[PCB_FORUM] Re: BBVs
- From: "Gene Carman" <gcarman@xxxxxxxxxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Fri, 8 Apr 2005 10:05:05 -0700
set up fab drawings for each layer.
-----Original Message-----
From: Gary MacIndoe [mailto:gary.macindoe@xxxxxxx]
Sent: Friday, April 08, 2005 10:02 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: BBVs
Hey 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.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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