Patent ID: 11908737
Assignee: KOKUSAI ELECTRIC CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A substrate processing apparatus, comprising:
a process chamber in which a substrate, which has a concave portion in a surface of the substrate, is processed;
a gas supply system configured to supply a first metal-containing gas, a second metal-containing gas, a first reducing gas, a second reducing gas, and an etching gas, to the substrate in the process chamber; and
a controller configured to control the gas supply system so as to perform, in the process chamber:
(a) forming a first metal film to fill completely the concave portion by supplying a plurality of times the first metal-containing gas and the first reducing gas without being mixed with each other or by simultaneously supplying the first metal-containing gas and the first reducing gas, to the substrate;
(b) forming a second metal film on the first metal film by supplying a plurality of times at least the second metal-containing gas and the second reducing gas without being mixed with each other or by simultaneously supplying at least the second metal-containing gas and the second reducing gas, to the substrate; and
(c) etching an upper portion of the first metal film and the second metal film by supplying the etching gas to the substrate,

wherein in (a), a thickness of the first metal film before performing (c) is 1.2 times or less of a thickness of the first metal film remaining after performing (c), and
wherein (c) is performed after (a) and (b).