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Creating circle in Virtuoso

zhengli
Hi, Can any one help me how to create a circle snapping to manufacturing grids defined in the technology file? I want to create a circle shape in virtuoso layout editor XL included in iCC 6.1.3. I found out that circle is actually created as a polygon. The problem is that when I export the layout into GDSII file, the ending points of the circle does not snapping to the manufacturing grids. I tried to create several real polygons, it is snapping to the grids. So I was wondering if there should be some additional setting to force circle shape snapping to grids. Please let me know if there is any solutions. Thanks a lot
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  • Thank you very much. What I want is actually a polygonal shape like a circle which is snapping to grids. However, even if I convert the circle to polygonal shape using Edit-> Advanced-> Convert, the resulting polygon are still not snapping to manufacturing grids. Conic slides can control how many sides I can have, but it seems that it doesn't help in this case. Is there any way that I can tell virtuoso to snapping all the points of the polygon to the grids? Thanks in advance! Best, Zheng
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  • Thank you very much. What I want is actually a polygonal shape like a circle which is snapping to grids. However, even if I convert the circle to polygonal shape using Edit-> Advanced-> Convert, the resulting polygon are still not snapping to manufacturing grids. Conic slides can control how many sides I can have, but it seems that it doesn't help in this case. Is there any way that I can tell virtuoso to snapping all the points of the polygon to the grids? Thanks in advance! Best, Zheng
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