Patent ID: 11955534
Assignee: INTEL CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method of fabricating an integrated circuit structure, the method comprising:
forming a first plurality of conductive interconnect lines in and spaced apart by a first dielectric layer above a substrate, wherein individual ones of the first plurality of conductive interconnect lines are along a first direction, and wherein forming individual ones of the first plurality of conductive interconnect lines comprises:
forming a first conductive barrier material; and
forming a first conductive fill material having sidewalls and a bottom, the first conductive fill material having a composition, wherein the first conductive barrier material is along the sidewalls and the bottom of the first conductive fill material, the first conductive barrier material is in contact with the first dielectric layer and with the first conductive fill material, and the first conductive barrier material has a first composition; and
forming a second plurality of conductive interconnect lines in and spaced apart by a second dielectric layer above the first dielectric layer, wherein individual ones of the second plurality of conductive interconnect lines are along a second direction orthogonal to the first direction, wherein a conductive via couples one of the first plurality of conductive interconnect lines directly to one of the second plurality of conductive interconnect lines, and wherein forming individual ones of the second plurality of conductive interconnect lines comprises:
forming a second conductive barrier material; and
forming a second conductive fill material having sidewalls and a bottom, the second conductive fill material having a composition, the composition of the second conductive fill the same as the composition of the first conductive fill, wherein the second conductive barrier material is along the sidewalls and the bottom of the second conductive fill material, the second conductive barrier material is in contact with the second dielectric layer and with the second conductive fill material, and the second conductive barrier material has a second composition different than the first composition of the first conductive barrier material.