Metal working – Piezoelectric device making
Reexamination Certificate
2006-01-24
2006-01-24
Kim, Paul D (Department: 3729)
Metal working
Piezoelectric device making
C029S594000, C029S597000, C029S602100, C029S609100, C310S31300R, C310S31300R, C310S358000, C333S187000, C333S188000, C333S189000, C333S190000, C333S191000, C427S100000, C427S226000, C427S229000
Reexamination Certificate
active
06988300
ABSTRACT:
A piezoelectric element contains a piezoelectric ceramic body having a layered perovskite structure, and has the C axis selected and oriented in the thickness direction. In the piezoelectric ceramic body, line shaped electrodes are formed perpendicular to the C axis selected and oriented. The electrodes exposed at both of the end faces of the piezoelectric ceramic body are covered with conductive materials and insulation materials. The piezoelectric ceramic body is polarized in the opposite directions on both of the sides of electrodes arranged in the width direction. Moreover, external electrodes are formed on the faces where the conductive materials and the insulation materials are formed, whereby two groups of the electrodes are arranged in an interdigital electrode form.
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Ando Akira
Hayashi Koichi
Kimura Masahiko
Dickstein Shapiro Morin & Oshinsky LLP.
Kim Paul D
Murata Manufacturing Co. Ltd.
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