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:
Mar. 04, 1997
Filed:
Feb. 25, 1994
Mineharu Tsukada, Kawasaki, JP;
Koji Omote, Kawasaki, JP;
Fujitsu, Ltd., , JP;
Abstract
A method of manufacturing a laminated piezoelectric actuator including at least an actuator element which has a plurality of piezoelectric ceramics layers and internal electrode layers laminated alternately and external electrodes which connect alternate internal electrode layers in two groups. The method places a conductor layer on a piezoelectric ceramic green sheet for use as internal electrodes; bores a plurality of slits through the conductor layer-placed green sheet such that the slits are arranged in a line along the X axis of an orthogonal X-Y coordinates given arbitrarily in a plane of the green sheet with the lengthwise side perpendicular to the X axis, at an interval of a predetermined length and the slits in adjacent two lines are staggered by half the predetermined length; bores at least two positioning holes in the conductor layer-placed green sheet, symmetrically with respect to an intersection of a straight line crossing a center of a particular slit along the Y axis and another straight line passing a middle of adjacent two particular lines along the X axis; superposes a plurality of the positioning hole-bored green sheets with alternate green sheets rotated 180 degrees in the plane, based on the positioning holes; produces a parent actuator having the piezoelectric ceramics layers and internal electrode layers laminated alternately, from the thus-superposed green sheets; cuts the ceramics perpendicularly to produce the actuator element