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Looking for info about PCB finishing process

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jayasuryan

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Hello All............

Anyone know about PCB finishing process?
Plz its very urgent....

Thanks in advance.........
 

finish pcb

you can go through the book by COOMBS

Printed circuit board - coombs

i am attaching here with the summary of types of surfaces finish

Thanks
 

    jayasuryan

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pcb finish types

Thanks all.......It really helped me a lot
 

types of pcb finish

HASL - cheapest but with environment harmful, basiclly forbidden in US and Euro markets.
OSP - cheaper one with short deposit time
Immersion Tin, Silver - Cheap with reasonable deposit time
Immersion Gold/ENIG - Not cheap but with very good hardness and quality, adequate for most cases
Electrolytic Gold - high price with best quality, merely used for gold finger basically

To save money, some buys choose OSP + selective ENIG, for one side osp save lots of money, for the other side, selective ENIG can protect some import and unwearable parts
 


    jayasuryan

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