Invention Grant
US07675389B2 Piezoelectric resonator, piezoelectric filter, and duplexer and communication device using the same
失效
压电谐振器，压电滤波器和双工器以及使用其的通信装置
- Patent Title: Piezoelectric resonator, piezoelectric filter, and duplexer and communication device using the same
- Patent Title (中): 压电谐振器，压电滤波器和双工器以及使用其的通信装置
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Application No.: US11916792Application Date: 2006-06-22
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Publication No.: US07675389B2Publication Date: 2010-03-09
- Inventor: Takehiko Yamakawa , Hiroshi Nakatsuka , Keiji Onishi
- Applicant: Takehiko Yamakawa , Hiroshi Nakatsuka , Keiji Onishi
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2005-190290 20050629
- International Application: PCT/JP2006/312488 WO 20060622
- International Announcement: WO2007/000929 WO 20070104
- Main IPC: H03H9/70
- IPC: H03H9/70 ; H03H9/15 ; H03H9/54
Abstract:
Three or more piezoelectric resonators having resonance frequencies different from one another are realized on the same substrate. First through third frequency adjustment layers of first through third piezoelectric resonators, respectively, provided on the same substrate 101 are formed by varying, among the frequency adjustment layers, the ratio of area (depressions 109 and 110) to be etched to area not to be etched.
Public/Granted literature
- US20080290969A1 Piezoelectric Resonator, Piezoelectric Filter, and Duplexer and Communication Device Using the Same Public/Granted day:2008-11-27
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