[PCB_FORUM] Re: BBVs
- From: "Gary MacIndoe" <gary.macindoe@xxxxxxx>
- To: icu-pcb-forum@xxxxxxxxxxxxx
- Date: Fri, 8 Apr 2005 11:02:24 -0600
MessageHey George,
Thanks for your response. That's the way I created them, inside of the
design.
The Fab drawing thing seems funny though: I know they are the same size
drill, but with the same drill symbol, looking at the figures inside of the
board outline, how can you tell the 1-2s from the 7-8s?
Thanks again!
Gary E. MacIndoe
PCB Design Engineer
Advanced Micro Devices, Inc.
Longmont, Colorado
-----Original Message-----
From: george.h.patrick@xxxxxxxxxxxxxx
[mailto:george.h.patrick@xxxxxxxxxxxxxx]
Sent: Friday, April 08, 2005 9:59 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.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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