6 Layer Gold Finger Fr4 Black PCB Printed Circuit Boards

6 Layer Gold Finger Fr4 Black PCB

Gold finger pcb sample:

Material:Fr4

Layer:6

Board thickness:1.18mm

Surface finish: immersion gold

Copper weight:0.5OZ

Black solder mask ,white silkscreen

Special: BGA+Gold finger,0.12mm laser hole

Certificate: UL, ISO 9001, ISO 14001

Gold finger concept:

Gold Finger is a gold-plated terminal of a card-edge connector,  they may be normally applied for inserting this PCB into yet another installation as a connection. They may be generally being produced as “PCB gold finger chamfer”; the common degree is 30 or 40. In prototype PCB production, gold fingers are typically getting produced without chamfer when the receiver doesn’t know what it. Due to the fact for proto PCB order, if you require the chamfer and PCBs are not, you are able to mull by hand.

Gold finger is the computer hardware such as: (between memory and memory slots, graphics and graphics card slot, etc.), all the signals are transmitted through the gold finger. Goldfinger by a number of conductive gold contacts, because of its surface gold-plated conductive contacts and arranged like a finger, so called "Goldfinger." Actually goldfinger is covered with a layer of gold in the CCL through a special process, because the oxidation resistance of gold is extremely strong, and the conductivity is also very strong.

The way of clean oxide layer of gold finger:

We all know that our computer with a long time using,will have a little dust inside, and sometimes the computer does not light up, take out to wipe the memory or the graphics card and bright fingers,then will light up.

When you remove the graphics card or memory, you will find the golden finger is not so shiny. Why?

That is because the memory / graphics card  long-term exposure to air, gold finger surface produced an oxide layer

There are several tools for removing oxide layers:

1: rubber(the rubbers that pupils used)

2: pencil (the carbon composition inside the pencil  is conductive, after wiping the finger has a better conductive contact).

3: a small cotton ball dipped in anhydrous alcohol (cotton with a moderate alcohol back and forth wipe the finger, dry completely and then use).