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:
Jul. 06, 2004
Filed:
Jul. 03, 2002
Shoji Tanaka, Kanagawa, JP;
Kazuya Suzuki, Kanagawa, JP;
Takeshi Sasa, Miyagi, JP;
Takehisa Ishida, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A magnetic disk with an embossed pattern is provided. The disk comprises a magnetic film formed on a substrate provided with an erose embossed pattern on a surface along a circumferential direction, said embossed pattern having an upper surface, a lower surface, and a inclined portion or a vertical portion between the upper surface and the lower surface. In the disk, at least the magnetic film in the inclined portion or the vertical portion of the embossed pattern is magnetized, the direction of said magnetization in the magnetic film in the inclined portion or the vertical portion in cross section in the circumferential direction of the magnetic disk is substantially parallel with a film surface of the magnetic film, and said magnetic film in the inclined portion or the vertical portion has a magnetization reversal area.