Invention Grant
- Patent Title: Silica container and method for producing the same
- Patent Title (中): 二氧化硅容器及其制造方法
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Application No.: US13861700Application Date: 2013-04-12
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Publication No.: US09403620B2Publication Date: 2016-08-02
- Inventor: Shigeru Yamagata , Tomomi Usui
- Applicant: SHIN-ETSU QUARTZ PRODUCTS CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: SHIN-ETSU QUARTZ PRODUCTS CO., LTD.
- Current Assignee: SHIN-ETSU QUARTZ PRODUCTS CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2009-280417 20091210
- Main IPC: B65D13/02
- IPC: B65D13/02 ; C03B19/09 ; C30B15/10 ; C30B29/06 ; C30B35/00

Abstract:
A silica container contains a substrate having a rotational symmetry, containing mainly a silica, and gaseous bubbles in a peripheral part of the substrate; a transparent silica glass in an inner peripheral part of the substrate; and an inner layer, formed on an inner surface of the substrate and containing a transparent silica glass; wherein the substrate contains Li, Na, and K in a total concentration of 50 or less ppm by weight; the substrate has a linear light transmittance of 91.8% to 93.2% at a light wavelength of 600 nm; the inner layer contains Li, Na, and K in a total concentration of 100 or less ppb by weight and at least one of Ca, Sr, and Ba in a total concentration of 50 to 2000 ppm by weight; and the inner layer has a linear light transmittance of 91.8% to 93.2% at a light wavelength of 600 nm.
Public/Granted literature
- US20130248408A1 SILICA CONTAINER AND METHOD FOR PRODUCING THE SAME Public/Granted day:2013-09-26
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