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. 20, 2001
Filed:
Apr. 15, 1998
Shan Sun, Colorado Springs, CO (US);
Thomas Domokos Hadnagy, Colorado Springs, CO (US);
Tom E. Davenport, Colorado Springs, CO (US);
Hiroto Uchida, Saitama, JP;
Tsutomu Atsuki, Saitama, JP;
Gakuji Uozumi, Saitama, JP;
Kensuke Kegeyama, Saitama, JP;
Katsumi Ogi, Saitama, JP;
Other;
Abstract
The ferroelectric thin film is formed from a liquid composition by the sol-gel processing which has a large amount of polarization, remarkably improved retention and imprint characteristics as compared with a PZT, minute grains and fine film quality, homogeneous electrical properties, and low leakage currents and which is suited for nonvolatile memories. The ferroelectric thin film of the present invention comprising a metal oxide represented by the general formula: (Pb,Ca,Sr,La,)(Zr,Ti,)O,, wherein 0.9≦V≦1.3, 0≦W≦0.1, 0≦X≦0.1, 0<Y≦0.1, 0<Z≦0.9 and at least either of W and X is not 0, is formed from a solution where thermally decomposable organometallic compounds of respective metals constituting said metal oxide, hydrolyzable organometallic compounds thereof, and partially hydrolyzed products and/or polycondensation products of said hydrolyzable organometallic compounds are dissolved in an organic solvent in such a proportion as to provide the metal atom ratio represented by the above-mentioned formula.