7628 is the lowest resin content (%) prepreg generally available (which is
why it's cheaper), and filling 2 oz copper takes a lot of resin. 7628 is
about 40-44% RC, while 2113/2313/2116 are 54-56%, 1080 is 62-65% and 106 is
72-75%.

It's better to do something like:

-----2 oz Cu----
2113
7628
2113
-----2 oz Cu----

than:

-----2 oz Cu----
7628
7628
-----2 oz Cu----


Tim Reeves



-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Parial Swati
Sent: Thursday, July 15, 2004 8:41 PM
Subject: Re: 7628 prepreg?


Why is it that laminate voids are likely with such a combination ?

Regards,
Swati...



****************************************************************************
***
7628 aginst 2 oz copper is not recommended. Possible lamination issues are
likely, i.e. lam voids.

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