Patent ID: 11935727
Assignee: TOKYO ELECTRON LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  C | IPC B  C  H

Claim 0:
1. A deposit removing method for removing deposits from an inner ring of a substrate processing apparatus comprising a chamber; a susceptor for mounting thereon a substrate provided in the chamber; the inner ring positioned in the chamber so as to surround the susceptor; an outer ring placed so as to surround the inner ring; and a plasma generator configured to generate plasma in the chamber,
wherein the deposit removing method comprises:
lifting the inner ring away from a top surface of the susceptor when the substrate is not on the susceptor, wherein the inner ring is lifted to such a position that a bottom surface of the inner ring is higher than the top surface of the susceptor and deposits adhering to the inner ring are exposed;
generating plasma in the chamber; and
exposing the inner ring to the plasma while the inner ring is lifted to decompose and remove the deposits therefrom.