The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2022
Filed:
Aug. 27, 2020
Ebara Corporation, Tokyo, JP;
Cheng Cheng, Tokyo, JP;
Shingo Togashi, Tokyo, JP;
Makoto Fukushima, Tokyo, JP;
Kazuto Hirokawa, Tokyo, JP;
EBARA CORPORATION, Tokyo, JP;
Abstract
An elastic membrane capable of being easily secured to a head body of a substrate holding apparatus while inhibiting variation of a degree of deformation of the elastic membrane in a circumferential direction is disclosed. The elastic membrane according to the present invention is used in the substrate holding apparatus. The elastic membrane includes: a contact portion to be brought into contact with a substrate for pressing the substrate against a polishing pad; and an edge circumferential wall extending from a peripheral edge of the contact portion. The edge circumferential wall includes an edge-circumferential-wall lip portion sandwiched between a head body of the substrate holding apparatus and an edge mounting member for securing the edge circumferential wall to the head body. The edge-circumferential-wall lip portion has at least a part of a surface thereof roughened.