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correct RF shield footprint, with parts inside

PascalVM

Hi, I have a footprint for a RF shield. I'm getting a lot of DRC errors "package to package spacing", basically for any part that is placed within the RF shield.

Here are screenshots. What would be the appropriate way to handle this footprint, so that it would not produce these errors?

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Parents
  • eDave

    The simple answer is to add a PACKAGE_HEIGHT_MIN property to the place bound shape on the shield. This should be the minimum height of the "ceiling" of the shield. To be strictly correct you should have multiple place bound shapes on a shield because the minimum height for the walls differs from the rest.

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  • eDave

    The simple answer is to add a PACKAGE_HEIGHT_MIN property to the place bound shape on the shield. This should be the minimum height of the "ceiling" of the shield. To be strictly correct you should have multiple place bound shapes on a shield because the minimum height for the walls differs from the rest.

Children
  • jmadsenee
    in reply to eDave

    How do you use multiple place bound shapes?  I tried a place bound outside my shield with just a max height and then added another place bound inside the shield with a min height and I get the drc errors.  Adding the same max height to the inside place bound did not help.

  • steve
    in reply to jmadsenee

    The key here is setting both min and max height for all the place bound shapes. For the walls the min height could be zero and the max height would be the height of the wall (say 5mm). For the top cover set the min height to 5 and the max height to 6 (1mm thickness) and that will create the envelope. Take a look at:- orcad.co.uk/.../Height_definition.pdf there is a nice graphic that should help explain this.

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