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Gaps by rotating Layout Components

Question asked by SIROREHN on Dec 20, 2005
Latest reply on Dec 20, 2005 by SIROREHN

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Hello,

IÂ´ve got a problem which is driving me mad right now. I got some coupled lines and want to build up a filter. If all is in a straight line there`s no problem. Now I wanted to build a waveguide in Momentum and tried to rotate the layout components by 15 degrees. Since then there are gaps everywhere and my filter doesnÂ´t work anymore. So I tried to reduce the resolution so that the mesh wonÂ´t regognize the gapa and sometimes it works.
But my most urgent problem is if I want to build the filter on a substrate I need an GDSII-File. And there the gaps keep appearing, no matter what resolution I use.
Can someone please help me???!!

Many Thanks!!!

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ALEPEREZ

Dec 20, 2005 2:54 AM

You will probably have to send your model to the tech support team in your region to get this precisely analyzed. Gaps can often be eliminated by using the "healing" algorithm of layout. It's defined via the Final Minimum Vertex Distance field in Options>Preferences>Entry/Edit tab. The value defined there will be used to snap together vertex points that are closer than this distance. You may have to create a pure layout by flattening the components and using the Boolean Edit>Merge>Union command which activates this feature. If that does not work, you may have to merge before doing the rotation and then rotate so gaps cannot be created at all. The gaps probably occur when different width lines end up snapping to different resolution grid points.

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SIROREHN Dec 20, 2005 10:23 PM

Thank you,

flattening merging and then rotating the structure didnÂ´t work, because there are problems with the grid snap if I want to rotate the whole structure. But flatting the already rotated single coupled lines and then moving them just a little bit and then merging did work.

Thank you for your christmas present answer.

Robert

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ALEPEREZ Dec 20, 2005 2:54 AM
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You will probably have to send your model to the tech support team in your region to get this precisely analyzed. Gaps can often be eliminated by using the "healing" algorithm of layout. It's defined via the Final Minimum Vertex Distance field in Options>Preferences>Entry/Edit tab. The value defined there will be used to snap together vertex points that are closer than this distance. You may have to create a pure layout by flattening the components and using the Boolean Edit>Merge>Union command which activates this feature. If that does not work, you may have to merge before doing the rotation and then rotate so gaps cannot be created at all. The gaps probably occur when different width lines end up snapping to different resolution grid points.
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SIROREHN Dec 20, 2005 10:23 PM
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Thank you,

flattening merging and then rotating the structure didnÂ´t work, because there are problems with the grid snap if I want to rotate the whole structure. But flatting the already rotated single coupled lines and then moving them just a little bit and then merging did work.

Thank you for your christmas present answer.

Robert
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Gaps by rotating Layout Components

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