发明授权
- 专利标题： Surface acoustic wave device, surface acoustic wave apparatus, and communications equipment
- 专利标题（中）： 表面声波装置，表面声波装置和通信设备
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申请号： US11212504申请日： 2005-08-26
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公开(公告)号： US07307369B2公开(公告)日： 2007-12-11
- 发明人: Yuuko Yokota , Motoki Ito , Shigehiko Nagamine , Masayuki Funami , Kiyohiro Iioka
- 申请人： Yuuko Yokota , Motoki Ito , Shigehiko Nagamine , Masayuki Funami , Kiyohiro Iioka
- 申请人地址： JP Kyoto
- 专利权人： Kyocera Corporation
- 当前专利权人： Kyocera Corporation
- 当前专利权人地址： JP Kyoto
- 代理机构： Hogan & Hartson LLP
- 优先权： JP2004-247510 20040826; JP2004-311245 20041026
- 主分类号： H01L41/04
- IPC分类号： H01L41/04
摘要：
An IDT electrode 3, and an input electrode section 5 and an output electrode section 6 each connecting with the IDT electrode 3 are formed in a filter region on one main surface of a piezoelectric substrate 2, and a semiconductor layer 22 is formed on the other main surface opposite to the one main surface of the piezoelectric substrate 2. The semiconductor layer 22 makes it possible to prevent pyroelectric destruction in the device manufacturing process as well as to prevent out-of-band attenuation characteristics from being degraded.
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