US4430689A
Expired / Lapsed
US
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Dielectric ceramic compositions, capacitors in which compositions of this type are employed, and a method of production of said compositions
Assignee: LCC- CICE EUROPEENEE DE COMPOSANTS ELECTRONIQUES Cie
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Filing: 1982-03-15
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Granted: 1984-02-07
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Expires: 2002-03-15
Abstract
Abstract Dielectric ceramic compositions of the ferroelectric type, especially for the fabrication of multilayer ceramic capacitors having improved properties, contain 90% to 98.5% by weight of barium titanate and 1.5% to 10% by weight of lithium fluoride, in which the barium titanate corresponds to the following formula: BaTiO 3 with a molar ratio TiO 2 /BaO which is lower than 1.
Inventors
- 👤 Alain Lagrange
- 👤 Alain Beauger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:21
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A multilayer ceramic capacitor comprising a plurality of electrodes of an electrically conducting material including a major proportion of silver, said electrodes being separated by a plurality of ceramic dielectric layers, two successive electrodes being separated by at least one dielectric layer, the electrodes of even-numbered rows and odd-numbered rows being respectively connected together electrically, wherein the ceramic composition is a dielectric ceramic composition having a high dielectric constant, wherein said composition contains 90% to 98.5% by weight of barium titanate and 1.5% to 10% by weight of lithium fluoride, in which the barium titanate corresponds to the formula: BaTiO 3 with a molar ratio x=(TiO 2 /BaO), wherein x is higher than or equal to 0.97 and lower than or equal to 0.98.
Claim 2
Dependent Claim
124 words
A multilayer ceramic capacitor comprising a plurality of electrodes of an electrically conducting material including a major proportion of silver, said electrodes being separated by a plurality of ceramic dielectric layers, two successive electrodes being separated by at least one dielectric layer, the electrodes of even-numbered rows and odd-numbered rows being respectively connected together electrically, wherein the ceramic composition is a dielectric ceramic composition having a high dielectric constant, wherein said composition contains 90% to 98.5% by weight of barium titanate and 1.5% to 10% by weight of lithium fluoride, in which the barium titanate corresponds to the formula: BaTiO 3 with a molar ratio x=(TiO 2 /BaO), wherein x is higher than or equal to 0.97 and lower than or equal to 0.98.
Claim 3
Dependent Claim
22 words
A multilayer ceramic capacitor according to claim 1, wherein said dielectric ceramic composition contains 2 to 5% by weight of lithium fluoride.
Claim 4
Dependent Claim
19 words
A multilayer ceramic capacitor according to claim 2, wherein said composition contains approximately 3% by weight of lithium fluoride.
Claim 5
Dependent Claim
19 words
A multilayer ceramic capacitor according to claim 1, wherein said electrically conducting material comprises 90% silver and 10% palladium.
Claim 6
Dependent Claim
17 words
A multilayer ceramic capacitor according to claim 1, wherein said electrically conducting material consists essentially of silver.
Claim 7
Dependent Claim
21 words
A multilayer ceramic capacitor according to claim 2, wherein the dielectric constant of the ceramic composition is about 5000 or higher.
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |