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:
Aug. 30, 2005
Filed:
Feb. 28, 2003
Michio Ohsawa, Kanagawa, JP;
Akihiro Otsuki, Nagano, JP;
Michio Ohsawa, Kanagawa, JP;
Akihiro Otsuki, Nagano, JP;
Fuji Electric Co., Ltd., , JP;
Abstract
A magnetic recording medium can be produced without substrate heating during sputtering. The recording medium has a substrate, an underlayer of a nonmagnetic film with a bcc structure formed on the substrate, an intermediated layer of a nonmagnetic film with an hcp structure formed on the underlayer, a magnetic layer of a magnetic film with an hcp structure formed on the intermediate layer, and a protective layer formed on the magnetic layer. Materials used for the underlayer, the intermediate layer, and the magnetic layer has spacings between principal lattice planes of the respective crystals that can be expresses as d(between (110) planes in the underlayer)>d(between (002) planes in the intermediate layer)>d(between (002) planes in the magnetic layer).