Patent ID: 11887821
Assignee: TOKYO ELECTRON LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. A plasma processing apparatus comprising:
a processing container;
a stage disposed inside the processing container and configured to place a substrate thereon; and
an edge ring configured to surround a periphery of the substrate placed on the stage,
wherein the edge ring includes:
a first edge ring integrally formed by silicon carbide, a top surface of the first edge ring being a contact surface with plasma generated inside the processing container; and
a second edge ring formed by silicon, a top surface of the second edge ring being bonded to a side opposite to the contact surface of the first edge ring, and a bottom surface of the second edge ring contacting with an electrostatic chuck,
wherein the second edge ring is divided into a plurality of parts in a circumferential direction, and a groove is formed between each of the plurality of parts such that adjacent parts of the second edge ring have a predetermined distance therebetween in the circumferential direction, and
wherein the groove is formed by side walls of the adjacent parts of the second edge ring, and a bottom wall of the first edge ring that serves as a ceiling wall when viewed in a vertical cross section.