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How to create Void in a Non-Etch Shape

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For example, the shape in PACKAGE KEEPOUT or ROUTE KEEPOUT,
how to create a void manually  like doing that in an etch shape?


Originally posted in cdnusers.org by leonlee

  • You cannot have voids in non etch shapes. Shapes where you would require a hollow i.e. doughnut, such as route keepouts, must be made with one shape being a ‘C’ shape and another shape being added to close the opening.

    KP


    Originally posted in cdnusers.org by kp

  • Or you can use a single shape with a small gap.


    Originally posted in cdnusers.org by Randy R.

  • Yes, I always do it like this:
    Use the function: Shape Edit Boundary, Cut a big void and remain a small gap, it seems a "C" shape.
    But I think it is a stupid solution.
    Does anyboy have other effective solution?
    Thanks.


    Originally posted in cdnusers.org by leonlee

  • I would agree that there should be a better solution. Would be a good idea to raise a CRC with Cadence. This is an improvement which would be very welome. You never know it may already be included in a forthcoming release.


    Originally posted in cdnusers.org by kp

  • I always use the Ohio Harmony tool to acomplish this.  I create my void in a etch shape (must be static shape) then change this voided etch to the desired layer in Allegro.

    Not helpful if you don't have Harmony...sorry

    I think this capabilty would be a good feature to add to the Allegro tool.


    Originally posted in cdnusers.org by toby
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