US 12,264,095 B2
Reflective member and glass layered member production method
Toru Segawa, Tokyo (JP); Kazuhiro Yamaguchi, Tokyo (JP); Tomonori Watanabe, Tokyo (JP); and Daiki Fujita, Yamagata (JP)
Assigned to Shin-Etsu Quartz Products Co., Ltd., Tokyo (JP); and Heraeus Quarzglas GmbH & Co. KG, Hanau (DE)
Appl. No. 17/642,525
Filed by SHIN-ETSU QUARTZ PRODUCTS CO., LTD., Tokyo (JP); and HERAEUS QUARZGLAS GMBH & CO. KG, Hanau (DE)
PCT Filed Aug. 17, 2020, PCT No. PCT/JP2020/031011
§ 371(c)(1), (2) Date Mar. 11, 2022,
PCT Pub. No. WO2021/049256, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 2019-167467 (JP), filed on Sep. 13, 2019.
Prior Publication US 2022/0324740 A1, Oct. 13, 2022
Int. Cl. B32B 15/04 (2006.01); B32B 5/16 (2006.01); B32B 17/06 (2006.01); C03B 19/06 (2006.01); C03B 23/203 (2006.01); C03C 3/076 (2006.01)
CPC C03B 19/066 (2013.01) [B32B 5/16 (2013.01); B32B 17/06 (2013.01); B32B 17/068 (2013.01); C03B 19/063 (2013.01); C03B 23/203 (2013.01); B32B 2255/20 (2013.01); B32B 2264/1021 (2020.08); B32B 2307/416 (2013.01); C03C 3/076 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A reflective member comprising:
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,
wherein 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,
wherein, 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, and
wherein the laminated structure includes, in a boundary between the opaque siliceous sintered powder layer and each of the transparent quartz glass members of the laminated structure, 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.