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Date: | Fri, 20 Oct 2006 07:37:48 +0100 |
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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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