China Cheap price Metal Core Pcb Sample Prototype - 8layer Hard gold main board | YMS PCB – Yongmingsheng

        Nickel: Hard Gold

  ▪ Usual thickness: 0.7 µm (0.00003”) to 1.3 µm (0.00005”) gold (99.7%) over 5.0

  ▪ µm (0.0002”) nickel or 0.2 µm (0.000008”) to 0.3 µm (0.00001”) gold (99.7%) over

  ▪ 5.0 µm (0.0002”) nickel for a solderable surface

  ▪ Very good for corrosion resistance

  ▪ Rated at 130-220 Knoop hardness

  ▪ Very good wear resistance

  ▪ Excellent for surface rotary switches, on-off contacts, and edge connectors

  ▪ Very good shelf life


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