Patent ID: 6261937
Filing Date: 2001-07-17
Classification: H01L

Abstract:
A method for forming a fuse for a semiconductor integrated circuit, the circuit having an active device, said method comprising the steps of:forming a fuse and an active device in different regions of a semiconductor substrate;forming a dielectric layer over the fuse and over the active device;forming via holes through selected regions of the dielectric layer exposing underlying portions of the fuse and underlying portions of a contact region of the active device;depositing an electrically conductive material over the dielectric layer and through the via holes onto exposed portions of the fuse and the contact region;selectively removing portions of the electrically conductive material deposited onto the fuse while leaving portions of the electrically conductive material deposited onto the contact region of the active device;forming a second dielectric layer over the electrically conductive material;forming a second via hole through the second dielectric layer expositing an underlying portion of a portion of the electronically conductive material deposited onto the contact region of the active device;forming a metalization layer over the second dielectric layer of a material different from material of the electrically conductive material, a portion of such metalization layer being deposited through the second via hole onto the exposed underlying portion of the electrically conductive material deposited onto the contact region of the active device; andforming a third via hole through the second dielectric over the fuse and over a portion of the metalization layer.