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 Opening windows in Solder Mask

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T O P I C    R E V I E W
psxforum Posted - 19 Aug 2013 : 09:20:34
Sometimes you may want to open a 'window' in your solder mask/resist to allow something like a copper shape to be available as a conducting surface. Plotting solder masks will automatically deal with generating windows for the necessary pads/vias, but for copper you will need to make the windows yourself.

Assuming you already have a copper shape (either in the design or in a footprint) that you want to keep clear of resist, here is all you need to do:

  • Select the copper shape

  • Copy

  • Paste

  • Right-click and 'Cancel Move'

  • Select the new copper shape, right-click and 'Change Shape Type'

  • Change the type to 'Doc Shape'

  • Right-click and 'Change Layer' to change to the required layer

You should now have a shape on your resist layer that corresponds to the copper shape. If you want to slightly 'oversize' your mask shape:

  • Select the shape

  • Right-click and 'Resize Shape'

  • Enter the amount by which you want the shape to be grown