PCBA Products - Golden Finger PCBA

Gold finger (Connecting finger) is an interface used to connect motherboards (such as between memory modules and memory slots, graphics cards and graphics card slots, etc.). All signals are transmitted through golden finger. Golden finger are composed of numerous golden conductive contacts, which are coated with gold and arranged in a finger like pattern, hence they are called "golden finger". The golden finger is actually a layer of gold coated on a copper-clad board through a special process, because gold has strong antioxidant properties and conductivity. The golden finger is shown in the figure below, and the yellow part of the board edge area is the golden finger.

Gold finger is a conductive contact processed by electroplating gold technology. The Connecting finger is tightly integrated with the slot on the motherboard, and the transmission of signals and power is achieved through metal contact. After inserting the graphics card into the motherboard, the gold fingers will correspond to the slots on the motherboard to ensure stable transmission of signals and power.

The advantages of golden finger

1. High speed transmission: The gold finger is processed with gold plating technology, which has excellent conductivity and corrosion resistance, and can support high-speed data transmission to meet high-performance connections.

2. Strong compatibility: The design of the Golden Finger considers motherboard slots of different models and brands, with good compatibility, making it convenient for users to upgrade and replace devices.

3. High stability: Due to the large contact area between the gold finger and the PCBA motherboard, it can provide more stable signal and power transmission, ensuring the normal operation of the display device.

The design requirements for golden finger generally include the following

1. The thickness of gold on a golden finger is generally 0.25-1.3um, and the thickness of gold depends on the number of insertions and removals of the golden finger;

2. The minimum distance between golden finger is 6mil;

3. The design thickness of the gold finger board is 0.8-2.0mm;

4. The maximum height of the golden finger is ≤ 2 inches;

5. The angle for chamfering the golden finger can be 20 °, 30 °, 45 °, 60 °, or 90 °;

6. The minimum distance between the solder and silver pads and the top of the gold finger is 14mil;

7. In addition to chamfering the insertion edge, the chamfering requirements for the golden finger should also include a 45 ° chamfer (1-1.5) or R1-R1.5 fillet on both sides of the insertion board for easy insertion and removal.

As an advanced interface technology, Golden Finger has broad application prospects and market value. iPCB provides customers with gold finger PCBA. Please contact us if needed.