Enthone-OMI has done some research into this area.  You may wish to give
them a call.
Regards,
Tom Eshelman
[log in to unmask]

----------
> From: tgyee <[log in to unmask]>
> To: [log in to unmask]
> Subject: [TN] Gold Tips Staining
> Date: Friday, November 21, 1997 12:30 PM
>
>         We experienced some staining on the gold tips after the job
passed
>      through the OSP finishing. These are what happened:
>
>      * Before going into OSP line, the gold tips looked perfectly normal.
>      * After OSP, the first tip among the tips row was reddish in color,
>      but all the other tips were OK.
>      * The gold and nickel thickness were well within the sprcification.
>      * The staining did not happened on other jobs.
>      * The particular tip connection was intentionally cut off, then the
>      board was run through OSP again. The same thing happened. This
>      indicated that it wasn't any electrochemical effect.
>
>      Can somebody give me some clue about this problem.
>
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