Gold Fingers

Gold Fingers (Edge Connector Plating)

Gold fingers are gold-plated connector pads along the edge of a PCB, typically used for plug-in connections such as PCI, ISA, or memory module interfaces.

Requirements

• Surface finish must be ENIG — only with ENIG finish are the fingers gold-plated
• With HASL finish, edge connectors receive HASL plating instead of gold
• Gold thickness options: 1µ" (thin) to 30µ" (hard gold)

Design Guidelines

• Gold finger length: 4mm minimum
• Finger width: 0.5mm minimum
• Spacing between fingers: 0.5mm minimum
• Keep solder mask 0.5mm away from gold finger area
• Beveling (chamfer) is available at 20°, 30°, or 45° angles