From: Goodrich, Dennis ([email protected])
Date: Mon Jun 12 2000 - 15:05:18 PDT
Sean, what weight/thickness copper did you use for the signal layer
and the plane layers? 1 oz, 1/2 oz, 2oz?
Also did you use edge coupled diffy (side by side)?
What dielectric material did you use? FR-4? other?
Dennis Goodrich
Engineering Program Manager
Signal Integrity Engineer
Tyco Printed Circuits Group
700 Jeffery Way, Round Rock, TX 78664
512.671.5203 / 512.671.5228(FAX)
[email protected] / [email protected]
> -----Original Message-----
> From: Sean Murray [SMTP:[email protected]]
> Sent: Monday, June 12, 2000 3:35 PM
> To: '[email protected]'
> Subject: [SI-LIST] : DIFF PAIRS
>
> Anyone have any thought on what to use for the following numbers.
>
> Material: CE
> Impedance: ZO of the differential trace is 50Ohm and ZOD of each
> differential pair traces is 100Ohm.
>
> I built a board using 8 mill traces with a 8 gap between the pair, and
> .008 gap between plane to sig and then plane.
>
> Numbers were not what I expected, fabhouse used Polar+fudge factor to
> give me the numbers.
>
>
>
> Regards,
> Sean Murray
> General Manager
>
> M&M Specialties Inc.
> 1236 W. Southern Ave. #106
> Tempe, AZ. 85282-4518
> Phone: (480) 858-0393 x105
> Cell: (602) 684-7859
> Fax: (480) 858-1882
> Email: [email protected]
> WWW.mmspec.com
>
>
>
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