Glass composition and glass substrate

Details Glass composition and glass substrate Glass composition and glass substrate

2003-06-13

2008-07-08

Lorengo, Jerry A. (Department: 1793)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S067000, C501S064000, C501S065000, C501S068000, C501S069000, C428S688000

Reexamination Certificate

active

07396788

ABSTRACT:
A glass substrate for use as the substrate of an information recording medium such as a magnetic disk, magneto-optical disk, DVD, or MD or of an optical communication device, and a glass composition for making such a glass substrate, contains the following glass ingredients: 45 to 75% by weight of SiO2; 1 to 20% by weight of Al2O3; 0 to 15% by weight, zero inclusive, of B2O3; SiO2+Al2O3+B2O3accounting for 65 to 90% by weight; a total of 7 to 20% by weight of R2O compounds, where R=Li, Na, and K; and a total of 0 to 12% by weight, zero inclusive, of R′O compounds, where R′=Mg, Ca, Sr, Ba, and Zn. Moreover, the following conditions are fulfilled: B2O3=0% by weight, or Al2O3/B2O3≧1.0; and (SiO2+Al2O3+B2O3)/(the total of R2O compounds+the total of R2O compounds)≧3.

REFERENCES:
patent: 5219801 (1993-06-01), Shorrock et al.
patent: 5277946 (1994-01-01), Nagai et al.
patent: 5858897 (1999-01-01), Maeda et al.
patent: 5908794 (1999-06-01), Maeda et al.
patent: 6121175 (2000-09-01), Drescher et al.
patent: 6268304 (2001-07-01), Maeda et al.
patent: 6297182 (2001-10-01), Maeda et al.
patent: 6303528 (2001-10-01), Speit et al.
patent: 6313052 (2001-11-01), Nakashima et al.
patent: 6376403 (2002-04-01), Koyama et al.
patent: 6387510 (2002-05-01), Nakashima et al.
patent: 6413892 (2002-07-01), Koyama et al.
patent: 6713418 (2004-03-01), Kishimoto et al.
patent: 6753279 (2004-06-01), Kohli
patent: 6818576 (2004-11-01), Ikenishi et al.
patent: 6908870 (2005-06-01), Kawai
patent: 2003/0134734 (2003-07-01), Nishimoto et al.
patent: 2003/0220183 (2003-11-01), Kurachi et al.
patent: 2004/0194508 (2004-10-01), Nishimoto et al.
patent: 2004/0242398 (2004-12-01), Mori et al.
patent: 2005/0096210 (2005-05-01), Kawai
patent: 2005/0215414 (2005-09-01), Kawai
patent: 10-1329 (1998-01-01), None
patent: 11-11974 (1999-01-01), None
patent: 11-199267 (1999-07-01), None
patent: 11335133 (1999-12-01), None
patent: 2000-322731 (2000-11-01), None
patent: 2001-019466 (2001-01-01), None
patent: 2001-26460 (2001-01-01), None
patent: 2001-172043 (2001-06-01), None
patent: 2001-226137 (2001-08-01), None
patent: 2001-261365 (2001-09-01), None
patent: 2001-294441 (2001-10-01), None
patent: 2002-3241 (2002-01-01), None
patent: 2002-025040 (2002-01-01), None
patent: 2002-167230 (2002-06-01), None
patent: 2002167230 (2002-06-01), None
patent: 2002-255585 (2002-09-01), None
patent: 2002-348141 (2002-12-01), None
patent: 2004-43295 (2004-02-01), None
Machine Translation of JP 2002-25585.
Machine Translation of JP 2001-019466.
Machine Translation of JP 11-335133.
English Language Machine Translation of Japanese Patent Application Publication JP 2002-25040 A.
Japanese Office Action, dated Aug. 1, 2006, for counterpart Japanese Patent Application No. 2003-071789.
Japanese Offering of Information, dated Oct. 27, 2004, for counterpart Japanese Patent Application No. 2003-071789.
Japanese Offering of Information, dated Aug. 2, 2006, for counterpart Japanese Patent Application No. 2003-071789.
English Translation of Japanese Office Action, dated Aug. 1, 2006, for counterpart Japanese Patent Application No. 2003-071789.
English Translation of Japanese Offering of Information, dated Oct. 27, 2004, for counterpart Japanese Patent Application No. 2003-071789.
English Translation of Japanese Offering of Information, dated Aug. 2, 2006, for counterpart Japanese Patent Application No. 2003-071789.
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