Dave, My recommendation to make this fool proof ( which is the method I use because, I have volunteered to be the fool before) ... use a split plane , to isolate your channel , then use a 0 ohm device, to act as the power feed into that isolated plane area. The DRC s will work, as long as you don't place the plane directly over a pin associated with the nets used on the plane. Always Print your gerber files and view the split planes.
Abdul: I know the drcs are supposed to catch split planes on vias but I have one instance where the drc didn't catch it. As I mentioned it was the only board in my Protel history that showed up with a problem. So I remember it well. I sent that one to Protel several years ago. Mike Reagan EDSI Frederick MD ----- Original Message ----- From: Dave Eloranta <[EMAIL PROTECTED]> To: 'Protel EDA Forum' <[EMAIL PROTECTED]> Sent: Thursday, November 21, 2002 1:43 PM Subject: Re: [PEDA] shorted planes due to alignment pin holes with no plane expansion > > Mike > I have no split planes passing thru the hole. I do have traces drawn in the > planes that channel currents. > > Dave > > -----Original Message----- > From: Mike Reagan [mailto:[EMAIL PROTECTED]] > Sent: Thursday, November 21, 2002 11:25 AM > To: Protel EDA Forum > Subject: Re: [PEDA] shorted planes due to alignment pin holes with no > plane expansion > > > Dave, > > You didnt mention if this was a result of a split plane passing thru the > hole.....This is the only time I have ever encountered a short in which the > DRC did not catch it. Actually it is the only DRC that has ever failed for > me. > > Mike > > ----- Original Message ----- > From: Dave Eloranta <[EMAIL PROTECTED]> > To: 'Protel EDA Forum' <[EMAIL PROTECTED]> > Sent: Thursday, November 21, 2002 10:07 AM > Subject: [PEDA] shorted planes due to alignment pin holes with no plane > expansion > > > > Hi > > I just got a 10 layer board back with the +3.3 plane shorted to the ground > > plane at 2 alignment pins. The design rules were set for a 14 mil power > > plane clearance. The alignment holes are plated but do not electically > > connected to any net. The DRC found no problem and the gerber generator > did > > not flash a plane clearout in the plane layers for these 2 holes. > > We were able to remove the connector and ream the holes to isolate the > > planes. > > The other feature of the rules that are different on this board from > > others that I have done is that I have 3 additional plane clearance rules > > that apply to regions of the board under BGAs that require a smaller plane > > clearance of 12mils. > > I am surprized that I have not run into this problem before. > > > > Dave Eloranta > > [EMAIL PROTECTED] > > Locus Inc. > > 5540 Research Park Dr. > > Madison, WI > > > > > > > * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://firstname.lastname@example.org * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *