Method of forming conductive interconnect structure
First Claim
Patent Images
1. A method for forming a conductive interconnect in an integrated circuit comprising the steps of:
- providing a semiconductor substrate;
forming a dielectric layer overlying the semiconductor substrate;
forming a conductive metal layer overlying the dielectric layer;
forming a silicon adhesion layer overlying the conductive metal layer;
forming an inorganic anti-reflective layer overlying the silicon adhesion layer;
etching the inorganic anti-reflective layer to form a remaining portion of the inorganic anti-reflective layer; and
etching the conductive metal layer to form the conductive interconnect, wherein the remaining portion of the inorganic anti-reflective layer overlies the conductive interconnect.
18 Assignments
0 Petitions
Accused Products
Abstract
In one embodiment, delamination of a patterned silicon nitride anti-reflective layer (26) from an underlying patterned tungsten silicide layer (32), is prevented by forming a thin silicon layer (30) between the patterned tungsten silicide layer (32) and the overlying patterned silicon nitride anti-reflective layer (26).
72 Citations
22 Claims
-
1. A method for forming a conductive interconnect in an integrated circuit comprising the steps of:
-
providing a semiconductor substrate; forming a dielectric layer overlying the semiconductor substrate; forming a conductive metal layer overlying the dielectric layer; forming a silicon adhesion layer overlying the conductive metal layer; forming an inorganic anti-reflective layer overlying the silicon adhesion layer; etching the inorganic anti-reflective layer to form a remaining portion of the inorganic anti-reflective layer; and etching the conductive metal layer to form the conductive interconnect, wherein the remaining portion of the inorganic anti-reflective layer overlies the conductive interconnect. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for forming a conductive interconnect in an integrated circuit comprising the steps of:
-
providing a semiconductor substrate; forming a dielectric layer overlying the semiconductor substrate; forming a metal layer overlying the dielectric layer; forming a silicon adhesion layer overlying the metal layer; forming a layer comprising silicon and nitrogen overlying the silicon adhesion layer; etching the layer comprising silicon and nitrogen to form a remaining portion of the layer comprising silicon and nitrogen; and etching the metal layer to form the conductive interconnect, wherein the remaining portion of the layer comprising silicon and nitrogen overlies the conductive interconnect. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for forming a conductive interconnect in an integrated circuit comprising the steps of:
-
providing a semiconductor substrate; forming a dielectric layer overlying the semiconductor substrate; forming a polysilicon layer overlying the dielectric layer; forming a tungsten silicide layer overlying the polysilicon layer; forming an amorphous silicon adhesion layer overlying the tungsten silicide layer; forming an anti-reflective layer comprising silicon and nitrogen overlying the amorphous silicon adhesion layer; etching the anti-reflective layer to form a remaining portion of the anti-reflective layer; and etching the polysilicon layer to form the conductive interconnect, wherein the remaining portion of the anti-reflective layer overlies the conductive interconnect. - View Dependent Claims (18, 19, 20, 21, 22)
-
Specification