How to ignore the DRC check "... solder mask aperture bridges items with different nets" using a custom rule

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1

Hello,

I’m designing a high-impedance board where I want to remove the solder mask in certain places. This works well by placing e.g. polygons on the *.Mask layers.

However, the DRC (rightfully) flags lots of “… solder mask aperture bridges items with different nets”. Rather than disabling the rule globally I’d like to specify an exception for the specific areas.

I have accomplished this for silk screen errors using the rule

(rule testrule
	(severity ignore)
	(condition "A.intersectsArea('silk_clip_ok')")
	(constraint silk_clearance)
)

where silk_clip_ok are the rule areas where I don’t want the check to be performed. However, I couldn’t find the constraint name for disabling the solder mask aperture bridge rule and therefore created a feature request in the issue tracker (see Issue 21732).

I was referred to the severity clause and the issue was closed, but I do not understand the response. I know that severity ignore can be used to avoid flagging the errors (like above), but what constraint matches the solder mask aperture check?

Before bothering the devs again, I decided to ask here, if anyone has a clue for me.

2

I don’t have a solution (seems like devs agree now that there is a feature missing) but I wanted to thank you for making the issue. I gave it a thumbs up since this has bothered me for quite a while and I’ve just never bothered to look into it (just constantly right click > ignore those DRC errors).

3

Yeff Young re-opened your issue and turned into a feature request.

I don’t know much about these custom rules, but for finding a solution, I would attempt to disable the global rule (In the Severity list). and then create a custom rule that excludes your special zone(s).

4

Thank you for having a look. The issue was re-opened shortly after I created my post here. Seems like a was a bit to impatient.

If I understand correctly, there is currently no appropriate constraint for creating custom solder mask bridging rules for. Well, let’s see how the issue progresses.