I am designing a high voltage PCB so I have created clearance rules between nets equal to the pad spacing on the high voltage capacitors (4.5 mm). When I pour polygons, Altium appears to produce rectangular clearances around the pads for the capacitors. This probably does not matter with small clearances but with larger clearances I get large notches in polygons. Is there a way round this?
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\$\begingroup\$ So you have a clearance rule, and you want to be able to ignore that clearance rule? I would just move the offending parts, so you can maintain your desired clearances. \$\endgroup\$– HearthMay 14, 2019 at 0:53
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\$\begingroup\$ No, that's not what I want to do. I want to obtain the minimum clearance around a rectangular pad, no more, no less. That is not a rectangular area. \$\endgroup\$– Steve HubbardMay 14, 2019 at 1:33
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\$\begingroup\$ milled air gap for creepage is best \$\endgroup\$– Tony Stewart EE75May 14, 2019 at 1:36
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\$\begingroup\$ Please highlight the notches in your layout that are bothering you. \$\endgroup\$– Stefan WyssMay 14, 2019 at 16:58
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1 Answer
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Workaround:
- klick on problematic pad,
- in properties, change pad shape from "rectangular" to "rounded rectangle" and set corner radius to 1%
- repour polygon
