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September 1999

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Subject:
From:
Geoff Layhe <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 8 Sep 1999 15:56:04 +0100
Content-Type:
text/plain
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text/plain (69 lines)
Not sure if this got through first time. If it did apologies for
repeating it. 

> ----------
> From:         Geoff Layhe
> Sent:         08 September 1999 10:10
> To:   [log in to unmask]
> Subject:      RE: [TN] Woh Nelco.............
> 
> Paul,
> I don't have information on N4000-2 but the figures usually quoted for
> Z axis expansion in FR4 laminate with a Tg of 140ºC are 150-200ppm/ºC.
> This is for a measurement range between 50-200ºC. 
> If the measurement range is below the Tg then the Z expansion is
> usually quoted as 30-40ppm/ºC.
> 
> Hope this helps.
> Geoff Layhe
> Lamar-UK
> www.lamar-uk.co.uk
> 
> ----------
> From:         PAUL BROWN[SMTP:[log in to unmask]]
> Reply To:     [log in to unmask]
> Sent:         07 September 1999 19:07
> To:   [log in to unmask]
> Subject:      [TN] Woh Nelco.............
> 
> Does anybody know the CTE Z for Nelco N4000-2, 6 or 13. I checked
> there
> website and unlike the values for x and y the z values are specified
> in
> %. if 3.5% is in fact correct would that not mean  CTE of  3500 PPM??
> Help would be great...............Paul
> 
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