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Finish for PCB for RF application

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tamzenite

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I have couple question: I am working on a 10GHz RF board. What is the best finish for the PCB, immersion silver, immersion tin, ENIG ...? Also, how would I determine what should be the copper ounces for the stack up?

Thanks
 

tamzenite said:
I have couple question: I am working on a 10GHz RF board. What is the best finish for the PCB, immersion silver, immersion tin, ENIG ...? Also, how would I determine what should be the copper ounces for the stack up?

Thanks
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Silver or gold electrochemical plated (without any nikel between copper and finishing surface).
+3 to +5 microns added to the copper.
 

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