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:
Jun. 15, 2004
Filed:
Jan. 23, 2003
Fumiyoshi Kirino, Tokyo, JP;
Nobuyuki Inaba, Hasuda, JP;
Hiroki Yamamoto, Hitachi, JP;
Takashi Naitou, Hitachiota, JP;
Ken Takahashi, Tokai, JP;
Eiji Koyama, Tsuchiura, JP;
Motoyasu Terao, Hinode, JP;
Sumio Hosaka, Hinode, JP;
Hiroki Kuramoto, Yokohama, JP;
Other;
Abstract
An ultra-high density information recording media has an inorganic compound layer on a substrate , and in the inorganic compound layer , an oxide of at least one kind selected from silicon oxide, aluminum oxide, titanium oxide, tantalum oxide, and zinc oxide exists in an amorphous state at a grain boundary of crystal grain of an oxide of at least one kind selected from cobalt oxide, iron oxide, and nickel oxide. The media has a magnetic layer made of an artificial lattice multilayer obtained by alternately laminating a Co layer or an alloy layer consisting of Co as a main phase and a metal element layer of at least one kind selected from Pt and Pd onto the layer . Thus, a distribution of magnetic properties serving as a pinning site of the movement of a magnetic wall in case of recording information to the magnetic layer is formed in the magnetic layer