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GRID SPACING

auto dipper
Hi all,

regarding changing the grid spacing in the schematic composer & the layout editor of virtuoso.

Is the grid spacing dependant on what technology file is attached to the library at the time of creation of the library?

Is it advisable to change the grid spacing to adjust things while drawing the layout

regards
Parents

  • There are manufacturing reasons why objects should be on a grid - there is finite resolution during the mask-making process (amongst others).

    Changing the snap spacing will not alter a DRC rule which is expecting the data to be on a predefined grid - the snap spacing will help you honour the grid rules for the process, but the DRC rule will be checking against some absolute grid value defined in the design rule manual (I expect).

    Regards,

    Andrew.

Reply

  • There are manufacturing reasons why objects should be on a grid - there is finite resolution during the mask-making process (amongst others).

    Changing the snap spacing will not alter a DRC rule which is expecting the data to be on a predefined grid - the snap spacing will help you honour the grid rules for the process, but the DRC rule will be checking against some absolute grid value defined in the design rule manual (I expect).

    Regards,

    Andrew.

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