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:
Mar. 25, 2003
Filed:
Jul. 07, 2000
Yuichi Sabi, Tokyo, JP;
Kimitaka Kawase, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A magneto-optical recording medium, which is for recording and reproduction of information by focusing of light of a wavelength/numerical aperture of about 1000 nm or less, has a light transmitting first dielectric layer having a first surface to which light strikes. A magneto-optical recording layer is formed on a back surface of the first surface of the first dielectric layer. A light transmitting metal layer is formed on the magneto-optical recording layer to a predetermined thickness required for dispersion of heat (about 10 nm or more) from the magneto-optical recording layer and having a larger heat conductivity than the magneto-optical recording layer. A light transmitting second dielectric layer is formed on the light transmitting metal layer. A metal reflective layer is formed on the second dielectric layer and reflects the light.