Patent ID: 7394089

Claim:
A method of forming an electrically re-programmable fuse (eFUSE) device for use in integrated circuit devices, comprising: surrounding an outer surface of an elongated heater element, along a longitudinal axis thereof, with an electrically insulating liner so as to leave opposing ends of the elongated heater element in electrical contact with first and second heater electrodes; surrounding a portion of an outer surface of the electrically insulating liner with a phase change material (PCM) surrounding an outer surface of the PCM with a thermally and electrically insulating layer; and forming first and second fuse electrodes in electrical contact with opposing ends of the PCM; wherein the PCM is encapsulated within the electrically insulating liner, the thermally and electrically insulating layer, and the first and second fuse electrodes, and wherein the first and second heater electrodes are electrically insulated from the first and second fuse electrodes.