US3898539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin-film solid electrolytic capacitor and a method of making the same
Assignee: Panasonic Holdings Corp
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Filing: 1973-03-16
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Granted: 1975-08-05
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Expires: 1993-03-16
Abstract
Abstract A method of evaporating a thin film of TCNQ salt on an oxide dielectric film to produce a thin-film capacitor is disclosed. A source material composed of a TCNQ salt is heated to a predetermined source temperature at a rate of at least 4*C per second. A TCNQ salt is evaporated at the predetermined temperature being controlled within a variation of + OR - 2*C. An inactive metal is evaporated onto the TCNQ salt film to prevent it from oxidizing the inner surface of the cathode material.
Inventors
- 👤 Susumu Yoshimura
- 👤 Yoshimasa Ito
- 👤 Mutsuaki Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:29
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022; H01G9/025; H01G9/028
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
45 words
A thin-film solid electrolytic capacitor comprising, a valve metal, an oxide dielectric film formed thereon, a vapor deposited film of a TCNQ salt formed on said dielectric film and a cathode, said TCNQ salt film having a thickness of at most about 10 Mu .
Claim 2
Dependent Claim
45 words
A thin-film solid electrolytic capacitor comprising, a valve metal, an oxide dielectric film formed thereon, a vapor deposited film of a TCNQ salt formed on said dielectric film and a cathode, said TCNQ salt film having a thickness of at most about 10 Mu .
Claim 3
Dependent Claim
27 words
A thin-film solid electrolytic capacitor according to claim 1, wherein said capacitor further comprises a film of an inactive metal deposited on said film of TCNQ salt.
Claim 4
Dependent Claim
36 words
A thin-film solid electrolytic capacitor according to claim 1, wherein said TCNQ salt is selected from the group consisting of a diamine-TCNQ compound, tertiary and quarternary amine-TCNQ compounds, a quinoline TCNQ compound, and a pyridine-TCNQ compound.
Claim 5
Dependent Claim
23 words
A thin-film solid electrolytic capacitor according to claim 2, wherein said inactive metal is selected from the group consisting of gold and silver.
Claim 6
Dependent Claim
52 words
A thin-film solid electrolyte capacItor as claimed in claim 1, wherein said oxide dielectric film comprises a porous oxide dielectric film having a rugged surface and formed on said valve-metal, and a barrier oxide dielectric film formed on said porous oxide film to cover at least a portion of said rugged surface.
Claim 7
Dependent Claim
19 words
A thin-film solid electrolyte capacitor as claimed in claim 5, wherein said valve-metal has an etched and rough surface.
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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |