What Are The Characteristics Of Good Quality PCB Boards?

Oct. 17, 2019

The PCB circuit board is an important electronic component, a support for electronic components, and a carrier for electrical connection of electronic components. After the electronic equipment adopts the printed board, due to the consistency of the same printed board, the manual wiring is avoided, and the electronic components can be automatically inserted or mounted, automatically soldered, and automatically detected to ensure the quality of the electronic equipment. Increase labor productivity, reduce costs, and facilitate maintenance. The judgment of the quality of the PCB board is generally based on the appearance of the judgment, but depending on the experience, the quality of the PCB board is very important, so what are the characteristics of the good quality PCB board? As a PCB Board For Industrial Control Supplier, we will arrange some professional advice for you.


1, 25 micron hole wall copper thickness

Benefits: Enhanced reliability, including improved z-axis resistance to expansion. If this is not the case, there will be blowholes or degassing, electrical connectivity problems during assembly (inner layer separation, hole wall fracture), or failure under load conditions in actual use. IPCClass2 (the standard used in most plants) requires 20% less copper plating.


2, no welding repair or open circuit repair

The perfect circuit ensures reliability and safety, no maintenance and no risk. If it is not repaired properly, it will cause the board to open. Under load conditions (vibration, etc.) there is also a risk of failure, which may cause malfunction in actual use.


3. Strictly control the service life of each surface treatment

Has solderability, reliability, and reduces the risk of moisture intrusion. Regardless of this factor, soldering problems may occur due to metallographic changes in the surface treatment of old boards, and moisture intrusion may result in delamination, inner layers and holes during assembly and/or actual use. Wall separation (open circuit) and other issues.


4. Cladding tolerance meets IPC4101 Class B/L requirements

Strict control of the thickness of the dielectric layer can reduce the expected deviation of electrical performance. When the requirements are not met, the electrical performance may not meet the specified requirements, and the output/performance of the same batch of components may vary greatly.


5. Define the solder mask material to ensure compliance with IPC-SM-840 ClassT requirements

“Excellent” inks for ink safety and ensuring solder mask inks meet UL standards. Inferior inks can cause adhesion, flux resistance and hardness problems. All of these problems can cause the solder mask to detach from the board and eventually lead to corrosion of the copper circuit. Poor insulation properties can cause short circuits due to unexpected electrical connectivity/arc. For example, Embedded Active Components PCB should meet this requirement in order to achieve its role.


6. Define tolerances for shapes, holes and other mechanical features

Strict control of tolerances can increase the dimensional quality of the product – improved fit, form and function. Failure to do so can cause problems during the assembly process, such as alignment/mating (the problem of press-fitting the needle is only found when the assembly is complete). In addition, there is a problem in mounting the base due to an increase in dimensional deviation.


7, the thickness of the solder mask, although the IPC has no relevant regulations

This improves electrical insulation properties, reduces the risk of flaking or loss of adhesion, and enhances the ability to withstand mechanical impact.


Rigid Flex PCB Design


Rigid Flex PCB Design


The above is a part of the introduction of the characteristics of good quality PCB boards that we introduce to you. Of course, there are many features of good PCB boards. If you have PCB requirements, you can contact us. We include PCB board and Rigid Flex PCB Design. Welcome everyone to come and buy.

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