Why do PCB use gold -plated board_Shenzhen StarLight Industrial Development Co., Ltd.

Why do PCB use gold -plated board

source:Other information release time:2023-02-23 Hits: Popular:PCB Assembly company: Share:

　　As IC's integration becomes higher and higher, the more IC feet are dense. The vertical tin spraying process is difficult to flatten the pads of the finely, which brings difficulty to the slice of SMT; in addition, the life of the tinboard board (Sheelf Life) is short. The gold -plated board just solves these problems: 1. For surface stickers, especially for 0603 and 0402 ultra -small table stickers, because the flatness of the pads is directly related to the quality of the tin paste printing process, and the subsequent re -weld quality quality It has a decisive impact, so the whole plate is often seen in high -density and ultra -small table stickers. 2. During the trial system, the influence of factors such as component procurement is often not welded immediately when the board comes, but often wait for a few weeks or even a month to use it. Tinhe alloy is many times long, so everyone is willing to adopt. Besides, the cost of gold -plated PCB is almost the same as the lead tin alloy board during the degree of the sample. But as the wiring becomes more and more dense, the width and spacing have reached 3-4mil. Therefore, the problem of short -circuit gold silk: As the frequency of the signal becomes higher and higher, the impact of the signal transmission in the multi -plated layer due to the skin tendency effect, the more obvious the impact of the signal quality. The skin tendency effect refers to: high -frequency AC power, the current will be concentrated on the surface of the wire. According to calculations, the depth of the skin is related to the frequency

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