Title:
PIEZOELECTRIC OSCILLATOR
Document Type and Number:
WIPO Patent Application WO/2007/091376
Kind Code:
A1
Abstract:
An energy confinement strip type piezoelectric oscillator utilizing a triple
wave of thickness slip mode. The piezoelectric oscillator (1) comprises a strip
type piezoelectric ceramic substrate (2) polarized in the longitudinal direction,
and first and second excitation electrodes (3, 4) provided on the first and second
major surfaces (2a, 2b) of the piezoelectric ceramic substrate (2). An exciting
region (5) including a piezoelectric oscillating portion utilizing a harmonic
of thickness slip mode is formed while including the overlapping portion of the
first and second excitation electrodes (3, 4). Periphery of the piezoelectric
oscillating portion is a nonexciting region and at least a portion of the nonexciting
region contiguous to the piezoelectric oscillating portion is a region of relatively
small degree of polarization or a non-polarized region, having a polarization
axis direction identical to that of the exciting region (5).
Inventors:
KAIDA HIROAKI (JP)
SAKAGUCHI HITOSHI (JP)
KANAI SHUNGO (JP)
SAKAGUCHI HITOSHI (JP)
KANAI SHUNGO (JP)
Application Number:
PCT/JP2006/325395
Publication Date:
August 16, 2007
Filing Date:
December 20, 2006
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
KAIDA HIROAKI (JP)
SAKAGUCHI HITOSHI (JP)
KANAI SHUNGO (JP)
KAIDA HIROAKI (JP)
SAKAGUCHI HITOSHI (JP)
KANAI SHUNGO (JP)
International Classes:
H03H9/17; H01L41/09; H01L41/187; H01L41/22; H01L41/257; H03H3/02
Foreign References:
| JP2003249836A | 2003-09-05 | |||
| JPS57202112A | 1982-12-10 | |||
| JP2005244184A | 2005-09-08 | |||
| JPH01114209A | 1989-05-02 | |||
| JPH09139651A | 1997-05-27 |
Attorney, Agent or Firm:
MIYAZAKI, Chikara (5-4 Tanimachi 1-chome, Chuo-ku, Osaka-sh, Osaka 12, JP)
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