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:
Jul. 05, 2005
Filed:
Jul. 08, 2002
Yasushi Sakai, Nagano, JP;
Hiroyuki Uwazumi, Nagano, JP;
Kazuo Enomoto, Nagano, JP;
Sadayuki Watanabe, Nagano, JP;
Yasushi Sakai, Nagano, JP;
Hiroyuki Uwazumi, Nagano, JP;
Kazuo Enomoto, Nagano, JP;
Sadayuki Watanabe, Nagano, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
A perpendicular magnetic recording medium and method thereof, includes a nonmagnetic substrate; a soft magnetic under layer; an intermediate layer; a bilayer magnetic recording layer; a protective layer; and a liquid lubricant layer. According to a following order, the soft magnetic under layer, the intermediate layer, the bilayer magnetic recording layer, the protective layer, and the liquid lubricant layer are sequentially stacked on the nonmagnetic substrate. The bilayer magnetic recording layer includes a first magnetic layer including a CoCr alloy crystalline film, and a second magnetic layer including a rare earth-transition metal alloy noncrystalline film.