@User: An "antifuse" is a specific technology that sky130 doesn't have. The choices for sky130 are: sonos flash or m3 (?) fuse. The fuse component is iffy because I have not seen any documentation on the specs for blowing the fuse (I have, however, in a previous job, designed fuse programming circuits and fuse banks, largely from scratch, but with significant documentation from the foundry on how to blow the fuse). We also have limited information on creating a sonos flash cell, but we do (under NDA) have a completed sonos memory bank design to stare at and reverse-engineer the programming controls if we have to.