Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2008-02-14
2009-11-24
SanMartin, J. (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C252S06290R, C501S134000
Reexamination Certificate
active
07622852
ABSTRACT:
The invention provides a piezoelectric film having a large piezoelectric property, and a piezoelectric element, a liquid discharge head and a liquid discharge apparatus utilizing the same. The piezoelectric film is formed by an epitaxial oxide of <100> orientation having at least a tetragonal crystal structure, in which the oxide is a perovskite type composite oxide represented by a general formula ABO3and contains at least domains C, D and E of [100] orientation having mutual deviation in crystal direction, where the angular deviation between [100] directions in domains C and D, in domains D and E, in domains C and E and in domains D and E are respectively 5° or less, 5° or less, 0.3° or less, and 0.3° or more, and the angular deviation between [001] directions in domains C and E and in domains D and E are respectively 1.0° or more, and 1.0° or more.
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Fukui Tetsuro
Funakubo Hiroshi
Ifuku Toshihiro
Ikariyama Rikyu
Nakaki Hiroshi
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
SanMartin J.
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