Patent ID: 11862488
Assignee: TOKYO ELECTRON LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A substrate stage comprising:
a stage body having a substrate placing surface on which a substrate is placed in a processing apparatus that performs a processing on the substrate; and
a thermocouple configured to detect a temperature near the substrate placing surface of the stage body,
wherein the thermocouple includes a temperature gauge formed by stacking a first metal film and a second metal film on a surface on a side of the substrate placing surface of the stage body,
the stage body includes a plurality of protrusions defining a recess of the stage body,
the temperature gauge is disposed between the plurality of protrusions in the recess of the stage body,
the first metal film is in contact with a bottom surface of the recess of the stage body,
an upper surface of the second metal film on the first metal film is disposed lower than an upper surface of the plurality of protrusions defining the recess of the stage body thereby providing a space between the upper surface of the second metal film and the substrate when the substrate is disposed on the substrate placing surface, and
a contact surface between the substate and the plurality of protrusions is larger than a non-contact surface between the substate and the plurality of protrusions in a plan view when the substrate is disposed on the substrate placing surface.