Crystalized glass for information recording medium,...

Details Crystalized glass for information recording medium,... Crystalized glass for information recording medium,...

2005-11-01

2005-11-01

Resan, Stevan A. (Department: 1773)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S690000, C501S004000, C501S010000

Reexamination Certificate

active

06960399

ABSTRACT:
Enclosed are crystallized glasses suitable for a substrate for an information recording medium such as a magnetic disc, optical disc, or optomagnetic disc, a substrate for information recording medium using such a crystallized glass substrate, and an information recording medium using such a substrate for information recording medium. The crystallized glasses are capable of providing a glass substrate having a high Young's modulus, as well as excellent mechanical strength, surface flatness, and heat resistance and having an excellent surface smoothness upon polishing. Glass substrate having an excellent surface smoothness using such a crystallized glass are also disclosed.

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