Patent ID: 11948836
Assignee: APPLIED MATERIALS, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. An electronic device comprising:
a substrate comprising a dielectric layer and having at least one trench formed in the dielectric layer, the at least one trench having a top, two sidewalls, and a bottom, wherein the dielectric layer has a thickness in a range of 10 nm to 2 μm and wherein the dielectric layer comprises a dielectric material having a k-value less than 5;
an annealed non-nitride based metallic tungsten layer formed on the at least one trench, wherein the annealed non-nitride based metallic tungsten layer is formed by exposing the substrate to a plasma formed from a first gas, followed by an annealing process, the first gas consisting of a metallic tungsten precursor gas selected from the group consisting of a fluorine free tungsten halide precursor, a fluorine free tungsten oxy-halide precursor, and a fluorine-free, chlorine-free tungsten precursor, a hydrogen containing gas, and an inert gas, is fluorine-free and chlorine-free and has a thickness in a range of from 5 Å to 35 Å and a resistivity less than 20 ohms-cm; and
an annealed cobalt film formed on the annealed non-nitride based metallic tungsten layer, wherein the annealed cobalt film does not show any de-wetting on the annealed non-nitride based metallic tungsten layer.