Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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PCB Selective Hard Gold / Immersion Gold Finishing without Bus Bar?

2003

Product: Printed Circuit Board Multi-layer Finishing: Need Immersion Gold (3u") and Selective Hard Gold (10u") Finishing. Problem: No bus bar for connecting hard gold areas for electrolytic plating.

Please advise if there is other way to provide the required finishing. I understand there is a way to do the Selective Hard Gold plating first and then do the rest of the finishing later on. However it requires additional photo resist and masking process.

Please advise if there are alternatives or provide more information on how to achieve this dual finishing.

Thank you,

Johnny Lye
- Singapore

Can't the "bus" be on the plating rack? I thought it was relatively easy to make a rack that contacts the top of each terminal finger and then electrolytically plate those terminals from the point of rack contact on down to the end.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2003

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