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Constraint Manager Design for Fab Mask Checks

AndyFabans

Does a good reference exist someplace detailing how to use the Constraint Manager Design for Fabrication Mask constraints that showed up in 17.2-2016 Hotfix 25?  I have created a DFFMaskCset, created a Mask subgroup that selects all of the soldermask subclasses (PkgGeo, BrdGeo, pin, & via) and applied the CSet to it, and I have enabled the Mask analysis modes.  When I run DRC, I get no errors related to the soldermask, even when I set the Slivers and Islands values to something ludicrous like 100mil.  The What's New in the Hotfix doc doesn't offer any wisdom beyond a little description of each setting.

Many thanks.

  • steve

    It's working for me so first make sure you have S026 installed. For information if you log into Cadence online support and look for the What's New in Constraint Manager doc that should give you an idea. if not contact Cadence Support or your channel partner who should be able to go through this with you. support.cadence.com/.../techpubDocViewerPage;title=Allegro Constraint Manager: What's New in 17.2-2016 -- Constraint Manager: What's New in 17.2-2016 Quarterly Incremental Release - Manufacturing Design for Fabrication Checks&hash=1030581&c_version=17.2-2016&sq=005d0000005nGuFAAU_2017928104156897&path=consMgrPN/consMgrPN17.2-2016/consMgrPN_172.html#1030581

  • AndyFabans
    I upgraded from 025 to 026 and that didn't help. I contacted support, and they sent me a test design, where I went through what I thought were the same steps and the DFx constraints correctly generated DRCs. Then I repeated that process with my own design, and DFx worked there as well. So while it is now working, I cannot pin down why it wasn't working previously after the 026 install.

    Many thanks for your help.
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