Patent US4446952A successfully refreshed from Google Patents.
Patent US3611054A successfully refreshed from Google Patents.
US3611054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetically sealed solid electrolytic capacitor
Assignee: Kemet Electronics Corp
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Filing: 1970-03-02
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Granted: 1971-10-05
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Expires: 1990-03-02
Abstract
Abstract The fabrication of hermetically sealed, solid electrolytic capacitors by first forming a high-temperature hermetic seal between a metallized ceramic header and a metal sleeve, and then inserting a solid electrolytic capacitor having a first lead wire welded to the capacitors anode lead in the sleeve with the nickel lead wire extending through a metallized opening in the header, solder sealing the other end of the metal sleeve, bonding the first nickel wire to the header as an anode lead and bonding a second nickel wire to the header as a cathode lead.
Inventors
- 👤 John Piper
- 👤 Roger J Raschiotto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:22
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/008; H01G9/08; H01G9/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
The article of claim 1 wherein the header compRises a metallized portion extending between its metallized peripheral portion and the point where the cathode lead wire is bonded to the header whereby an electrical path is formed by said metallized portion through the metallized peripheral portion of the header to the sleeve and through the solder body therein to the metallized surface of the capacitor body.
Claim 2
Dependent Claim
87 words
The article of claim 1 wherein the header comprises two spaced-apart openings insulated from each other and each having metallized interiors and overlapping rim portions on the surface of the header, and wherein the solderable metal anode lead wire extends through and is bonded in one of the openings, and the solderable metal cathode lead wire extends through the other of said openings and is bonded therein, the end of said cathode lead wire in the sleeve being soldered to the metallized surface on the capacitor body.
Claim 3
Dependent Claim
96 words
The article of claim 1 in which the header comprises two spaced-apart openings, the first of said openings having a metallized interior and overlapping rim portion therearound the second of said openings having a metallized interior and an overlapping metallized portion on the underside of the header extending to the metallized peripheral portion thereof, the solderable metal anode lead wire extending through the first of said openings and bonded therein, and the solderable metal cathode lead extending into and terminating within the second opening and bonded to the metallized portion on the underside of the header.
Claim 4
Dependent Claim
23 words
The article of claim 1 in which the peripheral seal between the header and the sleeve is a high-temperature containing silver solder seal.
Claim 5
Dependent Claim
20 words
The article of claim 1 in which the peripheral seal between the header and the sleeve is a brazed seal.
Claim 6
Dependent Claim
59 words
The article of claim 1 in which the capacitor body is a porous mass of pressed and sintered tantalum particles and the anode lead is a tantalum wire, and wherein said porous mass has a dielectric oxide film over its surfaces, a solid electrolyte layer thereon, a graphite layer over the electrolyte and a metallized layer over the graphite.
Claim 7
Dependent Claim
14 words
The article of claim 1 in which the solderable metal lead wires are nickel.
Claim 8
Dependent Claim
19 words
The article of claim 1 in which solderable metal wires are bonded to the header by high-temperature silver-containing solders.
Claim 9
Dependent Claim
13 words
The article of claim 1 in which the header is composed of alumina.
References Cited (Backward Citations)
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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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |