Invention Application
US20120058419A1 TITANIA-DOPED QUARTZ GLASS AND MAKING METHOD 有权
TITANIA-DOPED QUARTZ玻璃和制造方法

TITANIA-DOPED QUARTZ GLASS AND MAKING METHOD
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.
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