The .4 mils difference is not to bad if you have decent tolerances.  If
your temperature rate of rise is to fast, the prepreg passes through the
gel state faster and does not allow the correct flow.  We maintain a 8
to 12 degree rate of rise to control the flow.

Robert A. Stoppel
General Technology Corp.
505-345-5591 X3068

>-----Original Message-----
>From:  Hinners Hans Civ WRALC/LYPME [SMTP:[log in to unmask]]
>Sent:  Tuesday, June 27, 2000 2:09 PM
>To:    [log in to unmask]
>Subject:       [TN] Scale Flow Test - Question
>
>Hello Cyber junkies!
>
>They just put me in charge of our Drill operation and I have my first
>question.
>
>Our Scale Flow Test for a lot of PGFK 2113 gave us an average thickness of
>3.9 mils instead of the expected 3.5 mils.
>
>What does this mean?
>
>I'm guessing the prepreg either didn't flow enough or gelled to quickly.
>
>I need to figure out if the material is still good or if we just need to
>tweak the board stackup so we don't exceed max tolerance.
>
>Thanks!
>
>Hansie
>
>~~~~~~~~~~~~~~~~~~~
>Hans M. Hinners
>Materials (Process & Manufacturing) Engineer
>Warner Robins Air Logistics Center
>Avionics Production Division
>Manufacturing Branch
>380 Second Street, Suite 104
>Building: 640, Mail Stop: LYPME
>Robins AFB, GA 31098-1638
>Voice: (912) 926 - 1970 Fax: (912) 926 - 7164
>mailto:[log in to unmask]
>http://www.robins.af.mil
>
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