发明名称 |
Thickness extensional vibration mode piezoelectric resonator |
摘要 |
A thickness extensional piezoelectric resonator 1 comprises a rectangular piezoelectric strip 2, first and second excitation electrodes 3, 4 formed on both faces of the piezoelectric strip 2, and an internal electrode 6 disposed inside the piezoelectric strip. The first and second excitation electrodes 3 and 4 are located on opposite sides of the piezoelectric strip 2. The internal electrode 6 is located opposite to the first and second excitation electrodes 3, 4. Assuming that the piezoelectric plate 2 has a width W and a thickness t, the piezoelectric plate is so dimensioned that W/d is less than 6.1 if d = t/n. This thickness extensional piezoelectric resonator can be fabricated in smaller size. The resonator can effectively suppress unwanted spurious vibrations. |
申请公布号 |
EP0884840(A3) |
申请公布日期 |
2000.03.22 |
申请号 |
EP19980109649 |
申请日期 |
1998.05.27 |
申请人 |
MURATA MANUFACTURING CO., LTD. |
发明人 |
KAIDA, HIROAKI;YAMADA, MITSUHIRO;INOUE, JIRO |
分类号 |
H03H9/02;H03H9/13;H03H9/17;H03H9/205 |
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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