4 Layer Prototype Golden Finger PCB with UL US&Canada

4 Layer Prototype Golden Finger PCB with UL US&Canada

♦ What's Golden Finger PCB?

Golden Finger PCB refers to a printed-circuit board whose edge carries a row of gold-plated contact pads. These pads (the “fingers”) are inserted into a mating connector to provide a low-resistance, corrosion-free, high-wear path for power and high-speed signals between boards or sub-systems.

♦ Key Points of Gold Finger PCB?

1. Structure

• Located on the board edge; can be single- or double-sided
• 3–6 µm nickel under-layer + 30–100 µin (0.75–2.5 µm) hard gold (Au-Co or Au-Ni alloy)
• 20°–45° bevel is normally ground on the tip to ease insertion and reduce abrasion

2. Function

• Acts as a pluggable edge connector that can survive ≥1 000 insertion/removal cycles
• Provides excellent conductivity (<10 mΩ contact resistance) and long-term oxidation resistance

3. Typical uses

RAM modules (DDR4/DDR5), graphic cards, PCIe cards, disk-drive carriers, industrial backplanes, USB sticks, smart-card sockets—any application where a sub-board must be quickly and repeatedly connected to a motherboard or backplane

4. Manufacturing note

After solder-mask, only the finger area is exposed; nickel is electroplated first, then hard gold; finally the edge is bevelled. The rest of the board can receive any normal surface finish (ENIG, OSP, etc.)

♦ Technical Parameters

♦ One-Stop PCBs Solution

PCB Prototype	Felx PCB	Rigid-Flex PCB	Aluminium PCB
Heavy Copper PCB	HDI PCB	High Frequency PCB	High TG PCB

♦ Advantages of DQS Team

1. On-time Delivery:

• • Owned PCBA factories 15,000 ㎡
  • 13 fully automatic SMT lines
  • 4 DIP assembly lines

2. Quality Guaranteed:

• • IATF, ISO, IPC, UL standards
  • Online SPI, AOI, X-Ray Inspection
  • The qualified rate of products reach 99.9%

3. Premium Service:

• • 24H reply your inquiry
  • Perfect after-sales service system
  • From prototype to mass production