Patent ID: 11967534
Assignee: KOKUSAI ELECTRIC CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC C  H | IPC H

Claim 0:
1. A method of manufacturing a semiconductor device, comprising:
(a) supplying a gas to a process vessel through a plurality of branch pipes while a plurality of substrates are placed on a plurality of substrate placing surfaces arranged in the process vessel, respectively;
(b) detecting at least one among: information of a component corresponding to each of the substrate placing surfaces; and an amount of the gas supplied to each of the branch pipes;
(c) determining a state level of each of the substrate placing surfaces based on the detected information, wherein the state level comprises a thickness of a film formed on a substrate non-placing surface other than the substrate placing surfaces of a substrate support; and
(d) selecting a substrate placing surface among the plurality of substrate placing surfaces to which a substrate subsequently loaded into the process vessel is to be transferred next according to the state level of each of the substrate placing surfaces.