US3757177A
Expired / Lapsed
US
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Monolithic base metal electrode capacitor
Assignee: Johanson Manufacturing Corp
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Filing: 1973-01-15
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Granted: 1973-09-04
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Expires: 1993-01-15
Abstract
Abstract A monolithic base metal electrode capacitor is provided comprising a dielectric of barium titanate containing about 15 percent to 25 percent of MnO2, 0.5 percent to 2 percent Fe2O3, 0.1 percent to 1 percent CeO2, and an effective amount of up to about 2 percent by weight of CaZrO3 sufficient to increase K to a value markedly in excess of 1,200 referred to room temperature. Between thin layers of the dielectric are interleaved deposited films of a base metal electrode, such as Ni, Co, Fe and alloys thereof, the edges of alternate films of the electrode being mechanically and electrically joined.
Inventors
- 👤 B Buehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:38
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1236; H01G4/1245; H01G4/005; H01G4/008; H01G4/0085
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
The method of claim 1, wherein the dielectric composition consists essentially by weight of about 18 percent to 20 percent MnO2, about 0.5 percent to 1 percent Fe2O3, about 0.1 percent to 0.5 percent CeO2 and the balance essentially at least about 78 percent BaTiO3 and wherein CaZrO3 is incorporated in said composition in an amount ranging from about 0.75 percent to 2 percent.
Claim 2
Dependent Claim
116 words
As an article of manufacture, a base metal electrode capacitor comprising a plurality of layers of a ceramic composition fired together, said layers of ceramic having interleaved therebetween films of a base metal electrode selected from the group consisting of nickel, cobalt, iron and alloys thereof, alternate films of said metal electrode being electrically coupled together, the composition of said ceramic consisting essentially by weight of about 15 percent to 25 percent MnO2, about 0.5 percent to 2 percent Fe2O3, about 0.1 percent to 1 percent CeO2, an effective amount of CaZrO3 up to about 2 percent sufficient to increase K at least about 20 percent, and the balance essentially at least about 72 percent BaTiO3.
Claim 3
Dependent Claim
63 words
The article of manufacture of claim 3, wherein the electrode metal is nickel and wherein the ceramic consists essentially by weight of about 18 percent to 20 percent MnO2, about 0.5 percent to 1 percent Fe2O3, about 0.1 percent to 0.5 percent CeO2, about 0.75 percent to 2 percent CaZrO3, and the balance essentially at least about 78 percent by weight of BaTiO3.
Claim 4
Dependent Claim
34 words
The article of manufacture of claim 4, wherein the ceramic consists essentially of approximately 78.5 percent BaTiO3, approximately 18.6 percent MnO2, approximately 0.9 percent Fe2O3, approximately 0.2 percent CeO2 and approximately 1.8 percent CaZrO3.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |