Patent ID: 6440833
Filing Date: 2002-08-27
Classification: H01L

Abstract:
A method of simultaneously forming a first opening to a metal contact pad structure, and a second opening, overlying a fuse structure, comprising the steps of;providing said fuse structure, embedded in a first insulator layer, and providing a metal interconnect structure, embedded in said first insulator layer, depositing a first composite dielectric layer; forming a dual damascene opening in said first composite dielectric layer, exposing a portion of the top surface of said metal interconnect structure; forming said metal contact pad structure in said dual damascene opening wherein portions of a metal layer, used for sad metal contact pad structure, are removed from top surface of said first composite dielectric layer via a first chemical mechanical polishing (CMP) procedure; performing a selective wet etch procedure to recess said metal contact pad structure below the top surface of said first composite dielectric layer, resulting in a recessed metal contact pad structure; forming a barrier metal shape an the top surface of said recessed metal contact pad structure, via deposit on of a barrier layer and removal of portions of said barrier layer from the top surface of said first composite dielectric layer via a second CMP procedure; depositing a second composite dielectric layer; performing an anisotropic, reactive ion etching, (RIE), procedure to form said first opening in said second composite dielectric layer, exposing a portion of the top surface of said barrier metal shape; and to form said second opening in said second composite dielectric layer, and in a top portion of said first composite dielectric layer, with said second opening overlying a bottom portion of said first composite dielectric layer, which overlays a portion of said fuse structure; depositing a battier metal layer, and an overlying aluminum layer; and patterning of said aluminum layer, and of said barrier metal layer, to form a wire bond pad structure, in said first opening, overlying and contacting said recessed metal contact pad structure; and to form aluminumâ€”barrier metal spacers, on the sides of said second opening.