Hi Technetters:
Now that Leadfree is here or close to, we would like to change the
electrolytic tinlead plating tank to electrolytic tin tank.
I would like to know if the other fab houses have done this and if so which
vendors tin chemistry has a wider window of operation. Are they seeing any
tin whiskers/sliver problems etc..especially if the boards are stored for
few months.
Also it is my understanding that you can mask over this plated tin since it
does not flow. In this case you can totally avoid stripping the tin and tin
levelling.
We currently do offer other finishes including electroless tin , immersion
nickel/gold, silver....
If there are other consideration in making this change I would appreciate
your input.
Franklin, like you I would like to see more fab houses participating but I
would like to remain with technet.
Thanks

Sona Sitapara
Fineline Circuits Inc.

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