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how to fix metal spacing DRCs

Tool: Detailed Routing

Subcategory: DRC violation

Conversation

gkamendje

After 64 iterations DRT stopped on my design a generated a DRC report. It turns out that most of the DRC are related to METAL1 spacing (with net VSS) and Metal SpacingTableTw. The design is not very congested so I wonder why the tool could not fix these rules. Could it be that I am missing something here (maybe something in my platform definition)? Is there a way to fix these violations? image

image

maliberty

Can you provide a test case?

maliberty

You have very wide METAL1 power stripes:

image

The pin is less than the min space (0.19 < 0.23) from the stripe so there is always going to be a DRC error here. You need to adjust your PDN definition to be resolve this.