Patent US3679950A successfully refreshed from Google Patents.
US3679950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic capacitors
Assignee: NL Industries Inc
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Filing: 1971-04-16
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Granted: 1972-07-25
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Expires: 1991-04-16
Abstract
Abstract A sintered ceramic article which comprises internal electrodes and/or conductors is formed by producing a sintered ceramic body that has areas of ceramic with interconnected pores extending to an outer face thereof and providing a conductor in said porous areas. The ceramic body may be formed by depositing, as by screen printing, on sheets of a powdered dielectric or insulating ceramic material bonded with a temporary bond, an area of a temporarily bonded powdered ceramic material which on firing becomes porous, consolidating a plurality of such sheets, and sintering them. Subsequently a conductive material may be provided in the porous areas by impregnating said areas with a conductive material or with a material which is reacted or decomposed to form a conductive material in said areas.
Inventors
- 👤 Truman C Rutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:23
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/30; H01G4/302; B; B32; B32B; B32B7/00; H10; H10W; H10W70/00; H10W70/60; H10W70/611; H10W70/67; H10W70/68; H10W70/685; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/00; H05K3/46; H05K3/4611; H05K3/4626; H05K3/4629
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
48 words
a plurality of vertically spaced porous ceramic strata in said matrix, each stratum having a network of interconnected pores and extending to one of a pair of edge regions of said body, alternate strata extending to the same edge region; and b. conducting material in said porous strata.
Claim 2
Dependent Claim
9 words
A monolithic capacitor comprising: a. a sintered unitary body;
Claim 3
Dependent Claim
75 words
a plurality of vertically spaced porous ceramic strata in said matrix, each stratum having a network of interconnected pores and extending to one of a pair of edge regions of said body, alternate strata extending to the same edge region; b. conducting material in said porous strata; and c. a pair of electrodes on said body, each electrode joining the conducting material in the several porous strata that extend to one of said edge regions.
Claim 4
Dependent Claim
17 words
A monolithic capacitor as set forth in claim 1 in which said conducting material is a metal.
Claim 5
Dependent Claim
16 words
A monolithic capacitor as set forth in claim 1 in which said conducting material is silver.
Claim 6
Dependent Claim
75 words
A multilayer circuit structure comprising: a sintered unitary body, said body having a matrix of an electrically insulating ceramic composition, and at least onE internal area extending to an edge region of said body composed of a ceramic composition, and at least one internal area extending to an edge region of said body composed of a ceramic composition and characterized by a network of interconnected pores, in which said porous area contains electrical conductive material.
Claim 7
Dependent Claim
16 words
A capacitor as set forth in claim 1 in which said dielectric ceramic composition comprises BaTiO3.
Claim 8
Dependent Claim
16 words
A capacitor as set forth in claim 1 in which said dielectric ceramic composition comprises TiO2.
Claim 9
Dependent Claim
21 words
A capacitor as set forth in claim 1 in which said matrix and said porous strata have the same chemical composition.
Claim 10
Dependent Claim
16 words
A capacitor as set forth in claim 1 in which said conducting material is an alloy.
Claim 11
Dependent Claim
17 words
A capacitor as set forth in claim 1 in which said conducting material comprises a conductive oxide.
Claim 12
Dependent Claim
16 words
A structure as set forth in claim 5 in which said insulating ceramic composition comprises alumina.
Claim 13
Dependent Claim
16 words
A structure as set forth in claim 5 in which said conducting material comprises a metal.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |