Stacked piezoelectric element and vibration wave driving...

Details Stacked piezoelectric element and vibration wave driving... Stacked piezoelectric element and vibration wave driving...

2007-04-03

2010-10-05

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S363000, C310S365000, C310S366000

Reexamination Certificate

active

07808162

ABSTRACT:
A stacked piezoelectric element comprising a driving unit and a non-driving unit, and a vibration wave driving apparatus, which are capable of suppressing occurrences of deformation, particularly warping, that are generated during firing and polarization of the stacked piezoelectric element. A driving unit has a first conductive layer and a first piezoelectric layer consisting of a piezoelectric material, which is driven by an application of voltage to the first conductive layer to generate vibration on the stacked piezoelectric element. A non-driving unit has a plurality of second conductive layers and a plurality of second piezoelectric layers consisting of the piezoelectric material, which is arranged to have a thickness that enables generation of the vibration.

REFERENCES:
patent: 6281591 (2001-08-01), Nakamura
patent: 6351393 (2002-02-01), Kresge et al.
patent: 6575565 (2003-06-01), Isono et al.
patent: 6747396 (2004-06-01), Blom
patent: 7233096 (2007-06-01), Maruyama et al.
patent: 2005/0104476 (2005-05-01), Maruyama et al.
patent: 2004-349688 (2004-12-01), None
patent: 2005-168281 (2005-06-01), None

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