PCB circuit board copper hole problem should be how to improve?

In PCB circuit board industry, more than common glass fiber double sided PCB will need to sink copper in hole, make via with copper, become the CLP. But the PCB manufacturers in the process of production after checked occasionally found sink copper hole no copper or copper unsaturated, now small make up briefly describes several reasons for everyone. Causes of hole without copper which are: 1. Dust plug hole drilling hole or coarse. 2. Heavy copper potions have bubbles, copper on the hole not sink. 3. Improper operation, in the process of micro corrosion residence time is too long. 4. Protective layer on hole inside line ink, not electricity, hole without copper after etching. 5. Impact pressure is too large, Design of punching) get too close to the conductive hole Neat disconnect in the middle. 6. Sink copper hole or plate electric after alkali liquid medicine is not clean, parking time is too long, slow bit corrosion. 7. Electroplating potions ( Tin, nickel) Penetration ability is poor. Thick copper circuit board for the causes of hole without copper problems do improve. 1. Easy to produce dust hole ( Such as 0. 3 mm below the aperture containing 0. 3mm) Slag adding high pressure water washing and degumming process. 2. Set the timer. 3. Printing screen and para film instead. 4. The activity of liquid and the effect of shock. 5. Extend the washing time and complete the graphic transfer rules in how many hours. 6. Increase the blast hole. Reduce the board stress. 7. Penetration tests on a regular basis. Then know that there are so many reasons lead to no copper open hole, and each time slice analysis? Whether should go to supervision in advance. Rocket PCB as a professional supplier of PCB circuit boards, focus on high-precision double-sided/multi-layer circuit board, HDI board, thick copper, blind hole buried plate proofing and small batch, high frequency circuit boards and PCB board production. Under the same cost we faster delivery, under the same delivery speed our costs are lower. At present, the Rocket PCB circuit has PCB circuit board production base and technology research and development base, in the domestic several major electronic product design center layout service center, has for more than 2000 customers worldwide rapid electronic manufacturing services.

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