PCB News - How much do you know about the final quality inspection of PCB circuit boards?

How much do you know about the final quality inspection of PCB circuit boards?

The final quality inspection of PCB circuit boards, or FQC, is the last inspection process of PCB circuit boards. Full-time inspectors are responsible for a comprehensive inspection and measurement of the finished PCB circuit boards before shipment, and record them and put them in storage. Its main purpose is to prevent substandard products from flowing into the hands of customers, and causing unnecessary losses to customers. Ensure that the manufactured products meet customer requirements, provide customers with quality-assured products, and at the same time give customers a sense of trust.
The final quality inspection scope of PCB circuit board manufacturers includes the inspection of defects in all processes, such as poor drilling, poor plating, poor solder mask, poor characters, poor appearance, etc., and engineering measurements, such as board thickness, V-cut Remaining thickness, size, depth of control, etc. Today, I will take Shenzhen Changdongxin Circuit Board Co., Ltd., a PCB circuit board manufacturer with 12 years of rich experience, as an example. "Due to factors such as the production environment, operating specifications, etc., PCB circuit boards may have a lot of small problems during the production process, so FQC needs to do a comprehensive inspection, but based on my years of experience, there are 8 common defects... these needs Focus on inspection, as long as the control is well controlled, there will generally be no serious quality problems." FQC supervisor said. The editor organizes 8 common defects as follows:

1. Board edge burrs;

2. The solder mask is wrinkled;

3. Blistering/delamination of solder mask;

4. Holes in the PTH hole wall;

5. The solder mask is inserted into the metallized hole;

6. The gold surface of the nickel-gold plate is rough;

7. Color difference of solder mask ink;

8. The solder mask does not register the holes.

Of course, the problems that may arise in the PCB circuit board industry are definitely more than the 8 points mentioned above. There are still many problems that may arise. I will not sort out one by one here.
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