发明名称 |
Piezoelectric vibrator |
摘要 |
An energy-trapping strip piezoelectric vibrator utilizing a third harmonic overtone of a thickness shear mode is provided. A piezoelectric vibrator 1 has a strip piezoelectric ceramic substrate 2 polarized in a longitudinal direction, and first and second excitation electrodes 3 and 4 provided on first and second principal surfaces 2a and 2b of the piezoelectric ceramic substrate 2. An excitation region 5 including a piezoelectric vibration portion that includes a portion where the first and second excitation electrodes 3 and 4 overlap and that utilizes harmonics of the thickness shear mode is formed. A region around the piezoelectric vibration portion is set as a non-excitation region. At least a region of the non-excitation region neighboring the piezoelectric vibration portion is a region having the same polarization axis direction as the excitation region 5 and a relatively small polarization degree or is an unpolarized region. |
申请公布号 |
GB2447192(B) |
申请公布日期 |
2011.02.02 |
申请号 |
GB20080012223 |
申请日期 |
2007.01.26 |
申请人 |
MURATA MANUFACTURING CO., LTD |
发明人 |
HIROAKI KAIDA;HITOSHI SAKAGUCHI;SHUNGO KANAI |
分类号 |
H03H9/02;H01L41/09;H01L41/187;H01L41/22;H01L41/257;H03H3/02;H03H9/13;H03H9/17 |
主分类号 |
H03H9/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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