Title:
PIEZOELECTRIC RESONANT COMPONENT
Document Type and Number:
WIPO Patent Application WO/2005/020435
Kind Code:
A1
Abstract:
A piezoelectric resonant component utilizing a basic wave and having good characteristics in which a spurious resonance due to a high order mode is suppressed. The piezoelectric resonant component (1) comprises a plurality of resonance electrodes, i.e. first and second split electrodes (3, 4) and a resonance electrode (5), provided on a piezoelectric board (2) made of a piezoelectric material having a Poisson’s ratio exceeding 1/3, and utilizes a basic wave, wherein the polarizing direction of the piezoelectric board is different between an oscillatory region which is displaced when the basic wave is excited and at least a part of a region on the outer side of the oscillatory region.
Inventors:
MITANI AKIHIRO (JP)
KANAI SHUNGO (JP)
GAMO MASAO (JP)
KANAI SHUNGO (JP)
GAMO MASAO (JP)
Application Number:
PCT/JP2004/008434
Publication Date:
March 03, 2005
Filing Date:
June 16, 2004
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
MITANI AKIHIRO (JP)
KANAI SHUNGO (JP)
GAMO MASAO (JP)
MITANI AKIHIRO (JP)
KANAI SHUNGO (JP)
GAMO MASAO (JP)
International Classes:
H03H9/10; H03H9/17; H03H9/56; H03H3/02; (IPC1-7): H03H9/17; H03H9/56
Foreign References:
| US5444326A | 1995-08-22 | |||
| JPH0795004A | 1995-04-07 | |||
| JPH10284985A | 1998-10-23 |
Attorney, Agent or Firm:
Miyazaki, Chikara (5-4 Tanimachi 1-chome, Chuo-k, Osaka-shi Osaka, JP)
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