source:Other information release time:2023-05-13 Hits: Popular:PCB Assembly company
As IC's integration becomes higher and higher, the more IC's feet, the closer. The vertical tin spray process is difficult to flatten the pads of the thin, which brings difficulty to the SMT's paste; in addition, the desklife life of the tinboard plate is short. The gold -plated board just solves these problems:
1 For the surface sticker, especially for the 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, it has a decisive impact on the subsequent re -welding quality. It is often seen in high -density and ultra -small table stickers.
2 During the trial stages, 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. combine
Golden is a lot of times so everyone is willing to adopt. Besides, the cost of gold -plated PCB is almost the same as that of lead -tin alloy boards. 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 situation of transmission transmission in a 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.
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