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Copper Pour Around Vias

therrm266

I'm trying to perform a copper pour around a via but it appears to be acting oddly.

image

I would expect the copper pour to wrap around the via, making a circle with a clearance set by my DRC options.

 

This becomes a bigger problem when getting a power pour under a BGA with vias; the hexagon shapes waste space.

image

 

Does anybody know why it is creating a hexagon shape instead? I have tried adjusting my DRC, changing width of poly, and some other options, but I haven't had any luck.

 

Any suggestions would be greatly appreciated!

 

Thanks!

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    On 2/9/2017 11:20 PM, therrm266 wrote:

    I'm trying to perform a copper pour around a via but it appears to be acting oddly.

    I would expect the copper pour to wrap around the via, making a circle with a clearance set by my DRC options.

     

    This becomes a bigger problem when getting a power pour under a BGA with vias; the hexagon shapes waste space.

     

    Does anybody know why it is creating a hexagon shape instead? I have tried adjusting my DRC, changing width of poly, and some other options, but I haven't had any luck.

     

    Any suggestions would be greatly appreciated!

     

    Thanks!

     

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    Hello Therm,

     

    I hope you're doing well. I've seen this before, its not a bug there is

    usually an issue with the width of the polygon, try using a lower width

    and see if that gives you shape closer to a circle.

     

    As has already been mentioned, polygons are drawn with a bunch of

    straight line segments so if the width is large relative to the via size

    you may get a hexagon.

     

    Please let me know if you continue to run into problems.

     

    Best Regards,

    Jorge Garcia

     

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  • 0 in reply to autodeskguest

    Hi Jorge,

     

     

    Hm, how do I get hexagon? Not Octagon? - because the computer makes the basic shape in octagon, or not?

    An octagon is closer to the round shape than a hexagon, right?

    Is this true that there was a discussion about round or octagon? I think I can remember it?!?

     

    Regards,

    Gerald

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