As an important part of modern electronic equipment, PCB board is an information carrier that integrates various electronic components. It has a wide range of applications in the electronic field, and its quality can directly affect the performance of products. In traditional inspection, PCB circuit boards mostly rely on manual visual inspection, and in the inspection process of circuit board manufacturers, it is inevitable that people directly touch PCB circuit boards with their hands.

　　What are the hazards of directly touching the PCB circuit board with your hands? When touching the PCB circuit board with hands, if the special gloves are not worn, finger prints will be left, which will lead to poor scrapping of the PCB circuit board and reduced reliability of the end user. Disadvantages of finger prints in the manufacturing process of PCB circuit boards: 1. The bare hand touching the board before the solder mask will cause the solder mask to fall, resulting in poor adhesion of the green oil, which will bubble and fall off during hot air leveling; 2. In the process of the gold circuit board after the solder mask and before the packaging, touching the circuit board surface with bare hands will cause the circuit board surface to be unclean, resulting in poor solderability or poor bonding; 3. Bare objects touching the circuit board are extremely short The copper surface of the board undergoes a chemical reaction within a certain time, resulting in the oxidation of the copper surface. After a long time, there will be obvious fingerprints after electroplating, and the uneven coating will cause serious defects in the appearance of the product; 4. The wet film or screen printing circuit and the board surface before lamination have fingerprint grease, which is easy to cause dryness. / The adhesion of the wet film decreases, which leads to the separation of the coating and the coating during electroplating. The gold plate is easy to cause the board surface pattern, and the board surface is oxidized after the completion of the solder mask production, and yin and yang colors appear.

　　If the above phenomena are not standardized to eliminate, it will damage the qualified rate of products, the one-time pass rate, resulting in long production and processing cycles, high rework and replenishment rate, low on-time delivery rate, damage to the image of circuit board manufacturers in the hearts of customers, and affect the next time. cooperate. Fingerprints actually refer to the sweat stains on the hands, mainly water, inorganic salts and some grease stains. Therefore, the key for circuit board manufacturers to prevent bare-hand contact with the board is fingerprints: each employee is required to develop a good habit of picking and placing boards; carry gloves and finger cots; be sure to wear gloves in the process of wearing gloves; management leads by example , teach by words and deeds, and establish an image. As a PCB circuit board manufacturer, the above is the harm of "fingerprint" shared by the editor of Honglian Circuit, its causes and avoidance methods. It is necessary to do a good job in the details and cultivate good working habits from top to bottom. This is the "responsibility, Refinement, Efficiency, Win-win", improve the productivity of products, and realize the win-win two-way choice of customers.

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