Patent ID: 11909335
Assignee: SHINKO ELECTRIC INDUSTRIES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electrostatic chuck comprising:
a base body having a placement surface on which a suction target object is placed;
an electrode embedded in the base body; and
a gas discharge portion,
wherein the base body is provided with a groove that opens to the placement surface-side and does not reach the electrode,
wherein a low-resistance region made of ceramics and a high-resistance region made of ceramics having a volume resistivity higher than the low-resistance region are sequentially arranged from a side close to the groove between a bottom surface of the groove and the electrode, in a thickness direction of the base body, and
wherein the gas discharge portion opens to the bottom surface of the groove, and the gas discharge portion is formed to penetrate the high-resistance region.