Suggestions on improving pcb scratch

First, you need to confirm the cause of scratching or hanging. For the problems of machines and equipment, you need to seek the help of public works to find the causes and solve and improve them.

If it is caused by personnel operation, it is standard operation and there is no better way to solve it.

In the production process, human factors are the most likely to cause defects, and people are the most unstable and difficult to grasp.