发明授权
US07768179B2 Quartz crystal unit, quartz crystal oscillator having quartz crystal unit and electronic apparatus having quartz crystal oscillator
有权
石英晶体单元，具有石英晶体单元的石英晶体振荡器和具有石英晶体振荡器的电子设备
- 专利标题： Quartz crystal unit, quartz crystal oscillator having quartz crystal unit and electronic apparatus having quartz crystal oscillator
- 专利标题（中）： 石英晶体单元，具有石英晶体单元的石英晶体振荡器和具有石英晶体振荡器的电子设备
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申请号： US12074828申请日： 2008-03-06
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公开(公告)号： US07768179B2公开(公告)日： 2010-08-03
- 发明人: Hirofumi Kawashima
- 申请人： Hirofumi Kawashima
- 申请人地址： JP
- 专利权人： Piedek Technical Laboratory
- 当前专利权人： Piedek Technical Laboratory
- 当前专利权人地址： JP
- 代理机构： Adams & Wilks
- 优先权： JP2003-205844 20030630; JP2003-436310 20031205
- 主分类号： H01L41/08
- IPC分类号： H01L41/08
摘要：
A quartz crystal unit comprising a case having an interior space and a mounting portion in the interior space, and a quartz crystal resonator having a base portion and first and second vibrational arms, the quartz crystal resonator being vibratable in a flexural mode, a capacitance ratio r1 of a fundamental mode of vibration of the quartz crystal resonator being less than a capacitance ratio r2 of a second overtone mode of vibration thereof, a mounting arm protruding from the base portion and extending in a common direction with at least one of the first and second vibrational arms, the mounting arm being mounted on the mounting portion of the case, an electrode being disposed on a surface of the mounting arm and a surface in the interior space of the case, the electrode disposed on the surface of the mounting arm being connected to the electrode disposed on the surface in the interior space of the case.
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