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:
Feb. 28, 1995
Filed:
Aug. 27, 1993
Yuji Asai, Chita, JP;
Osamu Imai, Kasugai, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A piezoelectric semiconductor is a single crystal composed mainly of ZnO having properties such as electrical conductivity of 10.sup.-11 .about.10.sup.-3 1/.OMEGA..multidot.cm suitable for use as an acoustoelectric element, by adding a given amount of H.sub.2 O.sub.2 to the alkali solvent, or by using NH.sub.4 OH in the alkali solvent, or by doping the ZnO single crystal with Li or a trivalent metal. The piezoelectric semiconductor can be suitably used as a ultrasonic transducer material of acoustoelectric type and can also be used as a material for ultrasonic amplification, an surface acoustic wave filter, a piezoelectric transducer, a fluorescent material for emitting a low-velocity electron beam, etc.