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. 14, 1979
Filed:
Jul. 24, 1978
Applicant:
Inventors:
Assignee:
Murata Manufacturing Co., Ltd., Nagaokakyoshi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310360 ; 252 692 ; 427100 ;
Abstract
Piezoelectric crystalline film on a substrate, which is a crystalline zinc oxide film with a c-axis perpendicular to the substrate surface, the crystalline zinc oxide film containing as additive elements, vanadium, manganese and at least one element selected from the group consisting of chromium, iron, cobalt and nickel. The piezoelectric crystalline films are homogeneous and have high resistivity and a smooth surface so that they can be used as a transducer with good conversion efficiency in a wide range of low to high frequencies.