US5451426A
Expired / Lapsed
US
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Method for formation of barium titanate film
Assignee: Murata Manufacturing Co Ltd
•
Filing: 1993-04-08
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Granted: 1995-09-19
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Expires: 2013-04-08
Abstract
Abstract A thin film of barium titanate is formed on a substrate by immersing a substrate in an aqueous solution containing titanium ions along with a glass substance mainly comprising barium oxide and silicon dioxide. In the solution, barium ions are eluted from the glass substance with the solution to react with titanium ions in the solution to deposit barium titanate on the substrate.
Inventors
- 👤 Yoshio Abe
- 👤 Hiroshi Takagi
- 👤 Yukio Sakabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:23
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C01; C01G; C01G23/00; C01G23/003; C01G23/006; C04B41/45; C04B41/4505; C04B41/455; C04B41/50; C04B41/5025; C04B41/5041; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C23; C23C; C23C26/00; C23C26/02; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227; C01P; C01P2002/00; C01P2002/30; C01P2002/34; C04B2111/00; C04B2111/00474; C04B2111/00844
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
65 words
A method for formation of barium titanate film comprising the step of immersing a substrate in an aqueous solution of at least one titanium compound along with a glass substance predominantly comprising barium oxide and silicon dioxide to deposit barium titanate on the substrate by allowing barium ions eluted from the glass substance into the aqueous solution to react with titanium ions in the solution.
Claim 2
Independent Claim
65 words
A method for formation of barium titanate film comprising the step of immersing a substrate in an aqueous solution of at least one titanium compound along with a glass substance predominantly comprising barium oxide and silicon dioxide to deposit barium titanate on the substrate by allowing barium ions eluted from the glass substance into the aqueous solution to react with titanium ions in the solution.
Claim 3
Dependent Claim
22 words
The method claimed in claim 1 wherein said glass substance and said substrate are arranged close to one another in face-to-face relationship.
Claim 4
Dependent Claim
22 words
The method claimed in claim 1 wherein a content of barium oxide in said glass substance is 50 mole % or below.
Claim 5
Dependent Claim
18 words
The method claimed in claim 1 wherein said solution is an alkaline solution with pH 13 or above.
Claim 6
Dependent Claim
22 words
The method claimed in claim 1 wherein said solution is maintained at a temperature of 50° to 90° C. during film formation.
Claim 7
Dependent Claim
41 words
The method claimed in claim 1 wherein said aqueous solution is prepared by dissolving at least one titanium compound in water, said titanium compound being at least one compound selected from the group consisting of titanium alkoxides and alkanolamine-modified titanium alkoxides.
Claim 8
Independent Claim
70 words
A method for formation of barium titanate film, comprising the steps of: preparing an aqueous solution containing titanium ions; preparing a glass substance mainly comprising barium oxide and silicon dioxide; immersing said glass substance along with a substrate into said aqueous solution to deposit barium titanate on the substrate by allowing barium ions eluted from said glass substance into said aqueous solution to react with titanium ions in the solution.
Claim 9
Independent Claim
70 words
A method for formation of barium titanate film, comprising the steps of: preparing an aqueous solution containing titanium ions; preparing a glass substance mainly comprising barium oxide and silicon dioxide; immersing said glass substance along with a substrate into said aqueous solution to deposit barium titanate on the substrate by allowing barium ions eluted from said glass substance into said aqueous solution to react with titanium ions in the solution.
Claim 10
Dependent Claim
33 words
The method claimed in claim 7, wherein said aqueous solution is prepared by dissolving at least one titanium compound selected from the group consisting of titanium alkoxides and alkanolamine-modified titanium alkoxides in water.
Claim 11
Dependent Claim
13 words
The method claimed in claim 7, wherein said titanium compound is titanium alkoxide.
Claim 12
Dependent Claim
16 words
The method claimed in claim 7, wherein said titanium compound is titanium alkoxide modified by alkanolamine.
Claim 13
Dependent Claim
49 words
The method claimed in claim 7, wherein said titanium compound is titanium alkoxide modified by alkanolamine of the general formula: HO(C n H 2n ) m NH 3-m where n is an integer less than or equal to 10, and m is an integer of 1, 2 or 3.
Claim 14
Dependent Claim
24 words
The method claimed in claim 7, wherein said substrate is selected from the group consisting of sintered alumina, gold, silver, polymethyl, methacrylate and polyethylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-09-18 | 1999-03-20 | 1999-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-18 | 2003-03-20 | 2003-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-18 | 2007-03-20 | 2007-09-19 | $7700.00 | Window Closed / Lapsed |