A metal-to-metal conductive plug-type antifuse has a conductive plug disposed in an opening in an insulating layer. A programmable material feature (for example, amorphous silicon) overlies the conductive plug. A conductor involving a metal (for example, aluminum or copper) that migrates in the programmable...http://www.google.de/patents/US6627969?utm_source=gb-gplus-sharePatent US6627969 - Metal-to-metal antifuse having improved barrier layer
