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. 04, 2009
Filed:
Jun. 19, 2006
Yuji Fujita, Kanagawa, JP;
Yasuo Amano, Kanagawa, JP;
Yoshihide Yamaguchi, Kanagawa, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A disk device has a small size, a small thickness, a high efficiency, a small degree of vibration and a small level of noise. In one embodiment, the disk device comprises a disk for storing information and a disk drive for driving the disk. The disk drive includes a rotor portion mounting an annular permanent magnet on the outer peripheral portion thereof, and a stator portion disposed on the outer side in the radial direction of the annular permanent magnet. The stator portion is constituted by a wiring board provided with a stator core formed by laminating magnetic metal plates in a radial manner and a coil that is so formed as to surround the stator core while electrically connecting wiring layers and through hole portions. The coil is so formed that among the envelopes connecting the outermost peripheral surfaces of the coil in the radial direction, the neighboring envelops and intersect at an inner position in the radial direction.