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:
May. 28, 2002
Filed:
Sep. 29, 1999
Toshio Ando, Kamakura, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A perpendicular magnetic recording medium having an excellent thermal stability of the recorded signal and S/N and a low medium noise, and capable of easily forming a perpendicular magnetic recording layer is provided. The perpendicular magnetic recording medium has, at least, a perpendicular magnetic recording layer having a hexagonal closest packing (hcp) structure of which c-axis is perpendicular to a surface of the perpendicular magnetic recording layer, on a non-magnetic base, wherein the perpendicular magnetic recording layer has a saturation magnetization Ms of not more than 400 emu/cc, and a lattice constant c of the hexagonal closest packing structure is not more than 4.07 Å.