Title:
ELECTROMECHANICAL CONVERSION ELEMENT, ULTRASONIC TRANSDUCER, ULTRASONIC PROBE, ULTRASONIC DIAGNOSTIC DEVICE, AND METHOD FOR MANUFACTURING ELECTROMECHANICAL CONVERSION ELEMENT
Document Type and Number:
Japanese Patent JP2021153293
Kind Code:
A
Abstract:
To provide an electromechanical conversion element that has a high frequency and high resolution and can ensure appropriate sound pressure and reception sensitivity.SOLUTION: In an ultrasonic transducer having a plurality of piezoelectric elements 20, the piezoelectric elements each have a substrate 11, a first electrode 21, a piezoelectric material 22, a second electrode 23, and a gap part 30 that is formed on the substrate 11 on the opposite side of the piezoelectric material 22 across the first electrode 21, which are sequentially laminated. The width Cw of the gap part 30 and the width Pw of the piezoelectric material 22 seen from the direction of sequential lamination satisfy the conditional expression (1): 0.65≤Pw/Cw≤0.95.SELECTED DRAWING: Figure 7
Inventors:
ANDO YUICHI
ABE SHUYA
MACHIDA OSAMU
ABE SHUYA
MACHIDA OSAMU
Application Number:
JP2021040482A
Publication Date:
September 30, 2021
Filing Date:
March 12, 2021
Export Citation:
Assignee:
RICOH CO LTD
International Classes:
H04R17/00; A61B8/00; H04R31/00
Attorney, Agent or Firm:
Shuichi Kudo