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May 2002

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Subject:
Re: Board defect? Purple spot
From:
Bill Decray <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 16 May 2002 15:55:34 -0400
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Board defect? Purple spotCould it be the desmear or Permanganate?


*GOD BLESS AMERICA*



William W. DeCray III
Waytec Electronics Corp
CAD/CAM & Engineering Services Manager
PHONE:(434) 237-6391 ext 115
CELL:   (804) 851-6115
FAX:    (434) 237-1324
E-mail:<[log in to unmask]>
Web http://www.waytec.com
FTP  ftp://ftp.waytec.com

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Pelkey, Glenn
Sent: Thursday, May 16, 2002 1:14 PM
To: [log in to unmask]
Subject: [TN] Board defect? Purple spot


Hi all,

        We just spotted a new board level defect, or is it?  It is a small,
about 25 mil diameter circle that is bright purple in color.  We dug one out
and found it goes all the way through the board.  Definitely no glass fiber
in this spot, and it shows some peeling on the edge where it meets the top
of the soldermask.

        So, we have our guess at what it is, but have any of you seen this
before?

Thanks in advance for any input.

Glenn

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