Maybe few bug in the klayout

Good afternoon,
when using this great software I found some things that I think dont work correctly:

1) when trying to merge selected paths with zero width the result is nothing (no paths at all)

2) when trying to save in Gerber format the result is gds file with gerber extension.

Is it a bug or just my misuse of the software?

Comments

  • edited February 2020

    Hi

    1.) "Merge" will convert the shapes into polygons first and for a zero-width path, these polygons vanish because they have no area. Zero-width paths are not valid mask objects anyway, so I wonder why you have them. If you want to represent edges, that's an entirely different story. DRC provides many features for edge manipulations including "merge".

    2.) There is no Gerber export, sorry. Don't be confused by the options in the file dialog - they just specify the file filter, NOT the format the layout is saved. This is done in the "Save Options" dialog that appears in "Save As" after you have picked the file name.

    Matthias

  • In a current project the foundry CAD folks directed me to
    use zero width paths for my "guide line" features (like, I
    place 45'd zero width paths at the edges of the routing
    channel drawn through the stretched collector region of
    a NPN, to guide the placement of a through-path). Using
    non-zero-width paths was "breaking" LVS but zero width
    paths are ignored (bug, or feature, take your pick). Why
    Tanner LVS would barf on a text object of any sort I have
    no idea. I just got told, and did it.

    Now I had no call to merge these. And I observe that in
    general, CAD tool "merge" commands take any combination
    of box, polygon and path down to polygon form - but only
    paths are considered valid at zero width.

Sign In or Register to comment.