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:
Apr. 22, 1997
Filed:
Jan. 24, 1996
Koji Matsumoto, Kawasaki, JP;
Keiji Shono, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A method for reproducing information recorded on a magneto-optical recording medium that includes a transparent substrate, a first magnetic layer laminated on the transparent substrate, a second magnetic layer laminated on the first magnetic layer, and a third magnetic layer laminated on the second magnetic layer. The first magnetic layer has an easy axis of magnetization in a plane at room temperature. The second and third magnetic layers have an easy axis of magnetization perpendicular to the substrate. When a laser beam is directed onto the medium a temperature distribution is formed in the laser beam spot. The temperature distribution includes a first area where the direction of magnetization of the first magnetic layer in an in-plane direction, a second area where the magnetization of the third magnetic layer is transferred to the second and the first magnetic layers by exchange bond, and a third area where the temperature of the second magnetic layer is higher than its Curie temperature.