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Patent Searching and Data


Title:
QUARTZ GLASS CRUCIBLE AND METHOD OF MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2019/193851
Kind Code:
A1
Abstract:
The present invention is a quartz glass crucible comprising a bottom, a curved part, and a straight trunk. The crucible has an outer layer comprising bubble-containing opaque quartz glass, and an inner layer comprising transparent quartz glass. The outer layer is made from the same type or two or more different types of raw material powder, and comprises two or more sections differentiated by bubble content density, wherein, defining da (pcs/mm3) as the bubble content density of a section a, among two adjacent sections of the outer layer, having the greater bubble content density, and db (pcs/mm3) as the bubble content density of a section b having the smaller bubble content density, the bubble content density difference D = (da – db)/db between the two adjacent sections is at least 10%. As a result, it is possible to impart different functions to different sections of the outer layer of the quartz glass crucible.

Inventors:
BABA Yuji (Shin-Etsu Quartz Products Co. Ltd., 13-60, Kitago 2-chome, Echizen-sh, Fukui 35, 〒9158535, JP)
Application Number:
JP2019/005945
Publication Date:
October 10, 2019
Filing Date:
February 19, 2019
Export Citation:
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Assignee:
SHIN-ETSU QUARTZ PRODUCTS CO., LTD. (1-22-2, Nishi-Shinjuku Shinjuku-k, Tokyo 23, 〒1600023, JP)
International Classes:
C30B29/06; C03B20/00; C30B15/10
Domestic Patent References:
WO2011030657A12011-03-17
Foreign References:
JP2011073925A2011-04-14
JP2012116716A2012-06-21
JP2010155765A2010-07-15
JP2018039702A2018-03-15
JP2010275151A2010-12-09
JP2008169106A2008-07-24
JP2010241623A2010-10-28
Attorney, Agent or Firm:
YOSHIMIYA Mikio et al. (1st Shitaya Bldg. 8F, 6-11 Ueno 7-chome, Taito-k, Tokyo 05, 〒1100005, JP)
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