Printplade overfladebehandling: anti-oxidation, tin spray, bly-fri spray tin, immersion guld, immersion tin, immersions sølv, hård guldbelægning, fuld bord guldbelægning, guldfinger, nikkel palladium guld . Lave omkostninger, god svejsbarhed, barske opbevaringsforhold, kort tid, miljøvenlig proces, god svejsbarhed og glathed.
Hasl: Blikspraypladen er generelt en fler-lags (4-46 lag) højpræcisions PCB-skabelon, som er blevet overtaget af mange store indenlandske kommunikations-, computer-, medicinsk udstyr- og rumfartsvirksomheder og videnskabelige forskningsenheder. Det er forbindelsesdelen mellem memory stick og memory slot, og alle signaler transmitteres gennem guldfingeren.
The gold finger is composed of many golden conductive contacts. Because the surface is gold-plated, the conductive contacts are arranged in a finger shape, so it is called "gold finger". The gold finger is actually covered with a layer of gold on the copper clad laminate through a special process, because gold has strong oxidation resistance and strong conductivity. However, due to the high price of gold, most of the memory has been replaced by tin plating. Since the 1990s, tin materials have been popularized. At present, the "gold fingers" of motherboards, memory, and graphics cards are almost all made of tin, and only some high-performance server/workstation accessories will continue to use gold plating, and the price will naturally be high.