GAA Backside-Power eFuse with 0.72um2 Bitcell, 1.59V Field Program, On-Demand Read and 1.8V Standby

A 4Kb eFuse IP featuring the smallest 0.72um2 bit cell is presented in the first Gate All Around (GAA) and backside power delivery 18A class process. A low leakage integrated power switch is developed to support an always-ON 1.8V rail with power sequence independent nominal and 1.8V rails. The IP enables 1.59V charge-pump-free in-field programming and 0.58V 1e9 cycles for on-demand read from −40°C to 125°C with a raw bit fail rate <3 DPM (defect per million), achieving 100% post-repair die yield with up to one billion bits per die.