Laminated piezoelectric element and vibration wave actuator

Details Laminated piezoelectric element and vibration wave actuator Laminated piezoelectric element and vibration wave actuator

1996-01-24

1998-06-23

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310323, 310328, H01L 4108

Patent

active

057709165

ABSTRACT:
A laminated piezoelectric element has a surface electrode formed on a surface of the element and having an area falling within the range from 0.002 mm.sup.2 to 0.2 mm.sup.2, and a first region excluding the surface electrode on the surface on which the surface electrode is formed, and having a level difference (surface roughness) which is less than or equal to 20 .mu.m.

REFERENCES:
patent: 4469978 (1984-09-01), Hamada et al.
patent: 4759107 (1988-07-01), Ogawa et al.
patent: 4870313 (1989-09-01), Hirama et al.
patent: 5073740 (1991-12-01), Jomura et al.
patent: 5271133 (1993-12-01), Dam et al.
patent: 5356500 (1994-10-01), Scheinbeim
European Patent Office Communication (May 15, 1996).

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