Household Appliance High Quality 8L Gold Finger 5U Immersion gold PCB Circuit Board

Household Appliance High Quality 8L Gold Finger 5U Immersion gold PCB Circuit Board

Multilayer PCB Specification:

What’s the meaning of gold finger in PCB board?

The connecting gold finger is the connection between the memory module and the memory slot, and all signals are transmitted through the golden finger. The gold finger is composed of a plurality of golden conductive contacts. Because the surface is gold-plated and the conductive contacts are arranged like a finger, it is called a "golden finger". The gold finger is actually coated with a layer of gold on a copper clad plate by a special process because gold is highly resistant to oxidation and has high conductivity. However, because of the high price of gold, more memory is currently replaced by tin plating. Since the 1990s, tin materials have become popular. At present, the "golden fingers" of motherboards, memory and graphics cards are almost always used. Tin material, only some of the high-performance server / workstation accessories contact points will continue to use gold-plated practices, the price is naturally high.

Gold Finger: (Gold Finger or Edge Connector) Insert one end of the PCB into the connector card slot, and use the connector pin as the external connection of the pcb board to make the pad or copper contact with the corresponding pin. To achieve the purpose of conduction, and plated nickel or gold on this pad or copper plate of pcb board, because it is a finger shape, it is called gold finger. The reason why gold is chosen is because of its superior conductivity and oxidation resistance. Sex. But because the cost of gold is extremely high, it is only used for local gold plating such as gold fingers.