FreeLists / si-list / [SI-LIST] Allowed temperature-rising spec. of backplane

[Jia Gongxian <jgxian@xxxxxxxxxx>]

Hi all experts,

Does anyone know the allowed temperature-rising specifications of a backplane 
in general ? I find many people using 10 Centigrade as a rule of thumb, Is 
there any standards mentioned about this, any suggestions or clews will 
welcomed.

Thanks in advance. 

Jia Gongxian

----- Original Message ----- 
From: "Sol Tatlow" <Sol.Tatlow@xxxxxxxxxxxxxxx>
To: <sitaskina@xxxxxxxxx>; <si-list@xxxxxxxxxxxxx>
Sent: Friday, March 04, 2005 3:20 PM
Subject: [SI-LIST] AW: dieclectric material-Isola IS620


> Ma,
> 
> Could it perhaps be that you have a quote on a particular board
> from 2 different PCB manufacturers, each of whom only quotes on
> one of the materials? If this is the case, you won't, of course,
> be seeing just the difference in material price, rather also the
> markup/costs of the individual manufacturer ... this is perhaps
> obvious, but I thought I would mention it, since it is not clear
> how you are making the price comparison, and it does seem a rather
> big difference.
> ____________________________________
> Sol Tatlow, M.Eng. (Oxon)
> ProDesign Electronic & CAD Layout GmbH
> Product Developer
> Albert-Mayer-Str. 16
> D-83052 Bruckmuehl
> Phone: +49 (0) 8062-808-302
> Fax:   +49 (0) 8062-808-333
> Mailto:sol.tatlow@xxxxxxxxxxxxxxxxxxxx
> www.prodesign-europe.com
> ____________________________________=20
> 
> -----Urspr=FCngliche Nachricht-----
> Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] =
> Im Auftrag von ma mu
> Gesendet: Freitag, 4. M=E4rz 2005 02:06
> An: si-list@xxxxxxxxxxxxx
> Betreff: [SI-LIST] dieclectric material-Isola IS620=20
> 
> 
> Hi all,
> 
> I have a question, why Isola IS620 is cheaper( 1/2 price) than =
> nelco4000-13 , although the dielectric constant( 3.5) is kind of same .
> 
> ma
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