Method of forming surface treatment film
A method of forming a surface treatment film on a substrate having, on a surface thereof, a first region where an insulator is exposed and a second region where at least one metallic matter is exposed, in which the surface treatment film is formed on the second region and is capable of suppressing intrusion of the surface treatment film onto the first region. A method of forming a surface treatment film, including preparing the substrate, oxidizing a surface of the second region, and forming a surface treatment film on the second region by exposing a surface of the substrate after the oxidation to a surface-treatment agent including a thiol having 8 or less carbon atoms.
1 . A method of forming a surface treatment film, comprising preparing a substrate having, on a surface thereof, a first region where an insulator is exposed and a second region where at least one metallic matter selected from a metal or a conductive metal-containing compound is exposed,
oxidizing a surface of the second region, and
exposing the surface of the substrate after the oxidizing to a surface-treatment agent comprising a thiol having 8 or fewer carbon atoms to form the surface treatment film on the second region, wherein the surface treatment film has a thickness of 10 nm or more, and
wherein the formation of the surface treatment film is configured to suppress an overhang of a second insulator formed on the insulator deposited on the first region.
2 . The method of claim 1 , wherein the insulator has a recess on a surface of the substrate and the second region where the metallic matter is exposed is formed in the recess.
3 . The method of claim 1 , wherein the insulator is at least one selected from the group consisting of silicon oxide, aluminum oxide, titanium oxide, zirconium oxide, hafnium oxide, tantalum oxide, a fluorine-containing silicon oxide, a carbon-containing silicon oxide, silicon nitride, boron nitride, silicon carbide, silicon carbonitride, silicon oxynitride, silicon oxycarbonitride, silicon, and silicon doped with at least one selected from phosphorus, boron, or germanium, and
the metallic matter is at least one selected from the group consisting of copper, cobalt, molybdenum, and ruthenium.
4 . The method of claim 1 , wherein the thiol includes at least one selected from the group consisting of butanethiol, pentanethiol, hexanethiol, heptanethiol, of and octanethiol.
5 . The method of claim 1 , further comprising cleaning the substrate having the surface treatment film formed thereon, with a solvent after the exposing.
6 . The method of claim 5 , wherein the solvent includes a fatty acid alkyl ester.