Patent ID: 11875996
Assignee: APPLIED MATERIALS, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC H

Claim 6:
7. A method of depositing a copper material on a seed layer, comprising:
depositing a barrier layer of titanium material on a substrate, wherein the barrier layer provides adhesion for the seed layer and inhibits migration of the copper material;
forming at least one isolated seed layer area on the barrier layer on the substrate, wherein the at least one isolated seed layer area is completely separated from any other portions of the seed layer, and wherein the at least one isolated seed layer is formed by depositing the seed layer on the barrier layer and etching the seed layer to create at least one exposed portion of the barrier layer;
performing an oxygen-based descum process after etching the seed layer to oxidize the at least one exposed portion of the barrier layer to inhibit electrochemical deposition on the barrier layer; and
depositing the copper material on the at least one isolated seed layer area using an electrochemical deposition process, wherein the barrier layer provides a current path to deposit the copper material on the at least one isolated seed layer area.