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Height restrictions in PCB areas

Frozen001

I am working a design were depending on the location on the PCB there are different height restrictions. I am wondering if there is a way to set up an area that will through a DRC if I violate the maximum allow hights?  I tried a package keep-out area and set the max height parameter, but that just through a DRC for every part within the keep-out area.

  • Lennie

    You can setup multiple package keep-out areas with different height requirements.

  • Frozen001
    in reply to Lennie

    I understand that, but the problem I have is when I place a package keep out since it is a keep out, All my component results in a DRC error, maybe I am just setting it up incorrectly.

  • Lennie
    in reply to Frozen001

    The component height needs to be in each footprint and the max height is in the properties of the package keepout.  If there are component heights greater than the max height in the keepout you will get an error.

    Take a look at the following form Cadence.

    https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1Od0000000nT6oEAE&pageName=ArticleContent

  • oldmouldy
    in reply to Frozen001

    You need to set the Minimum Height Parameter on the Package Keepout, an empty, or 0, value here will mean "the board surface", the Maximum Height Parameter on the Package Keepout should be empty ("edge of the universe"). For Package Height Parameters, Minimum on the Place Bound would be 0 if the Part mounts on the board surface with little, or no, clearance, or specify the clearance but, typically, "nothing" goes under the component, Maximum would be the body height. Max on the Place Bound needs to "clear" Min on the Package Keepout. Place Bounds may be "stacked", if required, for objects like LCD displays that mount "over" the board to handle description of the "screen" and the "mounting pins" areas.

  • Frozen001
    in reply to oldmouldy

    I must be doing something wrong, and I am sure it is simple.

    Here is what I do I draw a rectangle on the "Package Keepout Top" layer.  I then go Setup -> Areas -> Package Height. Se min to 0 Max to say 200 mils. 

    when I do this I get the following DRC on every component:

    "Package to Place Keepout Spacing: Required 0 actual 150mil" 

    Object 1: Shape Package Keepout/Top"

    Object 2: Whatever component the errors/Package Geometry/Pace_Bound_Top

    Constraint Set: Package_Height_Min

    DRC Subclass: Package_Top

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