Hey Jim,

Scoring of Teflon PWAs can be done but care must be taken during
depanelization. You will likely see an ugly edge (exposed fibers, etc.)
unless you use a sharp cutter (I have seen Teflon pass through the
"pizza-wheel" style depanelizers with no effect, the laminate was soft
enough to squish through and not separate). IMHO only tab routing should be
used with exotics (Teflon, Ceramics, etc.) otherwise you will not get a
consistent clean edge and may experience de-lam due to depanelization. Give
me a call if I can muddy the subject up more.
Hope it helps,
FNK

Frank N Kimmey, C.I.D.
Senior PCB Designer
Powerwave Technologies
PH. 916-941-3159
Fax 916-941-3195


-----Original Message-----
From: Marsico, James [mailto:[log in to unmask]]
Sent: Tuesday, May 15, 2001 7:07 AM
To: [log in to unmask]
Subject: [TN] SCORING TEFLON BOARDS


Hello Technet...  a quick question.  Are Teflon boards (Duroid) a good
candidate for scoring?  What would be the best method for panelized assembly
and singulation?
Thanks in advance,
Jim Marsico
Senior Engineer
Production Engineering
EDO Electronics Systems Group
[log in to unmask] <mailto:[log in to unmask]>

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