GLASS FOR SUBSTRATE

WIPO Patent Application WO/2008/075546

A1

Disclosed is a glass for a substrate, which shows a transmittance of light having a wavelength of 5.5 μm of 50% or more and a transmittance of light having a wavelength of 7.0 μm of 10% or less when prepared in a thickness of 1 mm. Specifically disclosed is a glass for a substrate, which comprises (by mole, in terms of oxide): 10 to 55% of Bi2O3; 20 to 85% of GeO2; 0 to 19% of Ga2O3; and 0 to 15% of Al2O3, wherein the sum total of Bi2O3 and GeO2 accounts for 50% or more and, when MgO is contained, the sum total of Ga2O3 and MgO accounts for 20% or less. In the glass, the content of Bi2O3 may be 15% or more, the content of GeO2 may be 80% or less, and the sum total of Ga2O3 and Al2O3 may account for 2 to 30%. In the glass, the sum total of GeO2 and Al2O3 may account for 60% or more. The glass may have a glass transition temperature of 400˚C or higher.

OHARA, Seiki (Limited 12-1, Yurakucho1-chome, Chiyoda-k, Tokyo 05, 1008405, JP)
大原 盛輝 (〒05 東京都千代田区有楽町一丁目１２番１号 旭硝子株式会社内 Tokyo, 1008405, JP)
KONDO, Yuki (Limited 12-1, Yurakucho1-chome, Chiyoda-k, Tokyo 05, 1008405, JP)

JP2007/073157

June 26, 2008

November 30, 2007

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ASAHI GLASS COMPANY, LIMITED (12-1, Yurakucho 1-chome Chiyoda-k, Tokyo 05, 1008405, JP)
旭硝子株式会社 (〒05 東京都千代田区有楽町一丁目１２番１号 Tokyo, 1008405, JP)
OHARA, Seiki (Limited 12-1, Yurakucho1-chome, Chiyoda-k, Tokyo 05, 1008405, JP)
大原 盛輝 (〒05 東京都千代田区有楽町一丁目１２番１号 旭硝子株式会社内 Tokyo, 1008405, JP)

C03C4/10; C03C3/062; C03C3/064; C03C3/068; C03C3/253; C03C4/00; C03C3/062; C03C3/12

SENMYO, Kenji et al. (4th Floor, SIA Kanda Square17, Kanda-konyacho, Chiyoda-ku, Tokyo 35, 1010035, JP)

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