Patent EP0690369A2 successfully refreshed from Google Patents.
US5328718A
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US
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Production of barium titanate thin films
Assignee: Murata Manufacturing Co Ltd
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Filing: 1992-10-30
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Granted: 1994-07-12
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Expires: 2012-10-30
Abstract
Abstract A thin film of barium titanate is formed on a substrate by immersing the substrate in an aqueous solution containing barium ions and titanium alkoxide. The aqueous solution may contain not more than 20 vol % of one or more alkanolamines expressed by the general formula: HO(CnH2n)mNH3-m where n is not more than 10, and m=1, 2 or 3.
Inventors
- 👤 Yoshio Abe
- 👤 Yukio Hamaji
- 👤 Yukio Sakabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:35
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/69; H10P14/692; H10P14/6938; H10P14/69398; H10N; H10N30/00; H10N30/01; H10N30/07; H10N30/074; H10N30/077; H10N30/80; H10N30/85; H10N30/853; H10N30/8536; H10P14/63; H10P14/6326; H10P14/6342
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
46 words
A method for producing a thin film of barium titanate on a substrate, comprising the step of immersing a substrate in an aqueous solution containing barium ions and alkanolamine-modified titanium alkoxide under reaction conditions such that heterogeneous nucleation of barium titanate takes place on the substrate.
Claim 2
Independent Claim
46 words
A method for producing a thin film of barium titanate on a substrate, comprising the step of immersing a substrate in an aqueous solution containing barium ions and alkanolamine-modified titanium alkoxide under reaction conditions such that heterogeneous nucleation of barium titanate takes place on the substrate.
Claim 3
Dependent Claim
40 words
The method according to claim 1, wherein said aqueous solution contains not more than 20 vol % of one or more alkanolamines having the general formula: HO(C.sub.n H.sub.2n)mNH.sub.3-m where n is not more than 10, and m=1, 2 or 3.
Claim 4
Dependent Claim
46 words
The method according to claim 1, wherein said aqueous solution contains barium ions and titanium alkoxide in amounts, when respectively converted into molar concentrations of Ba 2+ ions and Ti 4+ ions, falling within the following respective ranges: 0.01 mM/l≦Ba.sup.2+ ≦150 mM/l, 0.01 mM/l≦Ti.sup.4+ ≦500 mM/l.
Claim 5
Dependent Claim
26 words
The method according to claim 1, further comprising the step of maintaining said aqueous solution at a temperature within the range of 50° to 110° C.
Claim 6
Dependent Claim
18 words
The method according to claim 1, wherein said aqueous solution has a pH value not less than 13.
References Cited (Backward Citations)
US4606906A
Cited
US4636378A
Cited
US4918035A
Cited
US4710227A
Cited
US4764493A
Cited
US4886654A
Cited
US5087437A
Cited
US5017534A
Cited
US5032559A
Cited
US5160762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-11 | 1998-01-10 | 1998-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-11 | 2002-01-10 | 2002-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-11 | 2006-01-10 | 2006-07-12 | $7700.00 | Window Closed / Lapsed |