公开(公告)号：US20220288637A1

公开(公告)日：2022-09-15

申请号：US17674102

申请日：2022-02-17

Applicant: TDK CORPORATION

Inventor： Yoshiki OHTA ,  Mikio SUMIYOSHI ,  Nana SATO ,  Mitsunao HOMMA ,  Hiroyuki IJIRI

IPC: B06B1/06 ,  G01S7/521 ,  G10K11/00

Abstract: An ultrasonic transducer includes a case, a piezoelectric element, a wiring member, a foaming member, and a vibration damping material. The case includes a bottom wall. The piezoelectric element is disposed on the bottom wall inside the case. The wiring member is electrically connected to the piezoelectric element. The foaming member is disposed on the piezoelectric element. The vibration damping material is disposed between the piezoelectric element and the foaming member. The foaming member has a bottom surface opposing the piezoelectric element in a thickness direction of the piezoelectric element. A plurality of depressions is formed on the bottom surface. The vibration damping material bonds the piezoelectric element and the bottom surface.