Hi @Tim Edwards, we just met one npc.2 violation during klayout_feol_check stage in precheck, saying that the spacing is too small (min. npc spacing). We checked the npc.drawing layer in klayout and found the minimum spacing is between

sky130_fd_sc_hd_and3_1

and

sky130_fd_sc_hd_conb_1

. Actually

sky130_fd_sc_hd_and2_0

has the same issue before, where the NPC of this cell stretches too far. We’re wondering whether the

sky130_fd_sc_hd_and3_1

has the same issue? Or do you have any suggestion for this problem? Thanks!

Yes, I can confirm that the

sky130_fd_sc_hd__and3_1

cell has the same issue. And unfortunately, there is no

_0

version of that cell, and the

_2

version is wider. I'm tempted to tell SkyWater to deal with it, but I guess I will try to work up corrected versions of the GDS.

Thanks for the information! We’ve tried to disable and3_1 cells first to see whether the same issue still exists.