Gold, Silver and Copper in PCB

The PCB is support for electronic components and is a carrier for electrical connection of electronic components, mainly for supporting and interconnecting. From the outside, the outer layer of the board has three main colors: gold, silver, and light red. Classified by price: gold is the most expensive, silver is second, light red is the cheapest. However, the circuit inside the board is mainly pure copper, which is bare copper.Why are there precious metals on the PCB?PCB as a support for electr...

Immersion Silver Immersion Gold PCB CCL

Ranking Name Answers
1 PCBWay Support 6
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