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. 17, 2001
Filed:
May. 07, 1999
Applicant:
Inventors:
Yoji Arita, Yokohama, JP;
Yuzo Seo, Yokohama, JP;
Ryuichi Yoshiyama, Yokohama, JP;
Junichi Kozu, Yokohama, JP;
Toshihiko Kuriyama, Yokohama, JP;
Mitsunori Mochida, Yokohama, JP;
Assignee:
Mitsubishi Chemical Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/60 ;
U.S. Cl.
CPC ...
G11B 5/60 ;
Abstract
The disclosure describes a magnetic recording medium having at least a magnetic layer, optionally by means of an under layer, on a non-magnetic substrate, wherein projections formed by irradiation of an energy beam and each having a height from 1 to 60 nm are provided at the number of 10,to 10,per 1 mm,on the surface of any one of the non-magnetic substrate, the under layer, the magnetic layer and the magnetic recording medium.