FPC flexible circuit board can not ignore the impact of fingerprints

FPC flexible circuit board in the process of processing if you do not pay attention to use the finger to touch the circuit board pad, especially the FPC flexible circuit board for surface treatment will cause oxidation, FPC flexible circuit board surface oxidation when splicing components, It is easy to cause shedding and scrapping, because the fingerprints are all sweaty, the ingredients are some inorganic salts and fats, etc., which is easy to cause the circuit board to be paralyzed. What are the hazards of that little finger print?

    1. The finger touches the FPC flexible circuit board to chemically react the copper on the surface of the board in a very short time, resulting in oxidation of the copper surface. After a long time, it showed obvious fingerprints after electroplating, and uneven plating caused serious defects in the appearance of the product.

    2. The contact of the finger before the solder mask with the FPC board surface will result in poor adhesion of the cover film under the solder mask.

    3. In the process of soldering after the solder mask to the pre-packaging process, the bare hand touching the board surface will result in the board surface being unclean and causing poor solderability.

    4, printing wet film or silk screen line and the surface of the film before the film with fingerprint grease, it is easy to cause the adhesion of the dry / wet film is reduced, causing the plating and plating separation during plating, the gold plate is easy to cause the surface The pattern, after the completion of the solder mask production, the surface of the board is oxidized, and a yin-yang color appears.

    If this kind of fingerprinting phenomenon is not prevented, it will cause great damage to the qualified rate of the product. In the production process of FPC flexible circuit board, Kabor Technology strictly requires employees to bring a finger cot to take the board, thus greatly Reduce the rework rate and improve work efficiency.