Question related to M5, M6 spacing?

[sakundu]

In the Post-Route-Opt database of one of our internal design on ASAP7, we noticed lots of spacing DRC. After further analysis we found that for M6 the minimum spacing requirement is 0.128. But, the required spacing is 0.288 according to the parallel run length spacing table. Which indicates that we always need to maintain 0.288 spacing between two M6 shapes. So, is this spacing rule correct?

Additionally, if we need a 0.288 spacing, is it acceptable to adjust the M6 layer pitch to 0.416 (combining 0.288 spacing and 0.128 width)?

[maliberty]

In https://github.com/The-OpenROAD-Project/asap7/blob/master/asap7sc7p5t_28/techlef_misc/asap7_tech_4x_201209.lef it seems correct. I'm guessing this is a bug.

[maliberty]

It looks like Anton fixed the one above in b86c7e9 - I guess the same fix is needed for the version you are using.

[maliberty]

If you want to make a similar PR I'm fine with approving it.