2022-07-06 14:15:18
In the PCB quality inspection, all inspectors need to wear finger cots, which can avoid the adverse effects of fingerprints on the PCB. control PCBA board ，So, what are the adverse effects of fingerprints on printed circuit boards?
Fingerprints will cause a chemical reaction on the copper surface of the board in a very short period of time, resulting in oxidation of the copper surface; obvious fingerprints appear after electroplating, causing serious defects in the appearance of the product.
The bare hand contacting the board before the solder mask will affect the solder mask, resulting in poor adhesion of the green oil, which will foam and fall off during hot air leveling. Touching the board with bare hands will cause the board surface to be dirty and cause poor solderability.
Fingerprints on the wet film or screen printing circuit and the board surface before lamination can easily cause the adhesion of the dry/wet film to drop, and lead to the separation of the plating and plating during electroplating. If it is not standardized and the influence of fingerprints is eliminated, the qualified rate of the product will be damaged, resulting in a long production and processing cycle, a high rate of rework and replenishment, and a low rate of on-time delivery.
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