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:
Jun. 25, 2013
Filed:
Mar. 09, 2012
Kikuo Kusukawa, Yoshikawa, JP;
Masato Shiimoto, Odawara, JP;
Kazuhiko Hosomi, Fujisawa, JP;
Katsuro Watanabe, Hitachi-ohta, JP;
Kikuo Kusukawa, Yoshikawa, JP;
Masato Shiimoto, Odawara, JP;
Kazuhiko Hosomi, Fujisawa, JP;
Katsuro Watanabe, Hitachi-ohta, JP;
HGST Netherlands B.V., Amsterdam, NL;
Abstract
According to one embodiment, a high-frequency magnetic field-assisted magnetic recording head includes a main pole adapted for producing a writing magnetic field, a STO positioned above the main pole, a low-resistance layer positioned above the STO, and a current confinement layer positioned between the low-resistance layer and the main pole, wherein the main pole and the low-resistance layer are adapted for acting as poles for writing data to a magnetic medium in response to a flow of current to the STO positioned therebetween to generate a high-frequency magnetic field which overlaps with the writing magnetic field, and wherein the current confinement layer is adapted for controlling a current density and/or a current density distribution of the current flowing to the STO. Other magnetic recording heads and methods of production thereof are also described according to more embodiments.