Why is there gold in circuit boards

Answers:
Two main reasons, firstly it's noncorrosive, secondly for it's properties in the electrical conduction area.
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Relevant answers:
  • How much gold is in a circuit board?
    Very little. Some gold-plating is barely a tenth of a micro-metre (0.000005 inches) thick, and when you look at the small area that's actually plated... It would be extremely unusual to find a...
  • How much gold in circuit board?
    zero but there is probably copper
  • How much gold is in printed circuit boards?
    Typically very less. Selective gold plating is done in PCBs usually on certain pins, mounting holes, edge fingers or guide rails for specialized applications. The amount of gold plated is very less...
  • Where is gold located on a circuit board?
    gold is applied as a micro-thin layer over the entirety of the circuits to protect them from oxidation. Gold is not on "the entirety" of the board, just the connector contacts. The rest of the copper...
  • How much gold is in a normal pc circuit board?
    almost none there is a small amount used in the links but its like 0.02 grams or something

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