Ted & or Mark,
        I hope you realize that those figure will be approx. averages for
differing materials of the general construction type. Don't rely on those
figures too heavily because individual constructions, resins and weaves
could vary those figures significantly (at least 10 - 15%, possibly 20 -
25%).

Brad Velander,
Lead PCB Designer,
Norsat International Inc.,
#300 - 4401 Still Creek Dr.,
Burnaby, B.C., V5C 6G9.
Tel. (604) 292-9089 direct
Fax (604) 292-9010
website www.norsat.com


> -----Original Message-----
> From: Mark E Witherite [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, July 10, 2001 9:09 AM
> To: Protel EDA Forum
> Subject: Re: [PEDA] Layer Stackup Info.
> 
> 
> Thanks Ted,
>          I have that book and knew I seen them somewhere.
> Cheers
> Mark
> At 03:24 PM 7/9/01 -0500, you wrote:
> 
> 
> >Coefficient*10^-5
> >
> >Material        Length  Cross
> >XXXP            1.2             1.7
> >XXPC            1.2             1.7
> >FR-2            1.2             2.5
> >FR-3            1.3             2.5
> >CEM-1           1.1             1.7
> >CEM-3           1.0             1.5
> >FR-6            1.0             1.0
> >G-10            1.0             1.5
> >FR-4            1.0             1.5
> >G-11            1.0             1.5
> >FR-5            1.0             1.5
> >GI              1.0             1.2
> >
> >HIGH FREQUENCY
> >GT              1.0             2.5
> >GX              1.0             2.5
> >POLYSTYRENE     7.0             7.0
> >CROSS LINKED
> >POLYSTYRENE     5.7             5.7
> >
> >"the table above is the change in length per unit of length 
> per degree
> >change in temp. the coefficient may vary in different temp. 
> ranges so the
> >temp. range must be specified."
> >
> >The table and the quote came from the Clyde F. Coombs JR. 
> Printed Circuit
> >Handbook p8.21-p8.22.
> >
> >Hope this helps,
> >
> >Ted

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* To post a message: mailto:[EMAIL PROTECTED]
*
* To leave this list visit:
* http://www.techservinc.com/protelusers/leave.html
*                      - or email -
* mailto:[EMAIL PROTECTED]?body=leave%20proteledaforum
*
* Contact the list manager:
* mailto:[EMAIL PROTECTED]
*
* Browse or Search previous postings:
* http://www.mail-archive.com/proteledaforum@techservinc.com
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

Reply via email to