic of this amplifier circuit is that only one potential point is amplified, and the other potential point is grounded by default. In addition, the integrated circuit (IC) is also an important part of the amplifier board. It integrates many transistors, resistors, capacitors and other components on a small piece of semiconductor silicon single crystal, and uses isolation technology to insulate them from each other in electrical properties, thereby realizing signal amplification and processing.

For example, an analog signal amplifier board can connect multiple sensors, collect differential signals and amplify them to the required multiples through an amplifier circuit. The board can work normally in the temperature range of -15℃ to 70℃, and the humidity can reach 90%, which is suitable for various harsh environments. This amplifier board is widely used in industrial automation, smart home, medical equipment and other fields to ensure stable signal transmission and processing

5.1 amplifier board of working principle

The role of the amplifier board

The main functions of the amplifier board:

  1. This is because some process control equipment such as proportional valves can only receive analog voltage or current signals. Therefore, in order to ensure that these devices can correctly receive and respond to the signals sent by the PLC, an intermediate amplification link, namely the amplifier board, is required.
    It can properly amplify the signal output by the PLC D/A module to make the proportional valve work normally.
  2. The amplifier board is also called the IO relay board. Its main functions include isolation, current amplification, and providing additional I/O channels. It can improve the load capacity and reliability of the PLC system and prevent the PLC host from being damaged due to overvoltage, overload or load short circuit. ‌
  3. The amplifier board is widely used in the field of industrial automation. It can not only improve the load capacity and reliability of the PLC system, but also protect the output or input points of the PLC.
  4. The amplifier board can save cabinet space, increase installation speed, facilitate maintenance and replacement, and has protection circuits and built-in insurance, which makes it difficult to damage the amplifier board itself and the load.
  5. The amplifier board can also play the role of amplifying interference, because its input and output are photoelectrically isolated, and the PLC will not be burned out due to high-voltage impact load.
    These features make the amplifier board play a vital role in industrial automation systems.

Application of 5.1 amplifier board

5.1 channel amplifiers are mainly used in home theater systems to provide surround sound audio output and an immersive listening experience for the audience. ‌
5.1 channel amplifiers are an indispensable component of home theater systems. They can provide five full-band channels and one low-frequency effect channel. Through carefully designed audio processing, the audience can feel the sound from different directions, thereby enhancing the immersion of movies or concerts.

Application of 5.1 amplifier board

In addition to home theater applications, 5.1 channel amplifiers are also suitable for professional audio systems, such as conference rooms, performance venues, etc., where high-quality audio output is required. ‌In these occasions, 5.1 channel amplifiers can ensure stable signal transmission and high-quality restoration to meet professional-level audio needs. ‌

In short, the 5.1 channel amplifier board provides multi-channel audio output, bringing a more realistic and three-dimensional sound experience to viewers or listeners, playing an important role in both home entertainment and professional applications.

FAQs About 5.1 amplifier board

Does the 5.1 amplifier front panel consist of 6 front panels?

  1. A true 5.1 should have 6 input interfaces (marked as: 5.1IN) and 6 speakers including a subwoofer.
  2. 5.1 is an independent 6-channel amplification and 6-channel speaker restoration, and of course an independent 5.1-channel sound source is required.
  3. The 5.1 speaker requires the amplifier to have an independent 6-channel amplifier. Virtual ring. Winding into multiple channels

How many power amplifiers are there in a 5.1 channel amplifier?
Two situations, the first is 5.1 full-channel power amplification, that is, 6 channels, but in this case the power of the bass channel is small, which can drive 6~8-inch bass, but it can’t drive large ones.
The second is 5-channel power amplification, except for the bass channel, the other channels are power amplified, the bass channel only provides a level signal, and the signal enters the active subwoofer amplifier board to drive the subwoofer, which is more common.

Can the 5.1 channel amplifier board use dual DC?

  1. Ordinary transistor power amplifiers use DC. What do you mean by “using dual DC power”? Does it mean using a backup power supply? … Using a backup power supply is completely possible.
  2. In addition, there are power amplifiers that are powered by [positive and negative symmetrical power supplies]. Such power amplifiers must use DC positive and negative symmetrical power supplies.

Can I make a 5.1 with two 2.1 amplifier boards?


One of them is used for 2.1 (the analog subwoofer circuit is removed as bass amplification), and the other is used for surround channels (remove the subwoofer circuit and change to center). After merging, it is 5.1. The 6 amplification channels must be connected to the 5.1 decoding output.


Can a 5.1 pre-stage board be used with a 2.0 amplifier?
It can definitely be used. The pre-stage board only plays the role of audio adjustment and does not perform power amplification. The input audio signal can be connected to the amplifier after being adjusted and output by the pre-stage board. For the 5.1 channel, just select 2 of the output signals.

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