Patent ID: 11894219
Assignee: SEMES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for processing a substrate, the method comprising:
processing the substrate by supplying plasma onto the substrate placed on a support; and
controlling a plasma density above an edge ring by adjusting a dielectric constant of a dielectric substance with ring shape placed below the edge ring, the edge ring being configured to surround a side of the substrate placed on the support,
wherein the dielectric substance with ring shape has a highest dielectric constant at a first temperature, an increasing dielectric constant with a temperature rise in a range below the first temperature, and a decreasing dielectric constant with a temperature rise in a range above the first temperature, and
wherein temperature of the dielectric substance with ring shape is raised in the range below the first temperature and lowered in the range above the first temperature when an amount of corrosion of the edge ring increases.