US 12,479,007 B2
Ultrasonic transducer
Yoshiki Ohta, Tokyo (JP); Mikio Sumiyoshi, Tokyo (JP); Nana Sato, Tokyo (JP); Mitsunao Homma, Tokyo (JP); and Hiroyuki Ijiri, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Feb. 17, 2022, as Appl. No. 17/674,102.
Claims priority of application No. 2021-037274 (JP), filed on Mar. 9, 2021.
Prior Publication US 2022/0288637 A1, Sep. 15, 2022
Int. Cl. B06B 1/06 (2006.01); G01S 7/521 (2006.01); G10K 11/00 (2006.01); G10K 9/122 (2006.01)
CPC B06B 1/0685 (2013.01) [G01S 7/521 (2013.01); G10K 11/002 (2013.01); G10K 11/004 (2013.01); G10K 9/122 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An ultrasonic transducer comprising:
a case including a bottom wall;
a piezoelectric element disposed on the bottom wall inside the case;
a wiring member electrically connected to the piezoelectric element;
a foaming member disposed on the piezoelectric element; and
a vibration damping material disposed between the piezoelectric element and the foaming member,
wherein:
the foaming member has a bottom surface opposing the piezoelectric element in a thickness direction of the piezoelectric element, a plurality of depressions being formed on the bottom surface,
the vibration damping material bonds the piezoelectric element and the bottom surface and seeps into the foaming member from the bottom surface.