1. Before entering the warehouse, the IQC of the copper-clad board must conduct a random inspection to check for any scratches or exposed substrate on the board surface. If any are found, the supplier should be contacted in a timely manner and appropriate measures should be taken based on the actual situation.

2. The main reason for the scratches on the copper-clad board during the cutting process is the presence of hard objects on the cutting machine table. During cutting, the friction between the copper-clad board and the objects causes copper foil scratches and exposes the substrate. Therefore, the table must be carefully cleaned before cutting to ensure that it is smooth and free of hard objects.

3. The main reason for copper clad laminates being scratched by the drill bit during drilling is that the spindle clamp bit is worn, or there are impurities inside the clamp bit that are not clean. When PCB sampling, the drill bit cannot be grasped firmly, and the drill bit is not up to the top, slightly longer than the set drill bit length. The lifting height during drilling is not good, and the copper foil is scratched by the drill bit tip when the machine moves, resulting in exposed substrate.

a、 The ability to replace the clamp based on the number of times it can be recorded by grabbing the knife or the degree of wear of the clamp;

b、 Clean the nozzle regularly according to the operating procedures to ensure that there are no debris inside the nozzle.

4. The board was scratched during transportation:

a、 When transferring, the transfer personnel lifted too many boards at once, and the weight was too large. The boards were not lifted during transfer, but dragged up along the way, causing friction between the board corners and the board surface and scratching the board surface;

b、 When putting down the board, due to not being neatly arranged, I pushed the board hard in order to reorganize it, causing friction between the boards and scratching the surface of the board.

5. Scratches caused by improper operation during the stacking of plates after copper deposition and full plate electroplating:

After copper deposition and full plate electroplating, when storing boards, due to the stacking of the boards together, when there is a certain amount, the weight is not small. When the boards are put down again, the corners of the boards are downward and there is a gravitational acceleration, forming a strong impact force that hits the board surface, causing scratches on the board surface and exposing the substrate.

6. The production board was scratched while passing through the leveling machine:

a、 The baffle of the grinding machine sometimes comes into contact with the surface of the board, and the edge of the baffle is generally uneven with protruding sharp objects. When passing through the board, the surface of the board is scratched;

b、 Stainless steel transmission shaft, due to damage into a pointed object, scratches the copper surface and exposes the substrate when passing through the plate.

Article sourced from Jiangmen single and double-sided circuit boardhttp://www.yonghongpcb.com/