[PCB_FORUM] Re: BBVs
- From: "Chris Brennan" <Chris.Brennan@xxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Fri, 8 Apr 2005 12:51:28 -0400
Same here.
CJB
Chris Brennan, C.I.D.
PCB Designer
Fidus Systems Inc.
chris.brennan@xxxxxxxx <mailto:chris.brennan@xxxxxxxx>
________________________________
From: george.h.patrick@xxxxxxxxxxxxxx
[mailto:george.h.patrick@xxxxxxxxxxxxxx]
Sent: Friday, April 08, 2005 11:59 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: BBVs
Gary:
We create them "on-the-fly" inside the database.
The drill symbols are the same, but the charts are created on separate
layers so it doesn't really matter (at least in 15.2).
--
George Patrick
Tektronix, Inc.
Central Engineering, PCB Design Group
P.O. Box 500, M/S 39-512
Beaverton, OR 97077-0001
Phone: 503-627-5272 Fax: 503-627-5587
http://www.tektronix.com <http://www.tektronix.com/>
http://www.pcb-designer.com <http://www.pcb-designer.com/>
It's my opinion, not Tektronix'
-----Original Message-----
From: Gary MacIndoe [mailto:gary.macindoe@xxxxxxx]
Sent: Friday, April 08, 2005 08:47
To: Allegro Forum
Subject: [PCB_FORUM] BBVs
All,
When you use blind and buried vias, do use set them up in the
board database from an existing regular top to bottom via? Do you
create BBV padstacks for your pad library?
I see in the padstack editor, Parameters tab, you can set the
Type to "Blind/Buried". I've tried to create a BBV padstack in the
editor without luck.
What do you guys using BBVs do? Create them in the design or in
your library?
Also, when creating the drill legend for the Fab drawing, if a
1-2 blind via and a 8-7 blind via were created in the database from the
same top to bottom via (the same laser drill size in this case), the
"figure" in the drill legend is the same. Is this correct, or do you
have different "figures" for the 1-2 and 8-7 same size drills?
Thanks for any responses!
Gary E. MacIndoe
PCB Design Engineer
Advanced Micro Devices, Inc.
Longmont, Colorado
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