Golden Finger PCB

Gold finger PCB is a specialized printed circuit board featuring gold-plated conductive contacts (known as "gold fingers") designed along the board's edge. It is primarily used to achieve reliable electrical connection and signal transmission between devices, and is widely applied in scenarios that demand frequent connections—such as computer memory modules, graphics cards, and server expansion cards.

Specification

• Material: Rogers RO4350B/ RO3003/ RO4003/RO3006/ RT/Duroid 5880/ RT5870 and Arlon/Isola/Taconic /PTFE F4BM/Teflon material etc.

• Layer: 2L/4L/6L/8L/10L/12L/14L/16L/18L/20L/22L/24L/26L/28L/30L

• Dielectric Constant (DK): 2.20/ 2.55/ 3.00/3.38/ 3.48/3.50/3.6/ 6.15/ 10.2
  

Core Features

• High Conductivity: The gold layer reduces contact resistance, ensuring high-speed signal transmission.

• Low Impedance: Reduces signal attenuation, making it suitable for high-frequency applications (such as 5G devices).

• Wear Resistance: The hard gold process can withstand tens of thousands of plug-in and pull-out cycles (such as PCIe slots).

• Corrosion Resistance: The nickel layer resists oxidation and is suitable for humid environments.

• Process Compatibility: Can be combined with other surface treatments (such as immersion gold and tin spraying) to meet diverse needs.
  

Application

• Computer & Communication Industry: Memory modules, graphics cards, PCIe expansion cards, 5G base station cards

• Consumer Electronics Industry: Interface modules for smartphones, interface modules for wearable devices

• Industrial & Medical Industry: Control panels for automation equipment, control components for medical instruments

• New Energy Vehicle Industry: Battery Management Systems (BMS), electronic control modules
  

Common process types of gold finger

• ENIG

  Advantages: Low cost, simple process, suitable for general electronic products.

  Disadvantages: Poor wear resistance, thin gold layer.

• Gold Hard Plating (containing a cobalt/nickel alloy)
  
  Advantages: High hardness, wear resistance, suitable for high-frequency signal transmission (such as memory slots).
  Disadvantages: High cost, requires specialized equipment.
• Gold Plating and combined with processes such as OSP
  
  Advantages: Cost savings, balanced performance and cost-effectiveness.