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. 27, 2013
Filed:
Nov. 12, 2009
Takashi Takenaga, Tokyo, JP;
Takeharu Kuroiwa, Tokyo, JP;
Hiroshi Takada, Tokyo, JP;
Ryoji Matsuda, Tokyo, JP;
Yosuke Takeuchi, Tokyo, JP;
Takashi Takenaga, Tokyo, JP;
Takeharu Kuroiwa, Tokyo, JP;
Hiroshi Takada, Tokyo, JP;
Ryoji Matsuda, Tokyo, JP;
Yosuke Takeuchi, Tokyo, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
A magnetic storage device stable in write characteristic is provided. A first nonmagnetic film is provided over a recording layer. A first ferromagnetic film is provided over the first nonmagnetic film and has a first magnetization and a first film thickness. A second nonmagnetic film is provided over the first ferromagnetic film. A second ferromagnetic film is provided over the second nonmagnetic film, is coupled in antiparallel with the first ferromagnetic film, and has a second magnetization and a second film thickness. An antiferromagnetic film is provided over the second ferromagnetic film. The sum of the product of the first magnetization and the first film thickness and the product of the second magnetization and the second film thickness is smaller than the product of the magnetization of the recording layer and the film thickness of the recording layer.