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:
May. 30, 2000
Filed:
Mar. 30, 1999
Mamoru Aizawa, Kyoto, JP;
KRI International, Inc., Osaka-Fu, JP;
Abstract
To form a thin film of ferroelectric substance by sol-gel method, there is provided a process for obtaining a precursor solution from which a coating solution enabling to form a thin film having a film thickness enough to exhibit its property can be obtained just by one coating operation without any multi-coating. After composing a Ti alkoxide oligomer having a cyclic structure or a ladder structure by hydrolysis and poly-condensation of a Ti alkoxide and composing a Zr alkoxide oligomer by hydrolysis and polycondensation of a Zr alkoxide, the Ti alkoxide oligomer is preliminarily hydrolyzed and reacted with the Zr alkoxide oligomer, whereby a Ti--O--Zr precursor is obtained, and a Pb(Ti--O--Zr) is obtained by reacting the Ti--O--Zr precursor with the Pb alkoxide.