Patent ID: 8981523
Filing Date: 2015-03-17
Classification: H01L

Abstract:
1. A method of forming an electrically programmable fuse, the method comprising: forming a dummy poly gate structure contacting a surface of a silicon structure, the dummy poly gate structure extending only a part of a length of the silicon structure, wherein the silicon structure is surrounded by at least one shallow trench isolation, and wherein the silicon structure overlies a silicon dioxide layer, wherein the dummy poly gate structure further contacts a surface of the at least one shallow trench isolation; and converting an unobstructed portion of the surface of the silicon structure to silicide to form a thinned strip of the silicide between two end regions, wherein the unobstructed portion of the surface of the silicon structure includes a portion of the surface not contacted by the dummy poly gate structure; and forming an anode contact region and a cathode contact region over distinct areas of the unobstructed portion of the surface layer after the forming of the dummy poly gate structure and the converting of the silicon structure to the silicide, wherein the anode contact region and the cathode contact region each include a conductive material, wherein the dummy poly gate structure remains in contact with the surface of the silicon structure after the forming of the anode contact region and the cathode contact region.