1. Sinking gold board and chemical board are the same process products. Electric gold boards and flash gold boards are also the same process products. In fact, they are just different names of different people in the PCB industry. The mainland peers are titled, and the golden board and the glittering gold board are more common in Taiwan.

     2. Sinking gold board/chemical board is generally relatively formal name is chemical nickel gold board or nickel -moc -immersed gold board. The growth of the nickel/gold layer is plated in a chemical deposition; gold and gold board/flash gold The plate is generally relatively formal called nickel -plated golden board or flash gold -plated board. The growth of the nickel/gold layer is plated on the way of DC electroplating.

     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 SMT's paste; in addition, the desklife life of the tin plate is short. The gold -plated board just solved these problems:

     1. During the trial stages, the influence of factors such as components is often not welded immediately when the board comes, but often wait for a few weeks or even a month to use it. Lead tin alloy is many times longer, so everyone is willing to adopt. Besides, the cost of gold -plated PCB is almost the same as the lead tin alloy board at the degree of the sample stage. 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.

     2. 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 printing process of the tin paste, it has a decisive impact on the subsequent re -welding quality. Global is often seen in high -density and super small table stickers.

     As the frequency of the signal becomes higher and higher, the impact of the effect of transmission transmission in a multi -plated layer due to the skin tendency effect, the more obvious the impact of the signal quality