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:
Mar. 04, 2008
Filed:
Mar. 22, 2007
Naoki Honda, Akita, JP;
Kazuhiro Ouchi, Minamiakita-gun, JP;
Naoki Honda, Akita, JP;
Kazuhiro Ouchi, Minamiakita-gun, JP;
Japan Science and Technology Agency, Kawaguchi-shi, JP;
Akita Prefecture, Akita-shi, JP;
Abstract
A method of designing a patterned magnetic recording medium including a magnetic film with perpendicular magnetic anisotropy which is patterned into dots form includes steps of setting values to dot pattern periods Pand P, a thickness 't', a thermal stability factor K, a minimum inter-dot spacing S, and a maximum recording field H, setting an initial value of a saturation magnetization M, finding a nucleation field for magnetization reversal Hand estimating a coercivity Hand a saturation field H, and repeating the steps given above so as to make the saturation field Hlower than the maximum recording field H, thereby determining the magnetic properties M, Hand Hsatisfying a desired condition.