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US6316866: Ferroelectric element and process for producing the same


Filing Information

Inventor(s) Shinichi Sakamaki · Yukimi Takahashi · Yorinobu Yamada · Motoyuki Toki · Mamoru Aizawa ·
Assignee(s) Citizen Watch Co., Ltd. ·
Attorney/Agent(s) Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. ·
Primary Examiner Thomas M. Dougherty ·
Application Number US9432230
Filing date 11/03/1999
Issue date 11/13/2001
Predicted expiration date 11/03/2019
U.S. Classifications 310/358  · 29/253.5  ·
International Classifications --
Kind CodeB1
International Classifications 310358 · 29 2535 ·
Related U.S. Application DataThis is a division of application Ser. No. 09/117,377, filed Jul. 29, 1998, which is a 371 of PCT/JP96/03745, filed Dec. 20, 1996.
Foreign Priority JP8187117 - 07/17/1996 · JP8232666 - 09/03/1996 · JP8238732 - 09/10/1996 · JP8263105 - 10/03/1996 ·
5 Claims, 16 Drawings


A ferroelectric element comprising a ferroelectric material containing at least two metals, the ferroelectric element having been produced by a process including a sol-gel process in the presence of a thickener and/or an association preventive from aqueous solutions of respective salts of the metals. The ferroelectric element is advantageous in that the handling of starting compounds and the production of the ferroelectric element are easy, the storage stability of the starting compound solution is good, the cost is low, the ferroelectric element can be formed as a thin layer, particles on the surface of the thin layer are fine and dense, and, hence, the surface smoothness is good. The ferroelectric element is excellent also in piezoelectric properties and therefore can be advantageously used as a piezoelectric element in a piezoelectric ink jet head.

Independent Claims | See all claims (5)

  1. 1. An aqueous ferroelectric precursor solution for use as a starting material in the production of a ferroelectric material containing at least two metals by a process including a sol-gel process, said aqueous ferroelectric precursor solution comprising a mixture of aqueous solutions of respective hydroxides of the metals; and a thickener, an association preventive or a combination thereof which has been added to the mixture; the aqueous precursor solution being suitable for being coated in a substrate and fired to form a thin layer of the ferroelectric material.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US5091348* Alcan International Limited Woodhead et al. Feb 1992
US5709783* McDonnell Douglas Corporation Sanchez et al. Jan 1998

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
JP542672Feb 1993
JP5319826Dec 1993
JP5221643Aug 1993
JP6119811Apr 1994
WO199013149Nov 1990
* cited by examiner

Referenced By

The current document is not referenced by other documents.