[PCB_FORUM] Re: gnd plane and drc errors
- From: Barbara Seeger <blm@xxxxxxxxxxx>
- To: icu-pcb-forum@xxxxxxxxxxxxx
- Date: Fri, 11 Jun 2004 11:43:40 -0400 (EDT)
Hi,
Cadence engineering has been working on the round off issues and
15.2 is going to be improved in this area. But, what we wanted
customers to do as a general rule in 15.0 or 15.1 (if they saw
those roundoff drcs) is to use the oversize value at 2X the unit
of accuracy, not 1X.
If data were mils with 1 then the oversize should be .2 mils
If data were mils with 2 then the oversize should be .02 mils
etc.
This is expected to clear them up.
Regards,
Barbara Seeger - Cadence - 978-262-6578
> same thing it just putts them in one over size but i still get the same type
of message, error .01 too big. I just thought it was a little annoying..
> thanks to all
> >
> > From: "Gerry Meier" <gerry.meier@xxxxxxxxxxxxxx>
> > Date: 2004/06/10 Thu PM 09:43:20 EDT
> > To: <icu-pcb-forum@xxxxxxxxxxxxx>
> > Subject: [PCB_FORUM] Re: gnd plane and drc errors
> >
> > I have experienced the same thing - try adding a oversize value to the
> > clearance and it will take care of the problem. I think it's a rounding
> > error.
> >
> > Set the clearance oversize to 1 mil or larger
> >
> > Gerry Meier
> > Sr. PCB Designer
> > Freedom CAD Services, Inc.
> > Voice: (603) 864-1300 x1350
> > Alt. Voice: (386) 753-0048
> > Email: gerry.meier@xxxxxxxxxxxxxx
> > visit our website at<http://www.freedomcad.com
> >
> >
> >
> > -----Original Message-----
> > From: sjcharles@xxxxxxx [mailto:sjcharles@xxxxxxx]
> > Sent: Thursday, June 10, 2004 9:27 PM
> > To: icu-pcb-forum@xxxxxxxxxxxxx
> > Subject: [PCB_FORUM] gnd plane and drc errors
> >
> >
> > To all gurus:
> > I have multiple gnds (pwr,signal,earth and shield) and i need to edit all
> > layer, so i'll change all planes to dynamic shape and let program clear all
> > via that don't need to be tied. But i always get drc errors, rule says 8
> > mils but the opening is 7.99 mils. What gives? after i'm finish i change
> > shape type back to static and tie all the four types of gnds back together
> > around board edge. Why do i always get the 7.99 mils?
> > thanks in advance
> > Sam
> >
> > -----------------------------------------------------------
> > To subscribe/unsubscribe:
> > Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx
> > with a subject of subscribe or unsubscribe
> >
> > To view the archives of this list please login at
> > //www.freelists.org. Our list name is icu-pcb-forum
> > or go to //www.freelists.org/archives/icu-pcb-forum/
> >
> > Problems or Questions:
> > Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx
> >
> > Want to post a job listing ? DON'T DO IT HERE!
> > Better yet, join our jobs listing forum.
> >
> > SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx
> > POST: icu-jobs-forum@xxxxxxxxxx
> > -----------------------------------------------------------
> >
> > -----------------------------------------------------------
> > To subscribe/unsubscribe:
> > Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx
> > with a subject of subscribe or unsubscribe
> >
> > To view the archives of this list please login at
> > //www.freelists.org. Our list name is icu-pcb-forum
> > or go to //www.freelists.org/archives/icu-pcb-forum/
> >
> > Problems or Questions:
> > Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx
> >
> > Want to post a job listing ? DON'T DO IT HERE!
> > Better yet, join our jobs listing forum.
> >
> > SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx
> > POST: icu-jobs-forum@xxxxxxxxxx
> > -----------------------------------------------------------
> >
>
> -----------------------------------------------------------
> To subscribe/unsubscribe:
> Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx
> with a subject of subscribe or unsubscribe
>
> To view the archives of this list please login at
> //www.freelists.org. Our list name is icu-pcb-forum
> or go to //www.freelists.org/archives/icu-pcb-forum/
>
> Problems or Questions:
> Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx
>
> Want to post a job listing ? DON'T DO IT HERE!
> Better yet, join our jobs listing forum.
>
> SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx
> POST: icu-jobs-forum@xxxxxxxxxx
> -----------------------------------------------------------
-----------------------------------------------------------
To subscribe/unsubscribe:
Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx
with a subject of subscribe or unsubscribe
To view the archives of this list please login at
//www.freelists.org. Our list name is icu-pcb-forum
or go to //www.freelists.org/archives/icu-pcb-forum/
Problems or Questions:
Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx
Want to post a job listing ? DON'T DO IT HERE!
Better yet, join our jobs listing forum.
SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx
POST: icu-jobs-forum@xxxxxxxxxx
-----------------------------------------------------------
Other related posts:
