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:
Dec. 24, 1991
Filed:
Mar. 23, 1990
Yoshihisa Usami, Shizuoka, JP;
Yoshio Inagaki, Kanagawa, JP;
Masao Yabe, Shizuoka, JP;
Mitsuru Sawano, Shizuoka, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A method of optically recording information on an information recording medium comprising a disc-shaped substrate having a pregroove comprising a groove having a depth of 800 to 2,000 angstroms and a half width of 0.2 to 0.7 .mu.m thereon, a recording layer comprising a dye for optically recording information by means of a laser beam which is provided on the substrate, and a reflecting layer of a metal which is provided on the recording layer is disclosed. The recording method is carried out by irradiating a bottom part of the pregroove having the recording layer thereon with a laser beam from the substrate side under rotation of the recording medium. Further, an information recorded medium which is recorded with information by the above method is also disclosed.