I have done this for years, no DRC problem at all with small pads on the top layer and large on the bottom, this is a great way to get some real estate back for tracks etc...
Darren Moore > -----Original Message----- > From: Ian Wilson [mailto:[EMAIL PROTECTED]] > > On 07:50 PM 19/09/2002 +0100, Rich Thompson said: > > >On 09:36 AM 19/09/2002 +0200, Ian Wilson said on PEDA: > > > > >snip< > > > >The P99SE DRC system does not consider multi-layer entities as also > >existing on the various copper layers. This is why > Kulajew's rule does > >not > >work. I have raised this with Altium on a number of > occasions. It is a > > > >structural issue I gather. It is not a bug but a limitation of the > >underlying architecture. To us users, though, it is annoying. > > > > >> very annoying, and its STILL the same on DXP! What > gives Atium? We > >do mostly single/PTH boards, and very rarely mulilayer. My > library has > >overy large bottom layer pads (for single sided boards) and > very small > >top layer pads (to encourage solder to flow up pth wall and > stop shorts > >etc on top) this means however that when I route on top layer it > > >loooks< as though im going to short (because I see the biggest pad, > >bottom) and not the extra space around the top pad) Arrrgh! > > I just tested this in DXP - it seems to work OK at least DRC > allowed me to > bring the top tracks close to the top pad size while bottom > layer tracks > were controlled by the size of the bottom layer pad size. > > In fact I thought this worked OK in P99SE as well. The > clearance DRC, I > thought, is smart enough to use the different pad sizes according the > tracks layer. > > I must be missing something here. Can you explain more? Can > you email me > (directly not to the list - [EMAIL PROTECTED]) a > small sample file > showing the issue? > > My problem with multilayer entities is really restricted to > the calculated > layers like paste and mask layers. > > Ian * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *