During July 8th to 10th, Best Technology had an exhibition at the Electronica China 2024, and now, we are so excited to share that we had an incredible time! It was our first time at this event, and we believe it is not the last time.
It is must to say that the Electronica the perfect place for us to show off our cutting-edge PCB products. Our booth was buzzing with visitors curious about our advancements in metal core PCBs, ceramic PCBs, flexible PCBs and PCB design. We were thrilled with the positive feedback and the high interest in what we had to offer.
The exhibition wasn’t just about our products; it was also about making meaningful connections. We got to chat with industry experts, potential clients, and fellow exhibitors, discussing the latest trends and exploring possible collaborations. These conversations were incredibly valuable, and we’re excited to keep these relationships growing.
At this exhibition, Best Technology also attracted the attention of authoritative media such as CCTV (China Central Television). It is a big and famous media in China. CCTV reporter visited our booth and conducted an interview with our founder, Peter. During the interview, Peter introduced the company’s latest products and technical advantages in detail, and shared the successful experience and future development plan of Best in the industry.
We want to send a huge thank you to all the friends and visitors who stopped by our booth. Your support and interest mean so much to us. Your enthusiasm for our products has motivated us to keep pushing the boundaries and coming up with even better solutions.
If you didn’t get a chance to see us at Electronica China 2024, don’t worry! We’ve got more exciting exhibitions lined up. You can catch us at PCB West in October and in Munich, Germany in November. We can’t wait to meet more industry pros and show off our latest innovations at these events.
Best Technology’s debut at Electronica China 2024 was a big success. We’re so grateful for the opportunity to share our products and connect with the industry community. Thanks again to everyone who visited our booth. We look forward to seeing you at our upcoming exhibitions!
On July 3rd, 2024, we had India customers visit our office and factory. All our staff of our customer warmly welcome the guest from afar.
Our sales manager Peter, along with Connie and Marina, gave a detailed introduction to our main business and product expertise. They talked about our strict quality control, careful selection of PCB board materials, advanced production equipment, and mature manufacturing processes. Our guests seemed quite impressed with how thorough we are in ensuring top-notch quality.
Actually, we’ve been working with this customer for several years now, and it’s been a fantastic journey of building trust and collaboration. This visit was a great chance to dive into a new PCB project and show off our latest innovations, including electric heating films, ceramic PCBs, and bendable aluminum PCBs.
When checking the sample books, the customers specially mentioned the blind vias and checked the related products for many times. It looks like they are extremely interested in this technology. You know, blind vias, buried vias, through hole vias, micro vias and thermal vias are always our strengthens.
Next day, Connie will be taking our guests on a tour of our metal dome and dome array factory. It’s always exciting to show our partners the heart of our operations and let them see firsthand the dedication and precision that goes into our work.
Best Technology is a one-stop PCB and PCBA service provider in China and Vietnam. “High mix, Low-Middle Volume, High Quality and Fast Delivery” is our advantages. Custom PCBs available in our company as well. You can get high-quality PCB board and PCBA at a very transparent price. For more information, feel free to contact us at any time.
Nowadays, LED lighting has become increasingly popular in our daily life. With its rapidly rise in popularity, the term LED PCB has become commonplace. LED PCB also referred to as LED circuit board, LED aluminum PCB, or simply LED PCB board. Today, our team will share some informational knowledges about LED PCB circuit board, let’s keep reading if you are interested!
What is a LED PCB Circuit Board?
A LED PCB circuit board is a unique type of board crafted to hold and connect light-emitting diodes (LEDs). They are specially designed for lighting applications, like LED car headlights, pool lighting, UV LED, hotel lighting, grow light, high bay lights, stair lights, supermarket lighting, street light, etc. They are used almost everywhere. These boards provide the support and connections needed for LEDs to function efficiently and last longer. They are crucial in areas like lighting, automotive, and electronics, thanks to their ability to manage heat effectively and enhance the lifespan of LEDs.
What are the Different Types of LED PCB?
LED PCB boards are preferred over traditional lighting methods like fluorescent and incandescent bulbs. There are in total five types of LED PCBs, each designed for specific applications:
Aluminum based LED PCB
An LED PCB board, often made of aluminum alloy, serve as the base for mounting LEDs. This is the most common type of LED PCB, since it has good thermal management and cost-effective compared to other materials. The thermal conductivity of aluminum can be 1.0-3.0W/m.k, it can meet the almost heat requirements of low-middle power applications, like streetlights and floodlights. Additionally, Best Technology developed a new product called semi-flexible aluminum PCB for specific device. It can be bent and folded when necessary.
Copper core LED PCB
Copper core LED circuit board can be divided into two types: normal copper core LED PCB and thermoelectric separation copper-based LED PCB. The copper material has higher thermal conductivity than that of aluminum, and it can up to 400W/m.k when made by thermoelectric separation technology. Copper based LED PCB board commonly used in high power devices like new energy vehicles.
Ceramic LED PCB
Ceramic LED PCB boards are made from ceramic substrates like aluminum oxide (Al2O3) or aluminum nitride (AlN). They have superior thermal management, and it can withstand extreme environment when used in high-temp and low temperatures. Ceramic substrates can handle high power and thermal cycling better than other materials, making them ideal for automotive, aerospace, and high-power LED applications.
FR4 LED PCB
FR4 LED PCB boards are made from woven fiberglass cloth with an epoxy resin binder, which provides good mechanical strength and insulation properties. FR4 is a widely used material for general-purpose PCBs due to its cost-effectiveness and versatility. While it has lower thermal conductivity (around 0.3W/m.k) compared to aluminum or copper, FR4 LED PCBs are suitable for low to medium power applications where thermal management is less critical. These PCBs are commonly used in consumer electronics, LED displays, and indoor lighting.
Flexible LED PCB
Flexible LED PCB boards are constructed using flexible plastic substrates like polyimide or polyester. This flexibility allows the PCBs to be bent, folded, and shaped to fit various applications. Flexible LED PCBs are ideal for products that require dynamic or complex designs, such as wearable electronics, flexible displays, and medical devices. Despite their lower thermal conductivity compared to rigid PCBs, flexible LED PCBs offer unique design advantages and are increasingly used in innovative LED applications.
What are the Benefits of Using Aluminum LED PCB Boards?
Aluminum LED PCB boards offer numerous advantages that other materials cannot achieved.
1. Better Heat Management: LED PCBs, particularly aluminum ones, help in cooling LEDs, preventing overheating and extending their lifespan.
2. Compact and Light: These boards are small and lightweight, making them perfect for applications with space and weight constraints.
3. Dimensional stability: Aluminum LED PCB board has good dimensional stability compared with flexible LED PCBs. And it has low CTE during the manufacturing.
4. Cost-Effective: Producing aluminum LED PCBs is relatively affordable, making them a budget friendly option for various applications.
5. Versatile: Available in different shapes and sizes, Aluminum LED PCBs can be customized to meet specific needs, enhancing their usefulness in various scenarios.
The Structures of a LED PCB Board in Manufacturing?
A LED PCB is similar to traditional rigid board, the only one difference is the LED mounting on the pads. Herein, we listing the basic composition of a LED pcb board, let’s see it together.
1. Substrate – The base of the PCB, which can be flexible (like polyimide), metal alloy (aluminum, copper), or ceramic, depending on the required thermal performance.
2. Copper foil – A thin layer of copper is used for forming the circuit paths on the PCB.
3. Solder mask – This is a protective layer covers the copper paths to prevent oxidation and short circuits. It also aids in SMT (surface mounted technology) soldering.
4. Silkscreen – Used to print labels, logos, vendors, symbols, and pick and place on the PCB for easy identification during assembly.
5. Adhesives – Aiming to bond different PCB layers, different material used different adhesive, always are prepreg (PP).
6. LEDs: The main components mounted on the PCB, available in various sizes, colors, power ratings, voltages and so on.
Your Reliable LED PCB Board Manufacturer – Best Technology
Best Technology stands out as a leading manufacturer of high-quality LED PCB boards. We offer a wide range of products and services to cater to various needs. With extensive experience and expertise in the industry, we are committed to providing reliable and cost-effective solutions.
Advanced Facilities
We are equipped with advanced machinery and technology, ensuring precision and efficiency in production.
Experienced Team
Our skilled professionals are dedicated to delivering topnotch LED printed circuit boards. Most of our core members has more than 10 years-experience in the PCB manufacturing.
Quality Assurance
We have passed ISO9001, ISO13485, IATF16949 certifications, and integrated them into our daily manufacturing process. These strict quality control measures can make sure every product meets the highest standards of industry.
Customization
We offer tailored customized LED PCB board solutions to meet customer specific requirements.
Competitive Pricing
Best Technology has our own factory in China and Vietnam, we can provide most affordable solutions without compromising on quality.
Choosing Best Technology means opting for excellence, reliability, and superior service. Partner with us for your LED PCB needs and experience the difference we bring.
When designing high-speed PCBs, several critical factors must be considered to ensure optimal performance. These include signal integrity, impedance control, and minimizing electromagnetic interference (EMI). Below is an ultra high speed camera PCB solution made by Best Technology:
An ultra-high-speed camera rigid-flex circuit board
[1]: XCKU060 chip
[2]: 20A maximum current
[3]: Four DDR4 channels
[4]: 20 layers PCB
Camera PCB design considerations:
1. When the Camera adopts a connector: when the MIPI differential signal passes through the connector, the adjacent differential signal pairs must be isolated using GND pins; If it is not convenient to punch holes, the spacing between the difference pairs is at least 15mil.
2. If there is a reserved test point for the Camera connection seat, it should be close to the connection seat, and the Stub on the cable should be as short as possible.
3. Decoupling capacitors of AVDD/DOVDD/DVDD power supply need to be placed as close as possible to the Camera connection base.
4. The Camera layout needs to be far away from high-power radiation devices, such as GSM antennas.
5. CIF/MIPI and other signals, if there is a board to board connection through the connector, it is recommended that all signals be connected with a certain resistance value (between 2.2ohm and 10ohm, depending on the SI test), and reserve TVS devices.
Best Technology offers one-stop solutions for our values customers. And we provide free technical support for our customers. If you have similiar requirements, welcome to contact us at any time!
A high-speed circuit handles signals that switch quickly or operate at high frequencies, typically above 50 MHz, though some advanced systems may go into the GHz range. Best Technology is a one-stop PCB manufacturer that covers pcb design, pcb layout, pcb diagram, DFM, SI, PI analysis, PCB manufacturing and so on. In the following, you can see a high speed pcb design solution for industrial switch that we cooperated with our customer.
32 x 400GE industrial switch
[1]: Marvell-400G chip
[2]: 200A maximum current
[3]: Single pair differential line 56G optical network
[4]: 24 layers high power PCB
What’s the Best Material for High-Speed PCB Design?
Choosing the right material is vital for maintaining signal integrity and achieving optimal performance. The material impacts the board’s dielectric constant (Dk), loss tangent, and overall signal quality. Common materials include:
FR4: Widely used but not ideal for very high frequencies due to higher loss tangent.
Rogers (RO4000 series): Preferred for high-speed designs thanks to its low dielectric constant and loss tangent.
Teflon: Excellent for high-frequency applications but more expensive and harder to process.
Selecting the appropriate material ensures the PCB can handle high-speed signals without compromising performance.
For the PCB design service, we can make sure the one-time success to save much time and money for customers. Our goal is to work with customers together and win more market with our clients. Just feel free to contact our technical team if you have similiar designs.
Best Technology, a China-based PCB & PCBA manufacturer will be exhibiting at New-Tech 2024 in EXPO Tel-Aviv, Israel at booth No. 66 from May 28, 2024 to May 29, 2024(Western Time). Actually, we have participated in such exhibition for several years. At our exhibition booth, attendees will be able to learn more about our company for PCB manufacturing and PCB assembly technology. Here are some pictures for your reference.
For interested professionals, Best Technology had on hand experts to offer detailed insights and experience on PCB assembly, covering PCB prototype and low/high-volume production. For more information on PCB assembly and fabrication, welcome to visit our booth.
You will see 10mm to 1,500 mm flexible circuit board, from 2layer rigid-flex circuit to 50 layers, 1/2 OZ copper to 3 OZ, 0.15mm extra thin FR4 PCB to 30 OZ heavy copper, various ceramic PCBs (thick film, thin film, DPC, DBC, HTCC, AMB, LTCC). Our new products also will be shown in this exhibition, like copper/aluminum busbar PCB, transparent/PI/rubber silicone flexible heating film, semi-flexible PCB, semi-flexible aluminum PCB.
In Best Technology, you will enjoy one-stop service from components sourcing, board fabrication (FPC, PCB, MCPCB, Ceramic PCB) and final assembly with programming and testing and metal dome that is used in conjunction with a printed circuit board, flex circuit, or membrane switch, become normally-open tactile switches. we have four types of metal domes: four legs with size from 5mm-20mm; triangle with size 4mm-12mm; round dome with size 4-16mm, oblong dome with size 3.7mm-58.1mm, and we also make dome with adhesive, named dome array, custom membrane switches also available in Best Tech.
You are warmly welcome to see how we can manage the components wastage and efficiency to help save your time, money and energy.
About New-Tech:
The New-Tech Exhibition is the largest and major exhibition of the Hi–Tech & Electronics in Israel. More than 150 companies, who lead these fields in Israel and around the world, will take part and exhibit in this trade show.
This exhibition shows a comprehensive array of electronic components, production processes, subcontracting services, clean room equipment, electro-optic devices, test equipment, printed circuit boards, industrial materials, computerization solutions, robotics, power systems, RF/microwave technologies, and more. Attendees can explore cutting-edge innovations in development, design, engineering, and procurement across various industries.
It is important to note:
1. Participation in the exhibition is conditional on prior registration, even for invited customers.
2. After registration and before the conference, a code will be sent to the mobile to confirm participation in the conference.
In the PCB manufacturing, we always heard a word – DFM, do you know what is DFM? And how does it affect the manufacturing? Herein, Best Team would like to explain the DFM and its benefits for you.
What is DFM?
DFM stands for Design for Manufacturing. It is an engineering approach focused on designing products in a way that optimizes their manufacturability, testability, and reliability right from the beginning stages of product development.
The goal of DFM is to simplify the manufacturing process, reduce production costs, and improve the overall quality of the final product. This involves considering manufacturing constraints and capabilities early in the design phase to minimize complexities, facilitate assembly, and enhance efficiency in production. By integrating DFM principles, manufacturers and engineers/designers can achieve cost savings, faster time to market, and higher-quality products.
What We Should Considered About Design for Manufacturing?
Design for Manufacturing (DFM) is guided by several key principles aimed at optimizing the design of products for efficient and cost-effective manufacturing processes. Here are five fundamental principles and considerations must know of DFM:
Design
We all know the more complex the design, the greater the risk during the manufacturing. Therefore, keep the design as simple as possible while meeting the functional requirements of the product. Simplifying the design including reduce the number of parts, assembly steps, and manufacturing processes involved, which in turn lowers production costs and minimizes the risk of errors or defects.
Standardization
In the PCB industry, there is an IPC standard to standardized all the elements design in PCB, this involved the line width, line spacing, solder mask thickness, text height and so forth. By using standardized parts and processes, manufacturers can take advantage of economies of scale, reduce lead times, smooth the manufacturing process and simplify supply chain management. Standardization also ensures the interchangeability, repair, and maintenance of products.
Design for Assembly (DFA)
If you are trying to mount some components to keep and enhance the performance of product, then DFA is must to take into account. Arrange components on the PCB layout in a way can minimize signal interference, reduces trace lengths, and simplifies assembly. Placing components strategically can improve signal integrity, reduce electromagnetic interference (EMI), and facilitate automated assembly processes.
Material
Select materials and manufacturing processes that are readily available, cost-effective, and well-suited to the intended application. Consider factors such as material properties, availability, recyclability, and environmental impact when making material choices. Designing for materials involves optimizing designs to minimize material waste and maximize efficiency in material usage.
Testability and Debugging
Design PCBs with features that facilitate testing, troubleshooting, and debugging during manufacturing and assembly. Include test points, debug headers, and built-in self-test (BIST) circuitry to simplify testing and diagnostics. Design PCBs with clear labeling, documentation, and accessibility to aid in maintenance and repair.
What Are the Benefits of DFM Analyzing?
The mainly benefits of using DFM is save cost. You know, when creating a new project, we need put much money and time in designing and prototyping. DFM helps identify potential manufacturing issues early in the design phase, allowing for cost-effective modifications before production starts. By optimizing designs for manufacturability, companies can avoid expensive rework and reduce overall production costs. Statistically, we can save around 170 thousand dollars one year by adopting DFM analyzing (human cost, trail-production cost and repair cost). In addition, DFM offers numerous benefits including:
Reduce potential quality defects
Facilitate production process improvement
Decrease trial production cycles
Quick time to market
Enhanced product quality and stability
Mitigate risks associated with personnel changes
How to Find a Manufacturer with DFM Service?
Finding a reliable DFM manufacturer is essential for ensuring the success of your product development. Best Technology engaging in PCB manufacturing for more than 17 years, and we have many experts that can help to solve and provide PCB solution for you. Meanwhile, we have professional DFM system that can help to quickly diagnose the design exception such as components missing, trace layout, open/short circuit. With our expertise and advanced tools, we ensure that your PCB designs are optimized for efficient manufacturing, resulting in high-quality products that meet your specifications and exceed expectations. Trust Best Technology to be your partner in achieving excellence in PCB manufacturing.
IGBT (Insulated Gate Bipolar Transistor) is a bipolar junction transistor (BJT) with a MOS gate, or we can say that an IGBT module is a combination of BJT and MOS module. Despite its small size, the IGBT chip can control the transmission of electrical energy. It can switch the current 100,000 times within 1 second under an ultra-high voltage of 650 million volts.
What is the Working Principle of IGBT?
IGBT combines the features of a transistor and a switching circuit, making it a new type of electronic component that can control current efficiency. Its structure allows it to achieve current control from turn on to off without generating excessive leakage current, as well as not affecting the operation of other circuits.
The working principle of IGBT modules including two parts – the current control of MOS gate and BJT transistor. When the voltage of MOS gate changes, it affects the conduction of the transistor, thus controlling the flow of current. When the BJT comes into play, it controls the flow of current, so that improve the working efficiency of the IGBT.
(Working_principle_of_IGBT)
How Does A Ceramic PCB Protect IGBT Modules from Overheat?
As you know, IGBT modules have been applied for many years in various industries such as automotive, industrial, aerospace, consumer electronics, and more. However, optimizing the thermal dissipation of IGBT packaging is crucial to enable the modules to operate at higher power conditions. If heat dissipation is improved, IGBT modules can be used in more advanced applications.
You might be wondering how much heat does an IGBT module generate during running? It’s equivalent to the heat produced by 100 electric furnaces. This substantial amount of heat must be dissipated immediately from the IGBT chip, that’s why the ceramic circuit board stands out.
(Ceramic_pcb_with_DPC_technology)
In IGBT modules, ceramic PCBs are placed beneath the IGBT chip, or we can say the chip is assembled on the ceramic circuit board. The ceramic PCB connects and supports the chip, rapidly dissipating heat to the outer package. This method protects the chip from the adverse effects of heat.
Why ceramic PCBs Are Suitable for IGBT thermal dissipation?
Ceramic materials exhibit excellent thermal dissipation and electrical insulation properties. Unlike aluminum metal core PCBs, ceramic PCBs do not use insulation layers that hinder heat dissipation. In the manufacturing process of ceramic PCBs, copper foil is directly bonded to the ceramic substrate under high pressure and temperature (it depends on the different technology and different copper thickness). During PCB manufacturing, IGBT and other components are mounted on the circuit board through assembly technology.
Ceramic materials have extremely high insulation capabilities, enduring breakdown voltages up to 20KV/mm. At present, there are three ceramic materials that can be used for IGBT modules, they are 99% or 96% Alumina (Al₂O₃), Aluminum Nitride (AlN), and Silicon Nitride (Si₃N₄).
The thermal conductivity of alumina PCB is 15-35W/mK, aluminum nitride PCB is 170-230W/mK, and silicon nitride PCB is 80+W/mK. In contrast, aluminum core circuit boards only have a thermal conductivity of 1-12W/mK.
Applications of Ceramic PCBs in IGBT Packaging
Alumina PCBs are the most commonly used circuit boards in IGBT modules due to their lower cost. But if IGBT modules have higher power or precision requirements, AlN ceramic PCBs and Si3N4 PCBs are the most suitable choices. Because they have higher thermal dissipation and thermal expansion coefficients (CTE) close to semiconductors. Since different ceramic substrate has different features, the uses of ceramic PCB should depend on the specific requirements of IGBT modules.
In addition, with the development of Silicon Carbide (SiC) and Gallium Nitride (GaN) materials, they are starting to be used for IGBT chips due to their high-frequency, high-power, and high-temperature characteristics. Maybe in the future, aluminum nitride PCBs and silicon carbide PCBs will be increasingly applied to high-power IGBT modules in high-density three-dimensional packaging.
Common Properties of Using Ceramic Circuit Board
Excellent thermal conductivity and voltage resistance of ceramic substrates.
Copper trace layers has extremely high current-carrying capacity.
Strong adhesion and reliability between circuit layers and ceramic substrates.
Good soldering performance, suitable for wire bonding.
(Ceramic_PCB)
How to Solve the Overheat Issues in IGBT?
Though the ceramic PCB is good at heat dissipation, there still some overheat occasions happened if small power or long-time operation. Here we summarized some solutions for such issues.
1. Clean the heat sink to ensure tight contact between the IGBT and the heat sink.
2. Clean the fan, including the fan blades and lubricate the bearings if needed.
3. Clear the airflow path of the fan.
4. Replace with higher power IGBTs, ensuring the withstand voltage is not lower than the original IGBT’s value.
Above all are the information that we’d shared, welcome to contact us if you want to know more. Best Technology is a historic company which has over 17 years PCB manufacturing experience, here you can enjoy the one-stop ODM & OEM service, one-to-one after sales, quick delivery and high-quality products.
Bus Bar PCBs are a specialized type of printed circuit board (PCB) that stand out from traditional PCBs due to their integrated conductive bus bars. These bus bars are typically made of copper or aluminum and are positioned on the surface or within the PCB. They serve the purpose of connecting electronic components, devices, or connectors and transmitting electrical currents.
Key Characteristics:
Outstanding Heat Dissipation:
Bus Bar PCBs are renowned for their exceptional heat dissipation capabilities. The integrated conductive bus bars efficiently conduct and dissipate the heat generated within the circuit, making them an ideal choice for high-power applications. Whether it’s in industrial electronics, electric vehicles, or solar inverters, this characteristic ensures that electronic components stay cool, enhancing overall system reliability.
Compact Space Utilization:
Space is often a precious resource in electronic devices. Bus Bar PCBs optimize space utilization through their integrated conductive bus bars. Unlike traditional wiring systems that can be space-consuming, Bus Bar PCBs save space, reducing the overall footprint of electronic systems.
Enhanced Electrical Performance:
The integration of conductive bus bars reduces the overall resistance and inductance of the circuit, resulting in improved electrical performance. Lower resistance translates to reduced power loss, while decreased inductance facilitates faster signal propagation. This, in turn, leads to higher efficiency and improved signal integrity.
Conclusion:
Bus Bar PCBs represent a force of innovation in the field of electronics, with their exceptional heat dissipation, space-saving design, and enhanced electrical performance making them highly favored across a multitude of applications. As technology continues to advance, Bus Bar PCBs are expected to play an increasingly pivotal role in the design and manufacturing of electronic systems.
If you have any interest in Bus Bar PCBs or any related requirements, please feel free to contact us. We have been in the field of heavy copper PCB manufacturing and bus bar PCB manufacturing more than 17 years. We are committed to providing you with outstanding products and services. Let’s explore the limitless possibilities of Bus Bar PCBs together, bringing innovation and success to your projects!
Q1: What do the abbreviations DBC and AMB stand for?
A: DBC means “Direct Bond Copper” while full name of AMB is “Active Metal Brazed”. Both abbreviations refer to bonding technology of attaching a relatively thick copper (generally more than 0.2mm) on the ceramic substrates. These two technologies can be used to fabricate metalized ceramic substrates.
Q2: What is the mainly difference between DBC and AMB?
A: The mainly difference is AMB need to braze the copper to a ceramic board by active metal while DBC can directly connect the copper and substrate without any additional materials.
Q3: Which kind of ceramics are suitable for DBC and AMB?
A: DBC technology is suitable for oxide ceramics such as Al2O3 and ZTA. Non-oxide ceramics must be oxidized before they can be bonded to copper by DBC technology. ALN can be made into DBC or AMB ceramics, but Si3N4 only can be used as AMB substrates.
Q4: What is the function of metalized ceramic PCB?
The metallized ceramic substrate needs to carrier and interconnect multiple power semiconductor devices. The resulting electronic components are called power modules or multi-chip packages, most commonly LED packages or semiconductor packages.
Q5: Does AMB can be used with oxide ceramics?
A: Yes, but the effective of DBC technology is better and the cost is relatively lower.
Q6: What is the most important performance need to be considered when design a new ceramic PCB?
A: It depends on the end application of product will be used in. Ceramics are chemically inert substances that are resistant to corrosion, moisture, and high temperatures, making them preferable to organic dielectrics that degrade in corrosive environments. Electrical, thermal and mechanical properties are equally important in the design of a new substrate. Dielectric strength is an important factor to meet the isolation requirements, which should be set according to the standards, specifications and regulations of the target application. Low thermal conductivity is not conducive to the heat transfer between the chip and the surrounding environment. The bending strength and fracture toughness play an important role in prolonging the service life of the substrate under thermal-mechanical stress.
Q7: How to choose a suitable substrate?
A: First, the heat dissipation of power semiconductor devices should be understood. Then, based on the chip and the ambient temperature, the required substrate thermal resistance is calculated. However, the combination of copper and ceramic may not always achieve the desired thermal resistance. For one thing, the isolation voltage determines the minimum thickness of the ceramic. On the other hand, the thickness ratio of copper to ceramic has a great effect on the reliability. Finally, the set of applicable standards will be very limited.
Q8: Are DBC and AMB substrates suitable for high voltage applications?
A: The DBC substrate is ideal for applications with operating voltages up to 1.7 kV. For higher operating voltages, a thicker ceramic layer is required to meet the relevant isolation requirements. Silicon nitride (ALN) is often used because its high thermal conductivity offsets the increased thickness. In addition, resistance to partial discharge is particularly important in this application. Thus, AMB is superior to DBC techniques for this purpose unless the interfacial gap between copper and ceramics can be eliminated.
Q9: Are DBC and AMB substrates copper plated only on both sides?
A: No, both of two technologies can plate copper only on one side. But this is not a standard combination of materials, however, because the resulting flatness of the substrate is critical in multiple applications.
Q10: What are the shapes of substrates?
A: The rectangle is the cheapest and most common shape to produce. Other shapes are also available, but may incur additional production costs.
