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Subject:	Re: AW: [TN] Tombstoning and nitrogen
From:	Colin McVean <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Colin McVean <[log in to unmask]>
Date:	Fri, 20 Oct 2006 07:37:48 +0100
Content-Type:	text/plain
Parts/Attachments:	text/plain (54 lines)

Check the values of Isola's 104i product. Their claims not mine!

Colin W.T. McVean M.Inst.C.T
Production Manager
 
Artetch Circuits Ltd
Direct Dial      01903 712926
Switch Board  01903 725365
 
www.artetch.co.uk
 
 
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier
Sent: 19 October 2006 23:57
To: [log in to unmask]
Subject: Re: [TN] AW: [TN] Tombstoning and nitrogen

Woah, colin,
You say "CTE for FR4 is only around 7 below the Tg. Get above the Tg and
it 
rises to around 13/14 on both the x and y axis"--no way.
Below Tg CTE(<Tg,x/y)= 15+/-2 ppm/K, above Tg CTE(>Tg,x/y)= 17+/-2
ppm/K.

Werner

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