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　During the ICT test, the test probes are mainly used to contact the test points on the PCBA board, and faults such as short

　　　1. Annular Ring　　Refers to the copper ring that is flat on the board surface around the wall of the through hole. This gr

　　　When the temperature of high Tg printed circuit boards rises to a certain threshold, the substrate will change from "

　The role of the three anti-paint of PCB?　　Conformal paint is a specially formulated coating used to protect circuit boards

　　　1. The process flow of single-sided circuit board is blanking and edging drilling outer layer graphics (full board gol

　　　PCB circuit board sheet introduction: According to the brand quality level from bottom to high, it is divided as follows: