All good if you want one clearance. We build our padstacks with the proper manufacturing clearances. So for 95% of the cases using dynamic planes we don't have to add any properties. Good libraries save lot's of design time. For non-plated holes there can be many different clearances depending on your Geometric Dimensioning. Let's agree to disagree that their are many ways to do this all with positive and negative options. Forgive the pun. Jerry ________________________________ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Gerry Meier Sent: Friday, December 14, 2007 2:33 PM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Re: Anti-pads Yes you can specify for the shapes to use Anti-pads, but I do not see the benefit? Dynamic shapes are much more controllable by using the pin properties to define type of connections, increased clearances, etc. Gerry Gerry Meier, Sr. PCB Designer Freedom CAD Services. Inc Voice: (256)776-7470 or (603) 864-1350 Email:gerry.meier@xxxxxxxxxxxxxx visit us at http://www.freedomcad.com ________________________________ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Schwartz, Jerome Sent: Friday, December 14, 2007 1:27 PM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Re: Anti-pads Actually Anti_Pads are on positive planes. By using them instead of the DRC values you can vary the clearance per padstack. This is a good option for different size non-plated holes with various GD&T and for high layer count designs with small drills. Jerry ________________________________ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Gerry Meier Sent: Friday, December 14, 2007 2:16 PM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Re: Anti-pads It's a 26 mil anti-pad, anti-pads are only defined on Negative planes. You would not have a 20 mil pad on a negative plane layer. If you are using "positive" planes then you would relay on the DRC values "pad to shape" for that and then yes suppress non-functional pads. Gerry Gerry Meier, Sr. PCB Designer Freedom CAD Services. Inc Voice: (256)776-7470 or (603) 864-1350 Email:gerry.meier@xxxxxxxxxxxxxx visit us at http://www.freedomcad.com ________________________________ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Macindoe, Gary Sent: Friday, December 14, 2007 1:11 PM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Re: Anti-pads Thanks Gerry. I haven't thought about it for quite a while, I was forgetting that anti-pad to drill is what matters. I suppose with an anti-pad that small, you have to make sure you suppress unused inner pads. A drill of 10 mil probably has a 20 mil pad, so a 16 mil anti-pad to a 20 mil pad would be too close otherwise. Thanks again, Gary Gary E. MacIndoe PCB Design Engineer Fort Collins, Colorado amd.com gary.macindoe@xxxxxxx ________________________________ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Gerry Meier Sent: Friday, December 14, 2007 11:48 AM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Re: Anti-pads 16 mil over the drill size - 10 mil drill 26 mil anti-pad Gerry Meier, Sr. PCB Designer Freedom CAD Services. Inc Voice: (256)776-7470 or (603) 864-1350 Email:gerry.meier@xxxxxxxxxxxxxx visit us at http://www.freedomcad.com ________________________________ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Macindoe, Gary Sent: Friday, December 14, 2007 12:28 PM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Anti-pads Hey guys, We haven't thrown around anti-pads for a while! What is the smallest anti-pad for an inner plane that you have successfully used? Has anyone used down to 5 mils a side anti-pad to pad? Thanks, Gary Gary E. MacIndoe PCB Design Engineer Fort Collins, Colorado amd.com gary.macindoe@xxxxxxx This correspondence and any attachments are considered confidential. If you are not the intended recipient, please notify Freedom CAD Services, Inc. immediately by either replying to this message or by sending an email to operations@xxxxxxxxxxxxxx; please destroy all copies of this message and any attachments. Thank you. This correspondence and any attachments are considered confidential. If you are not the intended recipient, please notify Freedom CAD Services, Inc. immediately by either replying to this message or by sending an email to operations@xxxxxxxxxxxxxx; please destroy all copies of this message and any attachments. Thank you.