ELECTROSTATIC CHUCK
First Claim
1. An electrostatic chuck comprising:
- a ceramic dielectric substrate having a first major surface for mounting a suction target and a second major surface on opposite side from the first major surface;
a base plate supporting the ceramic dielectric substrate and including a gas feed channel; and
a first porous part provided at a position between the base plate and the first major surface of the ceramic dielectric substrate, the position being opposed to the gas feed channel,the first porous part including a plurality of sparse portions each including a plurality of pores, the plurality of sparse portions being spaced from each other, andeach of the plurality of sparse portions extending in a direction inclined by a prescribed angle with respect to a first direction from the base plate to the ceramic dielectric substrate.
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Accused Products
Abstract
According to one embodiment, an electrostatic chuck includes a ceramic dielectric substrate, a base plate, and a first porous part. The ceramic dielectric substrate has a first major surface and a second major surface on opposite side from the first major surface. The base plate supports the ceramic dielectric substrate and includes a gas feed channel. The first porous part is provided at a position between the base plate and the first major surface of the ceramic dielectric substrate. The position is opposed to the gas feed channel. The first porous part includes a plurality of sparse portions each including a plurality of pores. The plurality of sparse portions are spaced from each other. Each of the plurality of sparse portions extends in a direction inclined by a prescribed angle with respect to a first direction from the base plate to the ceramic dielectric substrate.
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Citations
17 Claims
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1. An electrostatic chuck comprising:
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a ceramic dielectric substrate having a first major surface for mounting a suction target and a second major surface on opposite side from the first major surface; a base plate supporting the ceramic dielectric substrate and including a gas feed channel; and a first porous part provided at a position between the base plate and the first major surface of the ceramic dielectric substrate, the position being opposed to the gas feed channel, the first porous part including a plurality of sparse portions each including a plurality of pores, the plurality of sparse portions being spaced from each other, and each of the plurality of sparse portions extending in a direction inclined by a prescribed angle with respect to a first direction from the base plate to the ceramic dielectric substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification