16-layer Gold Finger Through Hole Circuit Board Pcb&pcba

At present, many pcb card board has a lot of gold fingers, used to insert the card slot, and the metal spring in the card slot contact conductive similar finger arrangement pad, because this kind of design on the surface of the pad wear resistance and electrical conductivity have higher requirements, it will be plated on the surface of the pad with a layer of nickel and a layer of gold, so it is known as gold finger.

Through the contact between the gold finger and the spring plate in the card slot, the external PCB and the motherboard are interconnected, and it is convenient to remove and replace due to the difference in performance requirements of users. The most common goldfinger designs are found on graphics cards and memory chips inside computers.

Gold finger circuit board gold-plated actually refers to thick gold, hard gold, also known as plug gold-plated, not referring to the whole plate gold-plated, soft board. This kind of gold is characterized by relatively hard, can be plated very thick, pluggable, and many times the gold finger card we hear refers to this type of board.

Hard gold has a better wear-resistant effect, and can ensure that 20000 times of insertion does not affect the quality, and must be more than 5U "gold thickness. However, the hard gold processing technology is relatively complex, and the high gold thickness requires high consumption of more gold salt, which directly causes the cost to be too high.