The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 1995
Filed:
Sep. 15, 1993
Applicant:
Inventors:
Yoshihiko Ishida, Nagoya, JP;
Makoto Tani, Inazawa, JP;
Assignee:
NGK Insulators, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310334 ; 310360 ;
Abstract
An ultrasonic transducer unit for use in pulse-echo ultrasonic investigation has a plurality of components including a piezoelectric ultrasonic wave transmitting element, an acoustoelectric ultrasonic wave receiving element and electrodes therefor. To provide a compact and efficient transducer, these components are bonded together in an integrated multilayer structure in which the transmitting element and receiving element are superimposed in the direction of propagation of transmitted and received ultrasonic waves. The receiving element may be a ZnO single crystal. An insulating layer isolates two components from each other.