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Immersion Silver - surface problems (need experienced help)

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#74437

Immersion Silver - surface problems (need experienced help) | 24 August, 2015

We have had some test results come back after we were getting poor wetting in our joints, we requested an EDS on our joints from our PCB supplier. They have provided the results and said that it was their fault and will replace.

What I want to know is what elements should be present in an immersion silver pad? - Before soldering.

Our results show: C @1.42%, Cu @ 3.39%, Ag @ 95.1%

Our supplier has said that the "high C element" is the reason for failure. I'm also wondering what high carbon does to a solder joint?

Any thoughts would be much appreciated and any information on Imm.S plate results.

Kind Regards Adam

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#74440

Immersion Silver - surface problems (need experienced help) | 25 August, 2015

Adam, We have very recently experienced poor wetting on immersion silver as well.

I would be very interested to talk to you offline, however I do not see the option to private message forum members.

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#74441

Immersion Silver - surface problems (need experienced help) | 25 August, 2015

Hello, very interesting you can contact me on one of my spare e-mails, Lehvak_6@hotmail.com

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