Patent ID: 6767769
Filing Date: 2004-07-27
Classification: H01L

Abstract:
A method of fabricating a metal-to-metal antifuse, comprising:planarizing an insulating layer and a tungsten plug; forming an antifuse layer over said insulating layer and said tungsten plug, wherein said antifuse layer comprises a lower adhesion-promoting layer, an upper adhesion promoting layer, and a middle layer comprising a material selected from a group consisting of at least one of amorphous carbon and amorphous carbon doped with at least one of hydrogen and fluorine; forming a barrier metal layer over said antifuse layer; forming at least one of an oxide layer and a tungsten layer over said barrier metal layer; forming a layer of photoresist over at least one of said oxide layer and said tungsten layer; defining at least one of said oxide layer and said tungsten layer; removing said photoresist; and defining said antifuse layer and said barrier metal layer.