US5040091A
Expired / Lapsed
US
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Feed-through capacitor
Assignee: Murata Manufacturing Co Ltd
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Filing: 1990-04-13
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Granted: 1991-08-13
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Expires: 2010-04-13
Abstract
Abstract A feed-through capacitor in which a composite dielectric layer made of a mixed material containing a resin material and dielectric material powder is arranged between a feedthrough terminal and an outer electrode terminal surrounding this feedthrough terminal, a capacitance being formed between the feedthrough terminal and the outer electrode terminal.
Inventors
- 👤 Osamu Yamaoka
- 👤 Katsumi Yukawa
- 👤 Shinichi Kobayashi
- 👤 Hideomi Kurihara
- 👤 Hisao Yuasa
- 👤 Shunjiro Imagawa
- 👤 Jun Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:24
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/35; H01B; H01B17/00; H01B17/26; H01B17/28; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
69 words
A feed-through capacitor comprising: at least one feedthrough terminal; an outer electrode terminal arranged so as to surround said feedthrough terminal; and a composite dielectric layer provided in at least a region between said feedthrough terminal and said outer electrode terminal and made of mixed material containing a resin material and a dielectric powder, said capacitor being formed by said feedthrough terminal, said outer electrode and said composite dielectric.
Claim 2
Dependent Claim
69 words
A feed-through capacitor comprising: at least one feedthrough terminal; an outer electrode terminal arranged so as to surround said feedthrough terminal; and a composite dielectric layer provided in at least a region between said feedthrough terminal and said outer electrode terminal and made of mixed material containing a resin material and a dielectric powder, said capacitor being formed by said feedthrough terminal, said outer electrode and said composite dielectric.
Claim 3
Dependent Claim
26 words
The feed-through capacitor according to claim 1, wherein said composite dielectric layer, surrounding the feed-feedthrough terminal and inside the outer electrode terminal, is formed by insertion-molding.
Claim 4
Dependent Claim
32 words
The feed-through capacitor according to claim 1, wherein said composite dielectric layer also extend outside of said outer electrode terminal, and said outer electrode terminal is embedded in the composite dielectric layer.
Claim 5
Dependent Claim
26 words
The feed-through capacitor according to claim 3, wherein said composite dielectric layer, surrounding the feedthrough terminal and the outer electrode terminal, is formed by insertion molding.
Claim 6
Dependent Claim
20 words
The feed-through capacitor according to claim 3, wherein a plurality of feedthrough terminals are surrounded by one outer electrode terminal.
Claim 7
Dependent Claim
20 words
The feed-through capacitor according to claim 1, wherein a plurality of feedthrough terminals are surrounded by one outer electrode terminal.
Claim 8
Dependent Claim
39 words
The feed-through capacitor according to claim 1, which further comprises a case containing the feedthrough terminal excluding end portions thereof, and containing the outer electrode terminal and the composite dielectric layer, and said case being filled with insulating resin.
Claim 9
Dependent Claim
35 words
The feed-through capacitor according to claim 1, wherein said mixed material consists essentially of 20 to 97 percent by weight of the ceramic powder and 3 to 80 percent by weight of the resin material.
Claim 10
Dependent Claim
17 words
The feed-through capacitor according to claim 8, wherein said ceramic powder is a BaTiO 3 system ceramic.
Claim 11
Dependent Claim
17 words
The feed-through capacitor according to claim 8, wherein said ceramic powder is a SrTiO 3 system ceramic.
Claim 12
Dependent Claim
14 words
The feed-through capacitor according to claim 8, wherein said resin material is epoxy resin.
Claim 13
Dependent Claim
15 words
The feed-through capacitor according to claim 8, wherein said resin material is polybutylene terephthalate resin.
Claim 14
Independent Claim
105 words
A method of fabricating a feedthrough capacitor, comprising the steps of: preparing at least one feed-through terminal and an outer electrode terminal of such size that the feedthrough terminal can be inserted into the interior thereof; arranging said feedthrough terminal within said outer electrode terminal so as not to come into contact with the outer electrode terminal; and filling a mixed material continuing a resin material and a dielectric powder into the space between said outer electrode terminal and said feedthrough terminal in a molten state and solidifying the same to form a composite dielectric layer to serve as the dielectric for said feed-through capacitor.
Claim 15
Independent Claim
105 words
A method of fabricating a feedthrough capacitor, comprising the steps of: preparing at least one feed-through terminal and an outer electrode terminal of such size that the feedthrough terminal can be inserted into the interior thereof; arranging said feedthrough terminal within said outer electrode terminal so as not to come into contact with the outer electrode terminal; and filling a mixed material continuing a resin material and a dielectric powder into the space between said outer electrode terminal and said feedthrough terminal in a molten state and solidifying the same to form a composite dielectric layer to serve as the dielectric for said feed-through capacitor.
Claim 16
Dependent Claim
18 words
The method according to claim 13, wherein said mixed material is filled and solidified by an insertion-molding process.
Claim 17
Dependent Claim
35 words
The feed-through capacitor according to claim 13, wherein said mixed material consists essentially of 20 to 97 percent by weight of the ceramic powder and 3 to 80 percent by weight of the resin material.
Claim 18
Dependent Claim
17 words
The feed-through capacitor according to claim 15, wherein said ceramic powder is a BaTiO 3 system ceramic.
Claim 19
Dependent Claim
17 words
The feed-through capacitor according to claim 15, wherein said ceramic powder is a SrTiO 3 system ceramic.
Claim 20
Dependent Claim
14 words
The feed-through capacitor according to claim 15, wherein said resin material is epoxy resin.
Claim 21
Dependent Claim
15 words
The feed-through capacitor according to claim 15, wherein said resin material is polybutylene terephthalate resin.
Claim 22
Dependent Claim
83 words
A feed-through capacitor comprising: at least one feed-through terminal; an outer electrode terminal made of a tubular conductive member arranged so as to surround said feed-through terminal; and a composite dielectric layer made of a mixed material containing a resin material and a dielectric powder surrounding the feed-through terminal and inside of the outer electrode terminal, said composite dielectric layer being formed by insertion-molding and extending outside of said outer electrode terminal, said outer electrode terminal being embedded in the composite dielectric layer.
Claim 23
Dependent Claim
83 words
A feed-through capacitor comprising: at least one feed-through terminal; an outer electrode terminal made of a tubular conductive member arranged so as to surround said feed-through terminal; and a composite dielectric layer made of a mixed material containing a resin material and a dielectric powder surrounding the feed-through terminal and inside of the outer electrode terminal, said composite dielectric layer being formed by insertion-molding and extending outside of said outer electrode terminal, said outer electrode terminal being embedded in the composite dielectric layer.
Claim 24
Dependent Claim
26 words
The feed-through capacitor according to claim 20, wherein said tubular conductive member is integral with a ground terminal which extends away from said tubular conductive member.
Claim 25
Dependent Claim
61 words
A feed-through capacitor comprising: at least one feedthrough terminal; an outer electrode terminal made of a tubular conductive member arranged so as to surround said feedthrough terminal; and a composite dielectric layer provided in at least a region between said feedthrough terminal and said outer electrode terminal and made of a mixed material containing the resin material and a dielectric powder.
Claim 26
Dependent Claim
61 words
A feed-through capacitor comprising: at least one feedthrough terminal; an outer electrode terminal made of a tubular conductive member arranged so as to surround said feedthrough terminal; and a composite dielectric layer provided in at least a region between said feedthrough terminal and said outer electrode terminal and made of a mixed material containing the resin material and a dielectric powder.
Claim 27
Dependent Claim
27 words
The feed-through capacitor according to claim 22, wherein said tubular conductive member is conductively connected with a ground terminal which extends away from said tubular conductive member.
Claim 28
Dependent Claim
19 words
The feed-through capacitor according to claim 23, wherein said ground terminal extends transversely away from said tubular conductive member.
Claim 29
Dependent Claim
45 words
The feed-through capacitor according to claim 24, further comprising first and second case portions which engage said ground terminal on opposite sides thereof and enclose the outer electrode terminal; the composite dielectric layer; and said feedthrough terminal and ground terminal, except for end portions thereof.
Claim 30
Dependent Claim
31 words
The feed-through capacitor according to claim 25, wherein said ground terminal has recess means formed therein for defining engagement locations where said first and second case portions engage said ground terminal.
References Cited (Backward Citations)
US3989531A
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US4733328A
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US4654751A
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US4734470A
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US4872085A
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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) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |