Invention Grant
- Patent Title: Multilayer piezoelectric element and vibration-wave drive device
- Patent Title (中): 多层压电元件和振动波驱动装置
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Application No.: US10985374Application Date: 2004-11-10
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Publication No.: US07233096B2Publication Date: 2007-06-19
- Inventor: Yutaka Maruyama , Nobuyuki Kojima
- Applicant: Yutaka Maruyama , Nobuyuki Kojima
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A. Inc. I.P. Div
- Priority: JP2003-383896 20031113; JP2004-299072 20041013
- Main IPC: H01L41/08
- IPC: H01L41/08

Abstract:
A vibration-wave drive motor incorporating a multilayer piezoelectric element having reduced vibration damping as well as a design lending itself to reduced manufacturing costs and miniaturization. The multilayer piezoelectric element includes a piezoelectric active part formed by a plurality of piezoelectric layers having an internal electrode, and a piezoelectric inactive part formed by an integrated piezoelectric layer with no internal electrodes. The vibration-wave drive motor consists of a vibration body including the multilayer piezoelectric element, and a contact body press contacting the vibration body.
Public/Granted literature
- US20050104476A1 Multilayer piezoelectric element and vibration-wave drive device Public/Granted day:2005-05-19
Information query
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