Title: Piezoelectric actuator, inspection method, and liquid eject apparatus
Application Number: 200610163137 Application Date: 2006.11.30
Publication Number: 1976197 Publication Date: 2007.06.06
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H02N2/00;H01L41/08
Applicant(s) Name: Brother Ind Ltd. Address:
Inventor(s) Name: Watanabe Hidetoshi;Kubo Toshihumi
Attorney & Agent: chewen daiyi ning
Abstract:
    A piezoelectric actuator includes a piezoelectric vibrating plate including piezoelectric ceramics, an internal electrode formed on a first surface of the piezoelectric vibrating plate, a piezoelectric layer formed on the internal electrode, and a plurality of surface electrodes that are provided on a surface of the piezoelectric layer. When the internal electrode is grounded and a predetermined voltage is applied to a liquid contacting with a second surface of the piezoelectric vibrating plate, a value of a current flowing between the liquid and the internal electrode is not more than 0.01 mu A.
Time: 14
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