Why “Patch Gold” on The Printed Circuit Board

PCB Surface Treatment:

Anti-oxidation, tin spraying, lead-free tin spraying, immersion gold, immersion tin, immersion silver, hard gold plating, full board gold plating, gold fingers, nickel palladium gold.

OSP: Low cost, good weldability, harsh storage conditions, short time, environmentally friendly technology, good welding effect, and stable welding.

Spray Tin: The tin plate is generally a multi-sided (4-46 layer) high-precision PCB production template.

Golden Finger: Many large domestic communications, computers, medical equipment, aerospace companies and scientific research institutions can use connecting fingers as the connection between the memory module and the memory slot. All the signals passed. The gold finger is transmitted. The gold finger PCB is made up of several gold conductive contacts. Because the surface is gold-plated and conductive contacts are arranged like fingers, they are called “golden fingers”. The gold finger is actually a copper plate coated with a layer of gold, through a special process, because gold has extremely high oxidation resistance and high conductivity.

However, due to the high price of gold, more memory is now replaced by tin plating. Since the 1990s, tin materials have become popular. At present, almost all “golden finger PCB production” for motherboards, memory cards and graphics cards are in use. Tin material, only some high-performance server/workstation accessory contact points will continue to use gold plating, and the price is naturally high. As the integration of integrated circuits increases, IC pins become denser. It is difficult for the vertical tinning process to make the thin pad flat, which makes the placement of SMT difficult. In addition, the shelf life of tinplate is very short. Gold board just solves these problems.

XPCB Limited is a manufacturer specializing in the production of high-precision double-sided, multi-sided and impedance, blind buried vias, and thick copper circuit boards. The products cover HDI, thick copper, backplanes, rigid-flex combined, buried capacitance and buried resistance, goldfinger and other various circuit boards, which can meet the needs of customers for all kinds of products.