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September 2001

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Sender:	TechNet <[log in to unmask]>
Subject:	dimensional stability of substrate material
From:	Gerard O'Brien <[log in to unmask]>
Date:	Thu, 13 Sep 2001 11:33:53 -0400
Organization:	Photocircuits Corporation
Reply-To:	"[log in to unmask]" <[log in to unmask]>
Parts/Attachments:	text/plain (17 lines)

Can anyone tell me if there is a significant difference in dimensional
stability below Tg between FR4 and BT materials, in particular with regard
to HDI applications and laser drilling?

Gerard O'Brien.
Photocircuits Corporation

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