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How to find traces that are not a 45 degree in layout?

MaxS

Hello,

Does anybody know any method to find traces in the design that are routed at a free angle - not 45, not 90?

Looks like the Vision manager and Assembly rule checker cannot help. 

  • RFinley

    That one is a bit more obscure.   Curious what is driving this requirement?

  • MaxS
    in reply to RFinley

    Some of the traces in the layout were routed at free-angle or edited by vertex command. Need to return them back to 45 degree style. It's a manufacturer requirement. 

  • RFinley
    in reply to MaxS

    Unless your airgap minimum is less than 0.07mm or less,  I would question that.   It's a chemical process, etching the copper.   For a conductor, it's never going to come out perfect unless you use MCM or chip lithography etching methods and unusually thin copper in the stackup. 

    I think a skill script can be written to flag any trace segment that isn't orthogonal.  The trigonometry is straightforward and you have a full set of Trig functions in SKILL.

  • masamasa

    u can find traces that r not a 45 degree angle.

    first, u select "cline segs" in the find filter.

    then u select clines and run the "show element" command.

    u will see the element of each cline and the angle of each cline. 

    an example is shown below.

    the middle cline has a 20.905 degree angle but others have a 45 degree angle.

    u can place them in the excel sheet and sort them out to find angles that are not a 45 degree.

     

    u can also set up the design level drc by using the analysis mode on setup --> constraints --> modes

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