Hi Technetters,
I am facing a problem with a tin/lead plating board.
I am facing a problem with boards that are of Roger material and was
tin/lead plated.
The traces are not being masked, hence exposed.
We subject the boards to reflow, and those area where no solder joint
turned tarnish.
This is the first time we handle such kind of board. We have no
experience on this.
I wander if tarnish is a defect. Can someone advise me how to remove
this tarnish as I try using IPA to rub it off, it seems nothing
happened.
I could not find this in the IPC.
Please advise me.
Thanks.
KH Poh
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