copper pour island inside a larger copper pour

eric_engineer — Thu, 21 Sep 2023 19:56:12 GMT

I can't figure out if this is something I'm doing wrong or if it's something Fusion does poorly. This is a simple two part board. I have one larger flood around the outside (A) and then a smaller flood in the middle of that one (C). You can see it as a violation in the picture below. What happens in other tools is when you draw a new polygon pour it cuts out a hole in the first one according to DRC spacing rules and then draws your second one. Fusion seems to just draw the polygon and throw an error. So, am I doing this wrong or is this another Fusion feature I have to work around? Probably by cutting a hole manually I'd guess.

Actually manually cutting the hole in the first plane didn't work either. If I delete the big plane the little pour will fill correctly right away though. Support suggested changing the rank but that doesn't actually work.

Re: copper pour island inside a larger copper pour

jorge_garcia — Thu, 21 Sep 2023 20:51:53 GMT

Hello @eric_engineer,

I hope you're doing well. You have to adjust the rank of the polygons. Rank determines the order in which the polygons subtract from each other. If they have the same rank then they just short which is the case here.

The inside polygon by default will have a rank of 1 (Top priority, like winners in a race) set the rank of the big outside polygon to be something after 1, 2 for example. Now you'll see that it clears away as expected.

Let me know if there's anything else I can do for you.

Best Regards,

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copper pour island inside a larger copper pour

Re: copper pour island inside a larger copper pour