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:
Feb. 10, 2004
Filed:
Feb. 28, 2001
Tetsuo Nakazawa, Nishiibaraki, JP;
Yuzo Kozono, Hitachioota, JP;
Takashi Naito, Mito, JP;
Tatsumi Hirano, Hitachinaka, JP;
Hiroki Yamamoto, Hitachi, JP;
Takashi Namekawa, Hitachi, JP;
Yasutaka Suzuki, Taga, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic recording medium comprising a substrate , an inorganic compound layer which works as a shielding layer, a magnetic layer and a protective layer which are laminated on said substrate; wherein said inorganic compound layer comprises column-like crystal particles and amorphous grain boundary phases isolating said particles , wherein said magnetic layer has magnetic particles arranged regularly and epitaxially grows on said inorganic compound layer , and wherein the grain sizes and the standard grain size deviation of magnetic particles of said magnetic layer reflect those of said inorganic compound layer