Invention Grant
- Patent Title: Piezoelectric resonator plate, piezoelectric resonator, method for manufacturing piezoelectric resonator plate, and method for manufacturing piezoelectric resonator
- Patent Title (中): 压电谐振器板,压电谐振器,压电谐振器板的制造方法以及压电谐振器的制造方法
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Application No.: US13881262Application Date: 2012-02-24
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Publication No.: US09130148B2Publication Date: 2015-09-08
- Inventor: Yoshinari Morimoto , Yoshinobu Sakamoto
- Applicant: Yoshinari Morimoto , Yoshinobu Sakamoto
- Applicant Address: JP Kakogawa-shi
- Assignee: DAISHINKU CORPORATION
- Current Assignee: DAISHINKU CORPORATION
- Current Assignee Address: JP Kakogawa-shi
- Agency: Mots Law, PLLC
- Agent Marvin A. Motsenbocker
- Priority: JP2011-039414 20110225
- International Application: PCT/JP2012/054611 WO 20120224
- International Announcement: WO2012/115239 WO 20120830
- Main IPC: H01L41/047
- IPC: H01L41/047 ; H03H9/05 ; H03H9/17 ; H03H9/125 ; H01L41/29 ; H03H3/02 ; H03H9/13 ; H03H9/21

Abstract:
A piezoelectric resonator plate includes at least a pair of excitation electrodes and at least a pair of extraction electrodes. The pair of extraction electrodes are respectively extracted from the pair of excitation electrodes to electrically and mechanically bond the pair of excitation electrodes to an external electrode. The pair of extraction electrodes each include a distal end portion. The distal end portion includes a connecting electrode extracted to a vicinity of one end portion on one principal surface of the piezoelectric resonator plate. The connecting electrodes each include a top surface where a first metal film to be bonded to the external electrode is formed. The first metal film includes a top surface with two or more protruding portions. The first metal film has a larger surface roughness and a smaller area compared with the respective connecting electrodes. The protruding portions are formed with cross-sections in curvature shapes.
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