Electronics > Altium Designer

Custom soldermask

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yabba235:
Hi !
How to get a soldermask like on the main pcb from the photo? Can it be obtained directly from Altium or do you have to edit the gerber file?

voltsandjolts:
Kinda looks like the solder mask layer was just a copy of the copper layer. Funky. Audiophool kit?

T3sl4co1l:
Layers are OR only, not AND (or other functions), so you can't do that by fill or rule.  Next best would be, generate mask gerber, import as negative, and set expansion as appropriate.  Which will be contraction actually, which may require some processing beforehand.

Tim

yabba235:

--- Quote from: voltsandjolts on May 26, 2023, 04:50:24 pm ---Kinda looks like the solder mask layer was just a copy of the copper layer. Funky. Audiophool kit?

--- End quote ---

No, its part of main board Mark Levinson preamplifier 326S  :palm:

yabba235:

--- Quote from: T3sl4co1l on May 26, 2023, 07:20:03 pm ---Layers are OR only, not AND (or other functions), so you can't do that by fill or rule.  Next best would be, generate mask gerber, import as negative, and set expansion as appropriate.  Which will be contraction actually, which may require some processing beforehand.

Tim

--- End quote ---

That's how I think about this solution. I am curious, however, what is the name of this type of this soldermask in production - maybe that's why I can't find any description because I'm looking for the wrong keywords? Boards produced in this way have been known for over 30 years, so there must be a proper name for such a technology.

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