Title:
ULTRASONIC TRANSDUCER
Document Type and Number:
WIPO Patent Application WO/2013/084910
Kind Code:
A1
Abstract:
The present invention achieves an ultrasonic transducer that has a structure suitable for use in the high-frequency band and that is highly durable. In addition, the sonic characteristics of the ultrasonic transducer are less likely to be affected by the bonding strength, contact pressure, and/or physical variation between members. The ultrasonic transducer (1A) is provided with a resin case (3) and a transducer (11). The resin case (3) has an opening (3A). The transducer (11) is provided with a matching layer (11A) and a piezoelectric element layer (11B). The piezoelectric element layer (11B) is configured so as to perform stand-alone thickness vibration, and the side surface of the piezoelectric element layer that intersects the main surface of the thickness direction faces and is in contact with the inner wall surface of the opening (3A). The matching layer (11A) is layered in the thickness direction of the piezoelectric element layer (11B), and the side surfaces that protrude from the opening (3A) in the thickness direction of the piezoelectric element layer (11B) and intersect the main surface of the thickness direction are free from the inner wall surface of the opening (3A).
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Inventors:
NISHIE JUNICHI (JP)
KONDO CHIKASHI (JP)
OTA JUNSHI (JP)
KONDO CHIKASHI (JP)
OTA JUNSHI (JP)
Application Number:
PCT/JP2012/081454
Publication Date:
June 13, 2013
Filing Date:
December 05, 2012
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04R17/00; H01L41/083
Foreign References:
| JPS6324799A | 1988-02-02 | |||
| JP3030404U | 1996-11-01 | |||
| JP2005108989A | 2005-04-21 | |||
| JP2005123554A | 2005-05-12 | |||
| JPS6270707A | 1987-04-01 |
Attorney, Agent or Firm:
Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
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Claims:
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