Single Layer PCB - Professional OEM Factory
2021-10-26u2002·u2002One-sided PCB is first produced in the early 1950s with the emergence of the transistor.The main method of producing the one sided PCB is by using copper foil direct etching method. ... Immersion gold/silver PCB.Immersion gold or silver are mainly used for the surface finished of the circuit board, which is used to prevent the copper on the ...
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