RE: [SI-LIST] : copper finish/copper oxidation on pcb

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From: Zabinski, Patrick J. (zabinski.patrick@mayo.edu)
Date: Tue Aug 29 2000 - 17:51:47 PDT


Craig,

I suggest you look into OSB (organic S?? B??) coating. It is a
very-thin coating over coppper that effectively vanishes with
any form of heat/chemicals. In this way, it will not oxidize,
leaving your copper clean. Then, a simple spray solution will
remove it.

Sorry I don't know the actual name, but all board vendors we've
deal with offer it, and they'll be able to tell you the details
on how to remove it when desired.

Pat
 
> Hi,
>
> I have an application where I cannot use a solder mask...I
> require that the copper be exposed. My main problem is that
> after board assembly, no matter how careful I assemble to
> boards (wearing rubber gloves, cleaning the copper), smudges
> and slight oxidation occur to the copper.
>
> So, after I assemble a board, I would like to rinse the
> copper with a mild acid that would remove the oxidation
> layer. Does anyone have any experience doing that?
> What/where should I try to procure this acid? Or am I
> offbase in even thinking of using an acid?
>
> Curious,
>
> Craig Deibele
>

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