公开(公告)号：US12014947B2

公开(公告)日：2024-06-18

申请号：US17690337

申请日：2022-03-09

Applicant: TOTO LTD.

Inventor： Jun Shiraishi ,  Shuichiro Saigan ,  Tatsuya Mori ,  Masahiro Watanabe

IPC: H01L21/683

CPC classification number: H01L21/6833

Abstract: 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. The base plate supports the ceramic dielectric substrate and includes a gas feed channel. The first porous part is provided between the base plate and the first major surface. The ceramic dielectric substrate includes a first hole part. The first porous part includes a porous section, and a first compact section being more compact than the porous section. The porous section including a plurality of sparse portions including a plurality of pores including a first pore and a second pore, and a dense portion having a higher density than the sparse portion.

公开(公告)号：US11626310B2

公开(公告)日：2023-04-11

申请号：US16576289

申请日：2019-09-19

Applicant: TOTO LTD.

Inventor： Jun Shiraishi ,  Shuichiro Saigan ,  Tatsuya Mori ,  Masahiro Watanabe

IPC: H01L21/683 ,  H05K1/03

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.

公开(公告)号：US11309204B2

公开(公告)日：2022-04-19

申请号：US16576220

申请日：2019-09-19

Applicant: TOTO LTD.

Inventor： Jun Shiraishi ,  Shuichiro Saigan ,  Tatsuya Mori ,  Masahiro Watanabe

IPC: H01L21/683

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. The base plate supports the ceramic dielectric substrate and includes a gas feed channel. The first porous part is provided between the base plate and the first major surface. The ceramic dielectric substrate includes a first hole part. The first porous part includes a porous section, and a first compact section being more compact than the porous section. As projected on a plane perpendicular to a first direction from the base plate to the ceramic dielectric substrate, the first compact section is configured to overlap the first hole part, and the porous section is configured not to overlap the first hole part.

公开(公告)号：US12198964B2

公开(公告)日：2025-01-14

申请号：US16810272

申请日：2020-03-05

Applicant: TOTO LTD.

Inventor： Jun Shiraishi ,  Shuichiro Saigan ,  Tatsuya Mori ,  Yuki Sasaki ,  Masahiro Watanabe

IPC: H01L21/683 ,  C23C16/455 ,  C23C16/458 ,  H01J37/32 ,  H01L21/67 ,  H01L21/687

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 includes first and second major surfaces. The second major surface is opposite to the first major surface. The base plate supports the ceramic dielectric substrate and includes a gas feed channel. The first porous part is provided in the ceramic dielectric substrate and is opposite to the gas feed channel. The first porous part includes a first porous region, and a first dense region denser than the first porous region. The first porous region includes first sparse portions, and a first dense portion. The first sparse portions include pores. The first dense portion has a higher than the first sparse portions. The first dense portion is positioned between the first sparse portions. The first sparse portions include a first wall part provided between the pores.

公开(公告)号：US11276602B2

公开(公告)日：2022-03-15

申请号：US16810404

申请日：2020-03-05

Applicant: TOTO LTD.

Inventor： Jun Shiraishi ,  Shuichiro Saigan ,  Tatsuya Mori ,  Masahiro Watanabe ,  Yuki Sasaki

IPC: H01L21/683 ,  H01J37/32 ,  H01L21/67

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 includes first and second major surfaces, and at least one groove. The second major surface is opposite to the first major surface. The base plate supports the ceramic dielectric substrate and includes a gas feed channel. The first porous part is provided between the groove and the gas feed channel. The ceramic dielectric substrate includes holes communicating with the groove and the gas feed channel and piercing the ceramic dielectric substrate in a first direction from the base plate toward the ceramic dielectric substrate. The first porous part includes at least one porous region including pores, and at least one dense region denser than the porous region. The porous region further includes at least one dense part.

公开(公告)号：US11417556B2

公开(公告)日：2022-08-16

申请号：US16810482

申请日：2020-03-05

Applicant: TOTO LTD.

Inventor： Jun Shiraishi ,  Shuichiro Saigan ,  Tatsuya Mori ,  Masahiro Watanabe ,  Yuki Sasaki

IPC: H01L21/683 ,  H01L21/67 ,  H01J37/32 ,  C23C16/458 ,  C23C16/455 ,  H01L21/687

Abstract: According to one embodiment, an electrostatic chuck includes a ceramic dielectric substrate, a base plate, and first and second porous parts. The ceramic dielectric substrate includes first and second major surfaces. The second major surface is opposite to the first major surface. The base plate supports the ceramic dielectric substrate and includes a gas feed channel. The first porous part is provided in the ceramic dielectric substrate and is opposite to the gas feed channel. The second porous part is provided in the base plate and is opposite to the gas feed channel. The ceramic dielectric substrate includes a first hole part positioned between the first major surface and the first porous part. The first porous part includes a first porous region including pores and a first dense region. The second porous part includes a second porous region including pores and a second dense region.