ELECTROSTATIC ADSORPTION MEMBER AND SUBSTRATE FIXING DEVICE
An electrostatic adsorption member includes a dielectric member having a first surface and a second surface opposite to the first surface and formed with a through-hole penetrating from the first surface to the second surface, and a porous body provided in the through-hole and having a third surface...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | An electrostatic adsorption member includes a dielectric member having a first surface and a second surface opposite to the first surface and formed with a through-hole penetrating from the first surface to the second surface, and a porous body provided in the through-hole and having a third surface flush with the first surface. The through-hole has a first opening apart from the first surface by a first distance in a first direction perpendicular to the first surface, and a second opening apart from the first surface by a second distance larger than the first distance in the first direction. In a plan view from the first direction, at least a portion of the first opening is inside the second opening, and the porous body has a first portion located inside the first opening, and a second portion connected to the first portion and located outside the first opening. |
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