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Reply To: | TechNet E-Mail Forum. |
Date: | Mon, 8 Jun 1998 11:34:14 -0400 |
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Jim,
We have seen it in GIL-style Polyamide. There are filler materials that are
put into the "fill" area where the copper was removed. The process was used
a lot when CIC is used with polyamide base material. The prepreg flows and
coated the material, and the filler makes the 'filled' area less brittle.
I have only bought boards like this. Personally never built boards using
it. Don't know the parameters. The filler material might be a Ceramic.
May not work in Cyanide. I can't think of any other disclaimers. Good
Luck!
George Franck
Raytheon Systems
Falls Church Virginia
"My Opinions are just that."
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From: James A Larson <[log in to unmask]>
To: [log in to unmask]
Subject: [TN] Radial Cracks on Cyanide Ester resin
Date: Mon, 8 Jun 1998 15:42:01 +0100
Has anybody experienced Radial Cracking as viewed from a
horizontal section or Fishscale cracking as viewed from a
vertical section using Cyanate Ester Resin. This resin system
is used to fill a 2 oz. copper plane layer in a 8 and 10 layer board.
If so what parameters have you compensated for to help
minimize this situation?
We've modified press parameters and drill parameters with
minimal success.
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