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. 25, 1992
Filed:
Aug. 16, 1989
Applicant:
Inventors:
Koetsu Saito, Tokyo, JP;
Masami Kawabuchi, Yokohama, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310358 ; 310334 ; 310337 ; 501 82 ;
Abstract
There is herein disclosed a piezoelectric composite transducer comprising a plurality of piezoelectric ceramic poles. The plurality of piezoelectric ceramic poles are arranged two-dimensionally so as to form spaces therebetween. Organic films are disposed on both end surfaces of the plurality of piezoelectric ceramic poles so that the spaces forms hollow portions. The hollow portions causes making small its acoustic impedance up to a value close to the acoustic impedance of water or a human body.