[PCB_FORUM] Re: positive dynamic gnd/pwr planes in 15.2
- From: "Gary MacIndoe" <gary.macindoe@xxxxxxx>
- To: icu-pcb-forum@xxxxxxxxxxxxx
- Date: Wed, 4 May 2005 15:45:35 -0600
Ron,
I've tried all sorts of things (even increasing the accuracy to 3 with a
mils database), and nothing prevents the DRCs. So what do you setup to
avoid the DRCs?
Thanks,
Gary E. MacIndoe
PCB Design Engineer
Advanced Micro Devices, Inc.
Longmont, Colorado
-> -----Original Message-----
-> From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
-> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx]On Behalf Of Scott, Ron
-> Sent: Wednesday, May 04, 2005 3:30 PM
-> To: icu-pcb-forum@xxxxxxxxxxxxx
-> Subject: [PCB_FORUM] Re: positive dynamic gnd/pwr planes in 15.2
->
->
-> I'll chime in and say I've never had problems with the dynamic shaping.
-> It's just a matter of setup.
->
-> Cheers,
->
-> Ron Scott C.I.D.
-> Texas Instruments
-> Storage Products Group
-> Tel: 214.567.4715
-> Cell: 972.816.7978
-> rg-scott@xxxxxx
->
->
->
->
-> -----Original Message-----
-> From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
-> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Kevin McCowan
-> Sent: Wednesday, May 04, 2005 09:31
-> To: icu-pcb-forum@xxxxxxxxxxxxx
-> Subject: [PCB_FORUM] Re: positive dynamic gnd/pwr planes in 15.2
->
-> Well, I recommend going to positive planes.
-> I have and I have never looked back. Even with the little peculiarities
-> I think that the benefits outweigh the drawbacks. The seeing what you
-> get is a real bonus.
-> You should mess around with them a little more before you decide not to
-> change.
->
-> Kevin
->
-> Gary MacIndoe wrote:
-> > Hey Kevin,
-> >
-> > Yeah, I'm on 15.2/XP.
-> >
-> > I would think that with Cadence making pretty good progress with the
-> > dynamic thing, they would have fixed what I'm sure could still be
-> > considered "auto void". Oh well, maybe in a few more years... So, I
-> > guess I'll be sticking to negative planes, it's worked well for many
-> years now.
-> >
-> > Thanks for the response!
-> >
-> > Gary E. MacIndoe
-> > PCB Design Engineer
-> > Advanced Micro Devices, Inc.
-> > Longmont, Colorado
-> >
-> >
-> >
-> >
-> > -> -----Original Message-----
-> > -> From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
-> > -> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx]On Behalf Of Kevin
-> > -> McCowan
-> > -> Sent: Wednesday, May 04, 2005 6:07 AM
-> > -> To: icu-pcb-forum@xxxxxxxxxxxxx
-> > -> Subject: [PCB_FORUM] Re: positive dynamic gnd/pwr planes in 15.2
-> > ->
-> > ->
-> > -> Yeah. This is a problem. I just ignore the drc's that are around
-> > -> obviously cleared places anymore.
-> > -> The more decimal places you have the stupider it gets.
-> > -> At 3 places it is 4.999 when it should be 5.
-> > -> I am sorry to hear that they still have not fixed it in 15.2. You
-> > -> are on 15.2, right?
-> > -> Watch out, though. Some times it does not clear vias and pins that
-> > -> it should. I have recently taken to moving the plane 0 mils (lift
-> > -> and drop) to get it to regenerate the voids and that seems to work
-> > -> pretty well.
-> > ->
-> > -> Kevin McCowan
-> > -> Sr. PCB Designer
-> > -> TSI Telsys
-> > ->
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