Sunday, August 3, 2014

Check silkscreen over untented VIAs

To avoid silkscreen over untented VIAs use a design rule to check the clearance from the silkscreen to the soldermask openings.

Example: Use a design rule check to catch this silkscreen printed over VIAs. 















Example rule:


Where first object matches:

(IsText OR IsTrack OR IsArc OR IsFill) 

Where second object matches: 

OnTopSolderMask Or OnBottomSolderMask  

Note: I used a 3 mil clearance because be soldermask expansion on this design was 4 mil, this gave me a 7 mil clearance to the exposed copper pads of the vias. 

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