US4587041A
Expired / Lapsed
US
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Method for manufacturing dielectric metal titanate
Assignee: Sony Corp
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Filing: 1984-11-28
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Granted: 1986-05-06
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Expires: 2004-11-28
Abstract
Abstract A method for manufacturing dielectric metal titanate MTiO3 where M represents Ba and Sr is disclosed, which comprises the steps of preparing aqueous alkaline solution containing at least one metal salt selected from the group of barium and strontium and immersing metal titanium into the solution to form the metal titanate MTiO3 where M is at least one of barium and strontium. Further, there is disclosed a method for manufacturing dielectric metal titanate MTiO3 where M represents Ba and/or Sr which comprises the steps of preparing aqueous solution containing at least one metal salt selected from the group of barium and strontium, forming a metal titanium layer on a substrate, and immersing the substrate with the metal titanium layer into the solution to convert the metal titanium layer into the dielectric metal titanate MTiO3 where M is at least one of barium and strontium.
Inventors
- 👤 Satoru Uedaira
- 👤 Hiroshi Yamanoi
- 👤 Hidemasa Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:32
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/0029; H01G9/0032; C; C01; C01G; C01G23/00; C01G23/003; C01G23/006; C23; C23C; C23C22/00; C23C22/05; C23C22/60; C23C22/64; 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; C01P2002/70; C01P2002/72; C01P2002/76; C01P2002/77; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/62; C01P2006/00; C01P2006/32; C01P2006/33; C01P2006/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
Method for manufacturing dielectric metal titanate MTiO 3 where M represents Ba and/or Sr comprising the steps of: preparing an aqueous alkaline solution having a pH not lower than 12.2 and containing at least one salt of a metal selected from the group consisting of barium and strontium, said solution containing at least 0.1 mol/l of divalent barium or strontium ions, respectively; and immersing metal titanium into said solution at a temperature not less than 20° C. to form said metal titanate MTiO 3 where M is at least one of the metals barium and strontium.
Claim 2
Dependent Claim
96 words
Method for manufacturing dielectric metal titanate MTiO 3 where M represents Ba and/or Sr comprising the steps of: preparing an aqueous alkaline solution having a pH not lower than 12.2 and containing at least one salt of a metal selected from the group consisting of barium and strontium, said solution containing at least 0.1 mol/l of divalent barium or strontium ions, respectively; and immersing metal titanium into said solution at a temperature not less than 20° C. to form said metal titanate MTiO 3 where M is at least one of the metals barium and strontium.
Claim 3
Dependent Claim
114 words
Method for manufacturing dielectric metal titanate MTiO 3 where M represents Ba and/or Sr comprising the steps of: preparing aqueous alkaline solution having a pH not less than 12.2 and containing at least one salt of a metal selected from the group consisting of barium and strontium, said solution containing at least 0.1 mol/l of divalent barium or strontium ions, respectively; forming a metal titanium layer on a substrate; and immersing said substrate with said metal titanium layer into said solution at a temperature not less than 20° C. to convert said metal titanium layer into said dielectric metal titanate MTiO 3 where M is at least one of the metals barium and strontium.
Claim 4
Dependent Claim
114 words
Method for manufacturing dielectric metal titanate MTiO 3 where M represents Ba and/or Sr comprising the steps of: preparing aqueous alkaline solution having a pH not less than 12.2 and containing at least one salt of a metal selected from the group consisting of barium and strontium, said solution containing at least 0.1 mol/l of divalent barium or strontium ions, respectively; forming a metal titanium layer on a substrate; and immersing said substrate with said metal titanium layer into said solution at a temperature not less than 20° C. to convert said metal titanium layer into said dielectric metal titanate MTiO 3 where M is at least one of the metals barium and strontium.
Claim 5
Dependent Claim
34 words
Method according to claims 1 or 2, wherein said solution contains at least 0.1 mol/l of strontium salt and has a pH value not less than 13.0 and temperature not less than 55° C.
Claim 6
Dependent Claim
35 words
Method according to claim 2, wherein said metal titanium layer is partially converted into said metal titanate, thus forming a complex of metal titanium and metal titanate formed on the surface of said metal titanium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |