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. 28, 2005
Filed:
Jun. 03, 2004
Mikio Tokuyama, Tsukuba, JP;
Ryoichi Ichikawa, Ushiku, JP;
Shigeo Nakamura, Odawara, JP;
Toshihiko Shimizu, Yasato, JP;
Hiromitsu Masuda, Chiyoda, JP;
Hiromitsu Tokisue, Chiyoda, JP;
Mikio Tokuyama, Tsukuba, JP;
Ryoichi Ichikawa, Ushiku, JP;
Shigeo Nakamura, Odawara, JP;
Toshihiko Shimizu, Yasato, JP;
Hiromitsu Masuda, Chiyoda, JP;
Hiromitsu Tokisue, Chiyoda, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic disk device having a magnetic disk for recording information, a rotary mechanism for rotating the magnetic disk, a magnetic head unit for recording information on the rotating magnetic disk, a slider having mounted thereon the magnetic head unit and flying over the rotating magnetic disk, a magnetic head supporting mechanism for supporting the slider, and a positioning mechanism for setting the magnetic head unit at a predetermined radial position. The magnetic head supporting mechanism has mounted thereon an integrated circuit (IC) for amplifying an information write/read signal of the magnetic head unit, and a control circuit is connected to the IC. A recording frequency is controlled according to the radial position of the IC on the magnetic disk by the control circuit.