Patent ID: 11923227
Assignee: KYOCERA CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. An electrostatic chuck comprising:
an insulating base body comprising a predetermined surface; and
an electrode inside the base body, the electrode being layer shaped along the predetermined surface, wherein
an upper surface of the electrode and the base body are in contact, the upper surface facing a side where the predetermined surface is located, and
a gap which is rendered a vacuum or filled with a gas is interposed between a side surface of the electrode and the base body, wherein:
the electrode, in a plan view of the predetermined surface, comprises
a connection portion and
two extending portions extending alongside each other from the connection portion, and

the gap comprises
an outside portion which is in contact with an outside side portion of the connection portion on the side opposite to the extending portions and
an inner side portion which is in contact with an inside side surface of the connection portion located between the two extending portions, a width of the inner side portion from the inside side portion being larger than a width of the outside portion from the outside side surface.