A programmable device is provided by a thin-oxide avalanche fuse element which is programmed at a voltage below the oxide breakdown level. This device may be used to fix the addresses of faulty rows or columns in a memory having redundant or substitute cells. Upon breakdown, the thin oxide is perforated...http://www.google.se/patents/US4562639?utm_source=gb-gplus-sharePatent US4562639 - Process for making avalanche fuse element with isolated emitter
