Archive for the ‘SMT Technology’ Category

What needs to be paid attention during PCBA process?

Thursday, April 16th, 2020

PCB is an indispensable part for any electronic equipment in small toys or computers., etc. The complex interconnection components include resistor, diode and capacitor, which help components work normally in series. In a sense, it is similar to the ‚Äúbrain‚Ä̬†of the system. PCB assembly process must be of no any mistakes. Here are some points that need to be paid attention:

1.Supply chain management: In order to create high quality PCB, the first thing needing consideration is supply chain. For the availability, both quality and price are important, so is delivery time of components.

pcbassembly
pcbassembly

2.PCB layout. The common question during manufacturing stage is pcb layout in minor differences. Even though various types of designs looks the same to outward seeming, the manufacturing processes are different. You need to ensure PCB layout is feasible during manufacturing process.

3.Test-test has to be conducted after PCB assembly. What needs to be done is to design test point. Some tests include:

Micro-section analysis-also referred to as cross section analysis. This test contributes to identifying components fault and thermal-mechanical faults.

pcbassembly
pcbassembly

Solderability test. This test contributes to testing reliability of PCB solder pad, to ensure a firm surface and a reliable soldering point. It also contributes to confirming if storage will have an effect on solder components.

PCB pollution test-This can test many issues, such as corrosion and degradation. Scaling powder residue will result in pollution and thereby case components failure. Pollution analysis is famous for its accuracy and preciseness.

Optical microscope-This can test the issues relevant to PCB and soldering as well as overall pcb assembly. The process is famous for its speed, as it involves using high-power microscope to inspect incorrect structure.

Best Technology specializes in PCB assembly solutions since 2006, and if you would like to know more about turnkey PCB services(one-stop solutions about PCB), contact us anytime.

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Is Automated Assembly Always Better?

Wednesday, December 18th, 2019

As a matter of fact, PCB experts will always know the major benefits of automated assembly processes: reduced errors, increased output and consistent quality, however, is automation always better?

The usage of SMT line machines has become standard practice in PCB assembly and is thought to be more efficient; however, SMT machines are not appropriate for every job. Manual assembly is a better option for assembling boards in low quantities or low-volume orders using components with unique properties.

SMT Machine
SMT Machine
Manual Assembly
Manual Assembly

Volume Limits

Volume can be a determining factor of whether or not to assemble by hand. Orders of 10 or less boards, are often best assembled by hand- for reducing production time and faster turnaround.

Characteristics of Component Choices

The characteristics of chosen components should be taken into consideration before assembly. Careful and potentially time-consuming SMT calibration is required to minimize the risk of damage when using components with:

Heat sensitivity

Unusual shape and center of gravity

Inadequate packaging and/or documentation from the manufacturer

Therefore, low-volume orders using components with unique properties and insufficient packaging or documentation should be manually assembled by a skilled technician.

In general, it is best practice to manually assemble boards with a volume limit of 10 or less, simple technology, and when there are a few individual components per board.

SMT lines are preferred for large-volume assembly because they consistently produce quality PCBs and reduce the possibility of error associated with manual assembly. The key to ensuring quality of manual assembled boards is having a well-defined manual process, which is bound to passing through failsafe quality checks that hold hand and automated orders to the same standards.

Anyway, before starting your project, it is highly recommended that you should consult with your PCB service provider regarding your PCB assembly options.

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How to Choose a Professional PCB Assembly Company

Monday, November 18th, 2019

Hardware designers requiring turnkey PCB assembly services usually face tremendous obstacles for their need of prototyping and small batches. Large companies with huge inventory needs and long delivery horizons can wait for days or weeks for a proposal, while accepting large minimum quantity requirements. For them, delays associated with overseas manufacturing are no big deal. However, these conditions are simply unacceptable for small industries, engineers, makers, and entrepreneurs.

Best Practices of PCB Assembly Vendor

Selecting the professional PCB assembly company at the beginning determines the success of a project. Therefore, picking the right PCB assembly services provider becomes a highly important decision to be made. One must watch out for those offering very low prices, but subsequently are unable to provide the services, record of accomplishment, infrastructure, and technology to back up their promises. Rather, one must insist the PCB assembly services have the essential features, offer the services, and follow business practices such as:

Instant Quotations

Waiting for days or weeks and trading a bunch of emails only to find out the cost of a PCB assembly, is not only a waste of time, it is expensive. A vendor offering instant, online quotations is always preferable. In general, although all vendors will start by sending a quotation for the project, therefore, selecting one who gets the process off painlessly is advisable. Moreover, selecting the vendor who gives an estimate in terms of quantity offtake helps in determining capital needs and product prices.

Prototyping Requirements

Most customers, before placing their order, want to make sure their PCB works exactly as intended. This may require making a few iterations to perfect the design. So far, prototyping was a big challenge under the old manufacturing model. However, Best Technology is willing to handle even a single quantity.

Minimum Order Requirements

Earlier, PCB assembly services were unable to accept production runs of small quantities. Older technology did not allow profitability in smaller numbers, which turned out to be a major challenge for everyone. However, use of modern technologies allows easy combination of small orders into larger ones, while switching from one task to another is no longer a major hurdle. Therefore, professional PCB assembly providers accept all types of order, regardless of quantity, and execute them at reasonable prices.

Seamless Manufacturing

With advancement in PCB assembly technologies, it is no longer necessary to track multiple vendors and suffer long lead times. A modern PCB assembly solution such as the Best Technology, offers a platform to resolve any assembly problems, online and from anywhere and takes over the sourcing, purchasing, and assembly of the components. With this approach, the product can be expected to be available in days.

Looking Beyond PCB Assembly

The PCB happens to be only the first step of the many for most inventions and products and PCB Assembly is an especially non-negligible process. Quality can only be assured by finding a reliable company.

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A Customer’s Visit in Our Surface Mount Technology Plant

Wednesday, April 3rd, 2019

Mike, one of our clients visited our company on April 2 and inspected our surface mount technology plant.

During the tour of the plant, Mike was impressed with the plant operation as all machinery and equipment in good order and the factory employees dedicated to their tasks and were hardworking. Mike complimented our company on both the efficiency of the plant and our hardworking employees.

During the visit, Mike asked about specific process of surface mount technology, as he was overwhelmed by the quantity and operation of the machinery and wished to understand the process better.

The supervisor in charge of the plant explained the entire process to Mike which included the painting with solder paste, the machinery layout and reflow soldering. What Mike thought was really impressive was the real AOT testing and could not help complimenting us on the process.

Mike said that Best Technology was well suited to provide his requirements and would support Best for this. He believed that Best Technology can create greater value to clients as a result of the efficiency of the SMT manufacturing process.

Quality has always been Bests core value, and we prefer to losing quantity rather than compromising quality, and we are dedicated to form reliable relationships with our clients. We are appreciative of Mike’s positive comments about our company and we will continually strive to meet our clients expectation.

To Learn more, please log on https://www.bestpcbs.com/ 

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Welcome Our Customer from India

Thursday, January 10th, 2019

On January 9, 2019, we had a visitor from India. Best Technology thanks for having such an excellent partner.

John talked a lot with our general manager Peter and the members of business development department. John brought the material of SMT for us and hope we can make SMT for him. He was satisfied with our company culture and signed his name on the company cultural wall after the meeting came to an end and we took a picture with the client in the office of Best Technology.

Signed the name on the wall

Signed the name on the wall

Took a picture in the office

Took a picture in the office

After that, in order to know more something about capability in manufacturing of us, a member of business development department–Tiffany accompanied John to visit our SMT and PCB¬†factory. They got¬†an exclusive factory tour of Best Technology‚Äôs factory.

John and Tiffany in SMT factory

John and Tiffany in SMT factory

John and Tiffany in the PCB factory

John and Tiffany in the PCB factory

The client was satisfied with our high-tech equipment during the visiting. As the professional vendor of printed circuit board¬†and PCBA¬†in China, we will always uphold the mission–to provide the most suitable products¬†and the most satisfying service for customers.

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3 Defects of Putting Nitrogen into Reflow Oven

Wednesday, January 9th, 2019

We have talked a lot about the defects of putting nitrogen into reflow oven before. Thus, today Best Technology would like to discuss some defects of putting nitrogen in to the reflow oven with you.

reflow oven

reflow oven

‚ąö¬†Nitrogen¬†is very expensive.

‚ąö¬†If the heating effect is better, there will be tombstone effect happening on the resistance and capacitor. This effect is beneficial to most of components, but it will deteriorate the tombstone effect¬†of the small chip.

‚ąö¬†Besides, the nitrogen will also increase the wicking effect of soldering tin, allowing the soldering paste along the fillet weld of the components to climb to a higher place. Maybe it is good for some fillet weld of components, but it is not friendly for some connectors. Because the fillet weld of connectors is the connected to¬†other components.¬†It will cause other problems if tin flows into these connections. What‚Äôs more, it will lead to short circuit if the tin climb to a higher place as the fillet welds of connectors are very closely.

PCB with components

PCB with components

Best Technology, a professional PCB solution provider, is always dedicated to catch up with times. Our unique technology and high quality products will give you a competitive supply of printed circuit board and PCB assembly and make your wearable devices more excellent. To learn more, contact us at 0755-29091601 or check our website: https://www.bestpcbs.com

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5 Benefits of Putting Nitrogen into Reflow Oven

Monday, January 7th, 2019

The reflow oven is one of the indispensable equipments in SMT. Putting the PCB with components goes through the reflow oven then the solder paste adhering on the printed circuit board will melt. After the solder paste getting cold, the components will adhere to the PCB stably.

Picture of reflow oven

Picture of reflow oven

After you have learned something about reflow oven, have you ever know how to make the reflow oven work better? Here are 3 benefits of putting nitrogen into reflow oven listed as following:

‚ąö¬†It is able to make the surface tension of solder paste get smaller which is good for the components adhering to the PCB more easily.

‚ąö¬†It can decrease the oxidization in a certain. Because the nitrogen is a kind of inert gas which is hard to produce chemical compound.

‚ąö¬†Reducing the rate of void. Because the rate of void decreases with oxidation.

‚ąö¬†Nowadays, some manufacturers also develop to put nitrogen in wave soldering oven. It is able to decrease the speed of oxidation of liquid tin in the bath. As the slag of tin will be formed when the liquid tin contacts with air. After that, the slag of tin will adhere on the printed circuit board. If it happens to the connect between two spots of tin, it will cause short circuit.

‚ąö¬†It can increase the rate of tin feeding of pin components and then they will combine with the printed circuit board firmly.

PCB with components

PCB with components

Best Technology, a professional PCB solution provider, is always dedicated to catch up with times. Our unique technology and high quality products will give you a competitive supply of printed circuit board and PCB assembly and make your wearable devices more excellent. To learn more, contact us at 0755-29091601 or check our website: https://www.bestpcbs.com

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The Application of AOI in Reflow Inspection

Monday, December 24th, 2018

Today, we continue to talk about AOI technology applied in the PCB manufacturing. The component mounting inspection is followed by the reflow inspection, if you would like to know more details, please click The Application of AOI in Component Mounting Inspection to know.

AOI can be divided into two types: preventing problem phase and finding problem phase. The inspections after solder paste printing and SMT belongs to preventing problem phase and the inspections followed by reflow soldering are finding problem phase.

In the back end inspection of reflow soldering, AOI technology is able to detect some problems as below:

‚ąö¬†whether the components are missed, deviated or skewed.

‚ąö¬†The defects of polarity.

‚ąö¬†Whether solder joints are correct.

‚ąö¬†Whether the solder paste is enough.

‚ąö¬†Whether there is short circuit in soldering etc..

The back end inspection of reflow soldering is the most prevailing choice for AOI now. Because all of the assembly errors can be found at this process, so that the quality of printed circuit boards are able to step forward to a higher level.

Best Technology is the premier expert in manufacture of PCB and PCBA. Our unique AOI testing technology and high quality products give you a competitive supply of printed circuit board and rigid-flex circuit board. To learn more, contact us at 0755-29091601 or check our website: https://www.bestpcbs.com/

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The Application of AOI in Component Mounting Inspection

Monday, December 17th, 2018

In the previous articles, we have talked about PCB inspection and solder paste printing inspection. To find more information of the details, please check: The Application of AOI in PCB Inspection and The Application of AOI in Solder Paste Printing Inspection.

The component mounting requires high precision of equipment and the common defects including forgetting to mount the component, mounting the component in a wrong way, polarity reversal etc.. AOI technology not only can find the defects above, but also can check the connection dense spacing and the solder paste on the pads of BGA component.

 

Since the component mounting is followed by the reflow soldering, the testing after component mounting is usually called front end inspection of reflow soldering. However, it is meaningless from the perspective of quality guarantee. Because the defects can not be found in the reflow oven. The solder tin is able to correct by itself after melting in the reflow oven, so the the mounting displacement and solder printing status can not be detected on the substrate after soldering. In fact, the front end inspection of reflow soldering is incredible significant for quality guarantee as that the component mounting of all parts can be inspected before reflow soldering.

The alarm will be sent out if the defects are found by AOI technology. After that, the visual inspection will be carried out by the operator. If miss some components at this stage, it can be corrected by tweezers. After the visual inspection operator repaired the same problem for many times, he will ask the person who charge the production equipment to reconfirm whether the setting of the machine is reasonable. The feedback information is very helpful to enhance the production quality and it can improve it in a very short time.

Best Technology is the premier expert in manufacture of PCB and PCBA. Our unique AOI testing technology and high quality products give you a competitive supply of printed circuit board and rigid-flex circuit board. To learn more, contact us at 0755-29091601 or check our website: https://www.bestpcbs.com/

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The Application of AOI in PCB Inspection

Monday, December 10th, 2018

AOI technology possesses the functions of PCB inspection, solder paste printing inspection, component inspection and assembly inspection after welding. In this article, we mainly talk about PCB inspection.

PCB Inspection

PCB inspection are mainly relied on the visual inspection combined with electrical inspection during the early PCB production. Best Technology, on the other hand, present many benefits of AOI testing to everyone. AOI testing is a popular choice due to the following features:

‚ąö¬†with the development of electronic technology, the wiring density of PCB¬†is getting higher, which increases the difficulties in visual inspection.

‚ąö¬†Decrease the rate of mis-judgement.

‚ąö¬†Able to reduce harm to the health of inspector.

‚ąö¬†Save cost.

‚ąö¬†Avoid the electronic inspection technology can not inspect some defects.

PCBA AOI testing

AOI testing

In the process of printed circuit board manufacturing, there would be some defects on the substrate fabrication and copper clad. However, these defects are mainly produced after etching. By the way, AOI testing is usually used after etching and it is utilized to find out the missing or extra part on the rigid PCB.

Most defects can be found by AOI testing (excluding the missing inspection problem), but the main problem affecting its reliability is missing inspection. The dust produced in the processing of PCB could cause false warning, so the manual inspection must be carried out after using AOI testing to detect the defects.

Best Technology is the premier expert in manufacture of PCB and PCBA. Our unique AOI testing technology and high quality products give you a competitive supply of printed circuit board and rigid-flex circuit board. To learn more, contact us at 0755-29091601 or check our website: https://www.bestpcbs.com/.  After PCB inspection, we will talk about solder paste printing inspection in the next article, if you would like to know more, please click The Application of AOI in Solder Paste Printing Inspection

 

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