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:
Oct. 15, 2013
Filed:
Jun. 15, 2011
Daisuke Masuda, Tokyo, JP;
Chiyo Saito, Tokyo, JP;
Junichi Horikawa, Tokyo, JP;
Iwao Okamoto, Singapore, SG;
Daisuke Masuda, Tokyo, JP;
Chiyo Saito, Tokyo, JP;
Junichi Horikawa, Tokyo, JP;
Iwao Okamoto, Singapore, SG;
WD Media (Singapore) Pte. Ltd., Singapore, SG;
Abstract
[Problem] A perpendicular magnetic recording medium and a magnetic disk device that are suitable for a shingle recording type are provided. [Solution] The perpendicular magnetic recording medium of the present invention is a perpendicular magnetic recording medium for a shingle recording type having a laminated film including a soft magnetic layerand a main recording layerformed on base, the soft magnetic layerhaving a thickness found from a core width of a magnetic head for recording and reproduction with respect to the perpendicular magnetic recording medium and a track pitch narrower than the core width.