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:
Mar. 27, 2001
Filed:
Apr. 29, 1997
Masayuki Suzuki, Kanagawa, JP;
Naomi Nagasawa, Kanagawa, JP;
Akio Machida, Kanagawa, JP;
Takaaki Ami, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A layer-structured oxide exhibiting a paraelectric characteristic and a layer-structured oxide having a preferable remanent polarization, and a process of producing the same. A layer-structured oxide containing Bi, a first component Me, a second component R, and O is produced by heating raw materials at a high temperature of about 1400° C. for several ten minutes by a self-flux method using Bi,O,as a flux. The first component Me is composed of at least one kind selected from a group consisting of Sr, Pb, Ba, and Ca, and the second component R is composed of at least one kind selected from a group consisting of Nb and Ta. The composition formula of the oxide is expressed by Bi,Me,R,O,where a, b, and c are values in ranges of 0<a<2, 0<b≦0.4, and −0.3≦c≦1.4. The layer-structured oxide exhibits a paraelectric characteristic or a ferroelectric characteristic at a composition in a specific range out of the stoichiometric composition.