US4803591A
Expired / Lapsed
US
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Dielectric ceramic composition for multilayer capacitor
Assignee: Mitsubishi Mining and Cement Co Ltd
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Filing: 1987-01-30
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Granted: 1989-02-07
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Expires: 2007-01-30
Abstract
Abstract A dielectric ceramic composition for multilayer ceramic capacitors is provided which consisting essentially of 94.70-99.39 mole % of barium titanate, 0.50-3.00 mole % of niobium pentoxide, 0.10-2.00 mole % of zinc oxide, and 0.01-0.30 mole % in terms of manganese dioxide.
Inventors
- 👤 Yasuo Miyashita
- 👤 Masao Kashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:54
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
66 words
A multilayer ceramic capacitor comprising a plurality of ceramic layers, a plurality of inner electrodes interposed between said ceramic layers, and outer electrodes on opposing sides of said capacitor for connecting alternate inner electrodes, wherein said ceramic layers consist essentially of 94.70-99.39 mole % of barium titanate, 0.50-3.00 mole % of niobium pentoxide, 0.10-1.00 mole % of zinc oxide, and 0.01-0.30 mole % of manganese dioxide.
Claim 2
Dependent Claim
66 words
A multilayer ceramic capacitor comprising a plurality of ceramic layers, a plurality of inner electrodes interposed between said ceramic layers, and outer electrodes on opposing sides of said capacitor for connecting alternate inner electrodes, wherein said ceramic layers consist essentially of 94.70-99.39 mole % of barium titanate, 0.50-3.00 mole % of niobium pentoxide, 0.10-1.00 mole % of zinc oxide, and 0.01-0.30 mole % of manganese dioxide.
Claim 3
Dependent Claim
28 words
The multilayer ceramic capacitor according to claim 1, wherein in the ceramic composition, the specific surface area diameter of barium titanate ranges between 0.2 μm and 1.0 μm.
Claim 4
Dependent Claim
36 words
A dielectric ceramic composition for multilayer ceramic capacitors consisting essentially of 94.70-99.39 mole % of barium titanate, 0.50-3.00 mole % of niobium pentoxide, 0.10-100 mole % of zinc oxide, and 0.01-0.30 mole % of manganese dioxide.
Claim 5
Dependent Claim
36 words
A dielectric ceramic composition for multilayer ceramic capacitors consisting essentially of 94.70-99.39 mole % of barium titanate, 0.50-3.00 mole % of niobium pentoxide, 0.10-100 mole % of zinc oxide, and 0.01-0.30 mole % of manganese dioxide.
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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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |