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. 21, 2003
Filed:
Jan. 25, 2001
Haruhiko Kikkawa, Yokohama, JP;
Yasuo Amano, Yokohama, JP;
Shigeo Nakamura, Odawara, JP;
Osamu Narisawa, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An actuator of a magnetic disk has a laminated construction of piezoelectric flat sheet in which there are two polarized regions separated by a non-polarized region and the polarization direction and the direction of applied magnetic fields are the same as the thickness direction of the piezoelectric flat sheet. The actuator is fixed in such a manner as to bridge the top surfaces of the suspension and suspension-supporting member of the magnetic disk, and is coated with a resin material. The actuator enables vertical vibrations and dust generation which occur in association with the movement of the supporting member to be reduced and the accuracy of head positioning to be improved.