IF<
/u> all
of your stitching vias are to GND, then you can move all of your
non-GND positive planes off-board before reading in the clip. Then the
unconnected vias will get associated with GND, and then you can move
the other planes back on the board.
Jean Bratton
Senior PCB Designer
Freedom CAD Services, Inc.
Office: 603-864-1349
Email: jean.bratton@xxxxxxxxxxxxxx
Visit us at http://www.freedomcad.com
-----Origi nal Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx]
On Behalf Of Mark Salberg
Sent: Monday, July 27, 2009 9:04 AM
To: Cadence User Group
Subject: [PCB_FORUM] Allegro Sub drawing / Via stitch problem
Hello all,
When Exporting a Sub-Drawing I found
that any vias in a shape used for
stitching...connected to a shape,
but
has no traces to a pin...looses
connectivity and sometimes connect
to
a different plane after import
sub-drawing.
The only way I have found to fix it
is
to ALSO route a t race from a pin
to the via to force the connection.
Is there a way to locate any
occurrences of this prior to exporting a
Sub-Drawing?
Thought maybe dangling wire
reporting
as dangling via...but a Dangling
via is defined a a via with only one
connection from a pin. These vias
simply dropped in a shape for
thermal
reasons do not get flagged.
Any thoughts as to how to find them
in
a design?
Thanks,
Mark
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