Title:
ULTRASONIC SENSOR
Document Type and Number:
WIPO Patent Application WO/2021/024790
Kind Code:
A1
Abstract:
An ultrasonic sensor (1) comprises a piezoelectric element (7), a first acoustic matching layer (2), and a second acoustic matching layer (5) which are laminated and bonded together, wherein the piezoelectric element (7) has a rectangular bonding surface. With regard to the first acoustic matching layer (2), which is adjacent to the piezoelectric element (7), a thermoplastic resin injected from the thickness direction of the first acoustic matching layer (2) is used to bond the piezoelectric element (7) and the first acoustic matching layer (2) together, the flow direction of the thermoplastic resin being matched with the long axis direction of the piezoelectric element (7). Due to this configuration, provided is the ultrasonic sensor (1) that exhibits excellent temperature characteristics such as thermal shock.
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Inventors:
MASUDA TOMOKI
ISHIZAKI YUDAI
NAGAHARA HIDETOMO
ISHIZAKI YUDAI
NAGAHARA HIDETOMO
Application Number:
PCT/JP2020/028212
Publication Date:
February 11, 2021
Filing Date:
July 21, 2020
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H04R17/00
Domestic Patent References:
| WO2012164890A1 | 2012-12-06 |
Foreign References:
| JP2004184423A | 2004-07-02 | |||
| JP2018061209A | 2018-04-12 | |||
| JP2014204387A | 2014-10-27 | |||
| JP2002058099A | 2002-02-22 | |||
| JP2018061209A | 2018-04-12 |
Other References:
See also references of EP 4013068A4
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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