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Reply To: | DesignerCouncil E-Mail Forum. |
Date: | Tue, 27 Jul 1999 14:01:50 +0200 |
Content-Type: | text/plain |
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Hi Adam,
these tracks certainly help (but should be open-ended), as we have done test on boards up to 8 Layers, with very high speeds (up to 1 Gig).
Kind regards,
Dieter
D.A. Beisiegel
Natech (Pty) Ltd.
P.O.Box 482
Wendywood
2144
South Africa
eMail: [log in to unmask]
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From: Hawes, Adam[SMTP:[log in to unmask]]
Reply To: DesignerCouncil E-Mail Forum.; Hawes, Adam
Sent: Tuesday, 27 July, 1999 10:07
To: [log in to unmask]
Subject: [DC] Ground Shield Tracks
I feel sure this is probably an issue for a lot of PCB
designers......
Recently, I have come across an increasing number of engineers who
wish to have certain tracks on multilayer PCB's shielded by ground traces
running adjacently. It seems to be a case of jumping on the bandwagon to me
because we never used to do this until about 12 months ago.
I was under the impression that ground tracks only served a useful
purpose on 1or 2 layer boards and that on a multilayer they were essentially
a waste of space as most of the capacitive coupling would be straight to the
ground plane.
I don't like to tell the engineers their jobs obviously so can
anybody put forward their views so I have a more solid argument!
Thanks all,
Adam Hawes
PCB Design Eng.
GenRad Ltd.
Tel: 0161 491 9290
Fax: 0161 491 9106
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