Substrate for information recording medium, information...

Details Substrate for information recording medium, information... Substrate for information recording medium, information...

2003-10-29

2009-10-13

Tarazano, D. Lawrence (Department: 1794)

Stock material or miscellaneous articles

Magnetic recording component or stock

Magnetic recording media substrate

C501S027000, C501S102000, C065S033400

Reexamination Certificate

active

07601446

ABSTRACT:
A substrate for an information recording medium, which has high heat resistance and high acid resistance and is formed of a glass having a glass transition temperature (Tg) of 600° C. or higher and having an etching rate of 0.1 μm/minute or less with regard to a hydrosilicofluoric acid aqueous solution that is maintained at a temperature of 45° C. and has a hydrosilicofluoric acid concentration of 1.72% by weight, and an information recording medium having an information recording layer formed on the above substrate.

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Translation JA 2001-294441.
Translation JA 10-158028.
JA 2002-201040—translation.
JA 2002-160943—translation.

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