From: Barry Ma (firstname.lastname@example.org)
Date: Thu Aug 31 2000 - 10:53:14 PDT
Brian and Muhammad,
Here is my 2 cents.
Another factor I'd like to consider is the H-field at the conductor surface. If the width dimension of the trace supports much stronger H-field than the height direction, we should increase the width dimension first ....
From: "Baikuan Wang" <email@example.com>, on 8/31/00 10:19 AM:
Skin effect means that most of the current flows along the surface of the conductor.
In this way, the effecient area current goes through is more dependent on
the perimeter rather than the real area (Height x Width). Therefore, inreasing width is more effecient that increasing height in view of reducing the resistance of traces.
[mailto:firstname.lastname@example.org]On Behalf Of Muhammad S. Sagarwala
Sent: Thursday, August 31, 2000 9:45 AM
Subject: [SI-LIST] : skin effect
Hello Si Gurus,
I just had an interesting discussion with my boss on "skin effect on pcb
I was of the opinion that increasing the trace thickness from 1/2 oz. to 1oz. would help reduce the skin effect but according to him skin effect does not reduce significantly
with the increase in trace thickness.
He was of the opinion ( and also had some data to back him up) that skin
effect is more dependent on the width of the trace.
I always thought that if one increases the overall perimeter of the pcb trace - regardless of whether it is done by increasing the width or increasing the thickness - the skin effect would reduce. I would appreciate if somebody could come up with a better explanation...
p.s.: when we talked about pcb traces we were talking about striplines in
Muhammad S. Sagarwala
Ph. (408) 586 7065
Fax (408) 586 4668
Barry Ma <email@example.com>
Morgan Hill, CA 95037
Tel. 408-778-2000 x 4465
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