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:
Oct. 12, 2004
Filed:
Jun. 11, 2002
Hideyuki Akimoto, Kawasaki, JP;
Kenji Sato, Kawasaki, JP;
Yuki Yoshida, Kawasaki, JP;
Masaya Suzuki, Kawasaki, JP;
Akira Kikuchi, Higashine, JP;
Tohru Horie, Higashine, JP;
Naoya Saito, Higashine, JP;
Akiko Honda, Higashine, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A magnetic recording medium for high areal recording density that has excellent thermal fluctuation resistance and recording/reproduction characteristics, and a method of producing the same. The magnetic recording medium includes a glass substrate, an NiP layer having an oxide film on its surface provided on the glass substrate, a ground layer provided on the NiP layer, and a nonmagnetic intermediate layer provided on the ground layer. The magnetic recording medium further includes an exchange layer structure composed of a ferromagnetic layer and a nonmagnetic coupling layer provided on the nonmagnetic intermediate layer, and a magnetic recording layer provided on the exchange layer structure. The oxide film on the NiP layer is formed by introducing a small quantity of oxygen into a vacuum chamber of a sputter device. The formation and oxidation of the NiP layer are conducted at a temperature of not less than 140° C.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile