US3869652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal oxide dielectric layers for capacitors
Assignee: International Standard Electric Corp
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Filing: 1973-03-14
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Granted: 1975-03-04
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Expires: 1993-03-14
Abstract
Abstract A wound metallized capacitor includes a plastic support layer having an evaporated metal electrode layer such as of aluminum, a deposited metal oxide dielectric layer such as titanium dioxide or niobium dioxide, and a second metal electrode layer. A second metal oxide layer, such as manganese dioxide, may be deposited on the metal electrode before the primary dielectric layer. Various other dielectrics and deposition processes may be used. The metal electrodes are alternately spaced from opposite ends and joined at each end to form lead connections. The plastic layer is preferably of a high temperature type to withstand processing.
Inventors
- 👤 Jean Paul Maillot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:17
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
A WOUND CAPACITOR COMPRISING AN INSULATING SUPPORT LAYER, A FIRST METALLIZED ELECTRODE LAYER ON SAID SUPPORT LAYER, A MANGANESE DIOXIDE LAYER ON SAID FIRST ELECTRODE LAYER, A METAL OXIDE DIELECTRIC LAYER ON SAID MANGANESE DIOXIDE LAYER, AND A SECOND METALLIZED ELECTRODE LAYER ON SAID METAL OXIDE DIELECTRIC LAYER, SAID METAL OXIDE DIELECTRIC LAYER BEING AN OXIDE OF A METAL OTHER THAN THAT OF THE METAL OF SAID SECOND ELECTRODE LAYER.
Claim 2
Dependent Claim
70 words
A WOUND CAPACITOR COMPRISING AN INSULATING SUPPORT LAYER, A FIRST METALLIZED ELECTRODE LAYER ON SAID SUPPORT LAYER, A MANGANESE DIOXIDE LAYER ON SAID FIRST ELECTRODE LAYER, A METAL OXIDE DIELECTRIC LAYER ON SAID MANGANESE DIOXIDE LAYER, AND A SECOND METALLIZED ELECTRODE LAYER ON SAID METAL OXIDE DIELECTRIC LAYER, SAID METAL OXIDE DIELECTRIC LAYER BEING AN OXIDE OF A METAL OTHER THAN THAT OF THE METAL OF SAID SECOND ELECTRODE LAYER.
Claim 3
Dependent Claim
47 words
The capacitor of claim 1 wherein the thickness of the metal oxide dielectric layer is equal to V/ sigma , wherein V is the maximum capacitor operating voltage and sigma is the dielectric strength in volts per unit of thickness of the material of the said layer.
Claim 4
Dependent Claim
33 words
The capacitor of claim 1 wherein the metal oxide dielectric layer is of a material of the group consisting of titanium dioxide, niobium oxide, zirconium oxide, tantalum oxide, aluminum oxide and hafnium oxide.
Claim 5
Dependent Claim
12 words
The capacitor of claim 3 wherein the electrode layers are of aluminum.
Claim 6
Dependent Claim
29 words
The capacitor of claim 3 wherein the insulating support layer is of a material of the group consisting of polyimide, polytetrafluorethylene, polyhydantoin, polysulfone, poly-4-methyl-pentene, ethylene polytherephtalate, polypropylene and polycarbonate.
Claim 7
Dependent Claim
14 words
The capacitor of claim 3 wherein said metal oxide dielectric layer is titanium dioxide.
Claim 8
Dependent Claim
79 words
The capacitor of claim 3 wherein said first electrode layer is spaced from one end of said wound capacitor and said second electrode layer is spaced from the other end, said capacitor including a plurality of wound layers of said insulation support, first metallized electrode, first metal oxide, metal oxide dielectric and second metallized electrode, and a pair of metal end coatings connecting respective alternate first and second spaced electrode layers on each end together to provide leads thereto.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |