Is gold used in circuit boards?

Question

Will gold be used in PCB circuit boards? What kind of surface treatment usually appears?

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Dora 5 years 1 Answer 635 views 0

Answer ( 1 )

  1. Miki
    0
    January 8, 2020 at 9:19 AM
    Is gold used in circuit boards?

    Gold is usually used in PCB surface treatment processes, such as Flash Gold, ENIG, Hard Gold, Gold Finger
    1. Both Flash Gold and Hard Gold use electroplating to form a gold film on the surface of the circuit board pad.
    2. Immersion Gold replaces gold with oxidized metal on the surface of a circuit board through a chemical substitution reaction. This indicates that the processing process has higher accuracy, better conductivity, and solderability, so it has become the first choice for many precision multilayer boards.
    3. Gold Finger is mostly used in products that need to be plugged in and common, such as USB sockets. Because gold is relatively hard, it is not easy to scratch the surface, and the connectivity is better.

    This is the part that uses gold in the circuit board. To facilitate your understanding, the above picture shows the state of these surface treatment processes on the PCB. I hope it will help you.

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