Piezoelectric element and method of manufacturing the same

Details Piezoelectric element and method of manufacturing the same Piezoelectric element and method of manufacturing the same

1995-06-02

1999-06-22

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310359, 310366, H01L 4108

Patent

active

059145560

ABSTRACT:
A piezoelectric element includes an internal electrode embedded in a piezoelectric ceramic body so as to extend in a longitudinal direction of the body. First to third surface electrodes are formed on upper and lower surfaces of the piezoelectric ceramic body in respective first to third portions along the longitudinal direction. Connecting electrodes are formed to connect the first to third surface electrodes with each other. The first to third portions are polarized so that the second portion is polarized opposite to the polarization of the first and third portions, and regions located above and below the internal electrode are polarized in opposite directions in the respective ones of the first to third portions.

REFERENCES:
patent: 3816774 (1974-06-01), Ohnuki et al.
patent: 4564782 (1986-01-01), Ogawa
patent: 5248912 (1993-09-01), Zdeblick et al.
patent: 5402159 (1995-03-01), Takahashi et al.
patent: 5473930 (1995-12-01), Gademann et al.
patent: 5490422 (1996-02-01), Tabota et al.
patent: 5515725 (1996-05-01), Tabota et al.

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