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://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
