Barbara Burcham ,

No, but I am interested.

What made you think you had a problem?
How did you detect it?
Where did you see the cracks?
Do they propagate with stress?
Only one PWB source, or many?
Only Polymide?  GIN or GIL or what type poly?
Thickness? 8 layers in .032 or 8 layers in .125?

I use a lot of GIL (the 13949 desigination, not the company name) material,
and would like to look at my cross sections / product for what you are
seeing.

George Franck
Raytheon E-Systems
(703) 560 - 5000 x2648

----------
> From: Barbara Burcham <[log in to unmask]>
> To: [log in to unmask]
> Subject: [TECHNET] Cracked Traces in Fab
> Date: Wed, 24 Sep 1997 17:17:05 -0700
>
>Hey Ya'll...we're seeing what we suspect are internal cracks in traces in
an
>8 layer board.built on polymide. Any ideas as to what could happen in fab
to
>cause this?
>
>Barbara Burcham
>[log in to unmask]

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