Hi Jose,
Er is all about the relative proportions of glass and resin.This note which
I hope I have pasted in correctly explains all. The graphs that go with it
have been deleted but they add nothing to this information. We all work
within a range and are unable to change Er by very much. Your local laminate
supplier should be able to certify as required. I won't speak for him but we
take this to be our responsibility over here.
Regards,
Dave Heywood
[log in to unmask]
[[ Microsoft Word 6.0 Document : 3849 in WINMAIL.DAT ]]
 ----------
From: [log in to unmask]
To: [log in to unmask]; Dave Heywood
Subject:      [TN] FAB. Dielectric constant certi