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Subject:	Yellow smudges on unmasked immersion silver plated area..
From:	Kanaiyalal Patel <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Kanaiyalal Patel <[log in to unmask]>
Date:	Tue, 16 Aug 2005 15:47:38 -0700
Content-Type:	text/plain
Parts/Attachments:	text/plain (19 lines)

Hello fellow Technet members,
We are experiencing yellow smudges on unmasked thermal and ground lines on the  immersion silver plated board. Pictures are on Steve's website.
http://www.stevezeva.homestead.com and click on "Picture Page 2" then look for "Sierra Board.doc".
Wondering if you can provide some clue into what may be going wrong here? Thanks. We are using watersoluble flux with acqueous cleaning. The boards go thru doublesided reflow and no wave soldering.
Regards,
Ken



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