The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 1991
Filed:
Mar. 31, 1989
Applicant:
Inventor:
Hideki Ohkawa, Tokyo, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428408 ; 428689 ; 20419226 ; 369288 ;
Abstract
According to the present invention, an information storage medium is disclosed comprising a substrate, and a recording film, formed on the substrate, comprising tellurium or tellurium alloy, carbon, and hydrogen, the recording film absorbing far-infrared rays in a wavelength rnge of 25 to 100 .mu.m by a chemical bonding of tellurium and carbon having a carbon-hydrogen bond. The information storage medium of the present invention has excellent oxidation resistance and its oxidation resistance can be quickly determined. A method is also disclosed for quickly determining the oxidation resistance of a tellurium film when the method used to manufacture the film is unknown.