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:
Sep. 28, 1993
Filed:
May. 21, 1992
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G01D / ;
U.S. Cl.
CPC ...
346-11 ; 346 / ; 3461351 ; 3692753 ; 430945 ;
Abstract
An optical recording medium for optical data recording and reproduction is produced through a process including the steps of forming an optical recording layer comprising an organic film on a substrate and irradiating the organic film with laser light to scatter the irradiated portion of the organic film, thus forming a tracking groove thereat and leaving an optical recording part along the tracking groove. The thus formed optical recording part and tracking groove provide a high reflectivity ratio or a high reflective contrast, whereby a good tracking fidelity is ensured during the optical recording and reproduction.