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:
Feb. 04, 2003
Filed:
Jan. 19, 2001
Applicant:
Inventors:
Joichiro Ezaki, Tokyo, JP;
Takashi Honda, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 2/124 ; G11B 5/56 ;
U.S. Cl.
CPC ...
G11B 2/124 ; G11B 5/56 ;
Abstract
An actuator for precisely positioning an object to be positioned is fixed between the object and a support member. The actuator has a displacement generation part which includes a solid piezoelectric material member, a common electrode formed on one surface of the piezoelectric material member to cover substantially whole of the one surface, and first and second electrodes formed on the other surface opposite to the one surface, of the piezoelectric material member to superimpose to the common electrode. The first and second electrodes have side edges facing with each other via a uniform width space, respectively.