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:
Apr. 01, 2025
Filed:
Aug. 17, 2020
Shin-etsu Quartz Products Co., Ltd., Tokyo, JP;
Heraeus Quarzglas Gmbh & Co. KG, Hanau, DE;
Toru Segawa, Tokyo, JP;
Kazuhiro Yamaguchi, Tokyo, JP;
Tomonori Watanabe, Tokyo, JP;
Daiki Fujita, Yamagata, JP;
Shin-Etsu Quartz Products Co., Ltd., Tokyo, JP;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
One aspect is a reflective member, which has a laminated structure in which transparent quartz glass members are formed on an upper surface and a lower surface of an opaque siliceous sintered powder layer. The opaque siliceous sintered powder layer has a thickness of 0.1 mm or more and a thickness distribution of ±0.05 mm or less. When a load is applied to each of the transparent quartz glass members on an upper surface and a lower surface of the laminated structure in a direction parallel to the laminated structure, the reflective member is fractured at a load of 5 N or more per square centimeter. The laminated structure includes a semi-transparent portion having a width of 0.01 mm or less, which has an intermediate opacity between an opacity of the opaque siliceous sintered powder layer and an opacity of each of the transparent quartz glass members.