[SI-LIST] Re: Effect of PCB trace cross-section on SI
- From: "Tom Dagostino" <tom@xxxxxxxxxxxxx>
- To: <zeeshan73@xxxxxxxxx>, <weirsi@xxxxxxxxxx>, <paniraj_g@xxxxxxxxxxxx>
- Date: Wed, 29 Aug 2007 09:31:27 -0700
Way back in the dark ages there was a company that was offering =
prototype
and small lot "PCBs" that consisted of glued down wires on a circuit =
board.
And before that there was this technology called wire wrap which usually
never had a reference plane. And I can imagine someone trying to fix a
circuit board problem with a yellow wire and needs to analyze the fix.
Tom Dagostino
Teraspeed(R) Labs
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Teraspeed Consulting Group LLC
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-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] =
On
Behalf Of Zeeshan Siddiqi
Sent: Wednesday, August 29, 2007 8:41 AM
To: weirsi@xxxxxxxxxx; paniraj_g@xxxxxxxxxxxx
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Effect of PCB trace cross-section on SI
Are they teaching SI in college now? wow, times have
changed.
other than a co-axial setup, do we have any occurances
of having a circular trace on a PCB? trapeziodal yes,
but maybe some fab folks can enlighten us.
thanks in advance.
-zeeshan
--- steve weir <weirsi@xxxxxxxxxx> wrote:
> That sounds like a homework question. You can
> answer it by determining
> what properties would you expect to change by
> changing the cross-section=20
> shape. Then determine whether those property
> changes will impact your SI.
>=20
> Steve.
> Paniraj G. wrote:
> > Hi Gurus,
> > =20
> >
> > I am relatively new to PCBs and SI. I have a small
> query on the PCB trace
> > shapes.
> >
> > Currently the PCB trace cross-sections are
> rectangular (may not be exact due
> > to process constraints).
> >
> > If the cross-section happens to be circular, what
> affect it will have on the
> > SI( any Pros and Cons).
> >
> > =20
> >
> > Regards,
> >
> > Paniraj G
> >
> > =20
> >
> > =20
> >
> >
> >
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