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:
Feb. 04, 1997
Filed:
Oct. 18, 1991
John G Eckhardt, Morgan Hill, CA (US);
Michael M Farrow, Saratoga, CA (US);
Chien-Jung F Lin, San Jose, CA (US);
James C Suits, Los Gatos, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An optical data storage medium is comprised of a data layer and a reference layer deposited onto a substrate. The data layer material is comprised of a transition metal rich rare earth-transition metal. The data layer has a destruction temperature greater than its Curie temperature. The reference layer is comprised of a transition metal poor rare earth-transition metal. The reference layer material has a Curie temperature greater than the destruction temperature of the data layer material. The result is a magneto-optic medium which may be recorded upon only once.