Invention Application
- Patent Title: TITANIA-DOPED QUARTZ GLASS AND MAKING METHOD
- Patent Title (中): TITANIA-DOPED QUARTZ玻璃和制造方法
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Application No.: US13223808Application Date: 2011-09-01
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Publication No.: US20120058419A1Publication Date: 2012-03-08
- Inventor: Shigeru Maida , Hisatoshi Otsuka , Osamu Sekizawa , Naoki Yanagisawa
- Applicant: Shigeru Maida , Hisatoshi Otsuka , Osamu Sekizawa , Naoki Yanagisawa
- Applicant Address: JP Tokyo
- Assignee: SHIN-ETSU CHEMICAL CO., LTD.
- Current Assignee: SHIN-ETSU CHEMICAL CO., LTD.
- Current Assignee Address: JP Tokyo
- Priority: JP2010-196557 20100902
- Main IPC: C03C14/00
- IPC: C03C14/00 ; G03F1/00 ; C03B19/00

Abstract:
A titania-doped quartz glass suited as an EUV lithographic member is prepared by feeding a silicon-providing reactant gas and a titanium-providing reactant gas through a burner along with hydrogen and oxygen, subjecting the reactant gases to oxidation or flame hydrolysis to form synthetic silica-titania fine particles, depositing the particles on a rotating target, and concurrently melting and vitrifying the deposited particles to grow an ingot of titania-doped quartz glass. The target is retracted such that the growth front of the ingot may be spaced a distance of at least 250 mm from the burner tip.
Public/Granted literature
- US08820122B2 Titania-doped quartz glass and making method Public/Granted day:2014-09-02
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