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:
Nov. 13, 1979
Filed:
Sep. 07, 1978
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
Piezoelectric crystalline film of zinc oxide with a hexagonal crystal structure and a c-axis substantially perpendicular to the film surface, the crystalline film containing, as additive elements, vanadium and manganese together with or without copper. The piezoelectric crystalline films have high resistivity and a smooth surface, and make it possible to produce piezoelectric transducers with good conversion efficiency which can be used in a wide range of low to high frequencies. Such films can be made by a method comprising sputtering source materials, i.e., zinc oxide, vanadium and manganese together with or without copper onto a surface of a substrate to form a crystalline zinc oxide film, the sputtering being effected by using a film material source consisting essentially of a ceramic of zinc oxide containing vanadium, and manganese together with or without copper.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile