US5457598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High capacitance thin film capacitor
Assignee: Northrop Grumman Systems Corp
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Filing: 1994-04-08
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Granted: 1995-10-10
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Expires: 2014-04-08
Abstract
Abstract A multi-layer capacitor comprising a stack of sheet electrodes with an insulating dielectric layer sandwiched between these layers is disclosed. The dielectric layer formed on the electrode is prepared by the "sol-gel" process.
Inventors
- 👤 Kenneth C. Radford
- 👤 Stephen R. Gurkovich
- 👤 Andrew J. Piloto
- 👤 Deborah P. Partlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:06
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/30; H01G4/306
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A multi-layer capacitor comprising: a first stack of sheet electrodes having a thin dielectric film sandwiched between each of its surfaces, wherein said electrodes are arranged alternatively, said dielectric film being deposited by a sol-gel process; a second stack of sheet electrodes, each comprised of a metallized polymer film, said second stack of electrodes being positioned between alternate ones of the electrodes of said first stack of electrodes; means for electrically connecting the electrodes of said first stack of electrodes; and means for electrically connecting the electrodes of said second stack of electrodes.
Claim 2
Dependent Claim
93 words
A multi-layer capacitor comprising: a first stack of sheet electrodes having a thin dielectric film sandwiched between each of its surfaces, wherein said electrodes are arranged alternatively, said dielectric film being deposited by a sol-gel process; a second stack of sheet electrodes, each comprised of a metallized polymer film, said second stack of electrodes being positioned between alternate ones of the electrodes of said first stack of electrodes; means for electrically connecting the electrodes of said first stack of electrodes; and means for electrically connecting the electrodes of said second stack of electrodes.
Claim 3
Dependent Claim
15 words
A capacitor according to claim 1, in which said dielectric film comprises lead magnesium niobate.
Claim 4
Dependent Claim
18 words
A capacitor according to claim 2, in which said dielectric film has a thickness of about 1500-3000 Angstroms.
Claim 5
Dependent Claim
12 words
A capacitor according to claim 1 which is encapsulated in a polymer.
Claim 6
Dependent Claim
68 words
A capacitor according to claim 1 in which said thin film is deposited on said electrode by a process which comprises: (a) preparing a solution of alkoxide in alcohol in the presence of a small amount of water; (b) allowing the reaction to completion; (c) applying a sufficient amount of the resultant solution on to said electrode to form a thin film thereon; and (d) drying the film.
Claim 7
Dependent Claim
14 words
A capacitor according to claim 1 in which said electrode comprises silver or gold.
Claim 8
Dependent Claim
20 words
A capacitor according to claim 6 in which said silver or gold electrode has a thickness of about 50-100 μ.
Claim 9
Dependent Claim
18 words
A capacitor according to claim 2 in which said PMN comprises a small amount of PbTiO 3 .
References Cited (Backward Citations)
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US4868711A
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Cited
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Cited
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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) | 1998-10-09 | 1999-04-10 | 1999-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-09 | 2003-04-10 | 2003-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-09 | 2007-04-10 | 2007-10-10 | $7700.00 | Window Closed / Lapsed |