Hi all, I encountered a weird DRC error when implementing DNW: Rules has it that the DNW need to be surrounded by Pdiff. But when I do that, a new DRC error DF.14_3.3V is raised, stating that the distance requirement between (PCOMP outside Nwell) and (NCOMP outside Nwell) is not met . I don't quite understand the meaning of it.

The DNW must be surrounded by NW with some overlap between the two. There is a hole in the DNW, where must be a PW. All those areas must be connected to a tap. My designs using Magic are ok.

Thanks! I'll give it a try

@Luis Henrique Rodovalho: That's the SkyWater rule. The GF deep nwell structure is different and does not require a surrounding nwell.

@proppy This is the issue we have with DNW

@Sachin Nadig was mentioning extraction issue with pmos that have deep n well with magic, so he might be interested by that thread.

Some time ago I had an issue with magic extraction. I had two isolated nmos devices in the same cell with bulk terminals connected to different nodes. The extraction was ok. But for different subcircuits in the same cell with isolated nmos, the connections were shorted. It was SKY130, anyway. I'll try it later.