Patent ID: 6756255
Filing Date: 2004-06-29
Classification: H01L

Abstract:
A method of forming a polysilicide fuse, the method comprising:forming a polysilicon layer overlying a surface of a silicon substrate, the silicon substrate having a first insulator formed on the surface of the silicon substrate; forming a mask layer over the polysilicon layer, the mask layer exposing an area of the polysilicon layer over the first insulator; etching the exposed area of the polysilicon layer to form an approximate fuse structure; forming a fuse definition mask over the approximate fuse structure, the fuse definition mask exposing an area of the approximate fuse structure; etching the exposed area of the approximate fuse structure to form an actual fuse structure, wherein the exposed area of the approximate fuse structure is etched to a predetermined depth thereby controlling a thickness of a remaining polysilicon layer after annealing; depositing a metal layer over the exposed area of the polysilicon; and annealing the metal layer to form polysilicide.