Patent US3169902A successfully refreshed from Google Patents.
Patent US5029043A successfully refreshed from Google Patents.
US5029043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
LC circuit incorporated ceramic substrate
Assignee: Mitsubishi Mining and Cement Co Ltd
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Filing: 1990-03-22
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Granted: 1991-07-02
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Expires: 2010-03-22
Abstract
Abstract There is provided a monolithic structure of an LC circuit incorporated component comprising at least one capacitor formed from internal electrodes in layered form in a ceramic monolithic structure, at least one inductor formed from internal conductive structure in coil form in said monolithic structure, internal connecting leads for connecting said capacitor(s) and inductor(s) to form said circuit, formed in said structure, and terminals for the circuit, formed at the surface(s) of the component.
Inventors
- 👤 Naoto Kitahara
- 👤 Masami Koshimura
- 👤 Mikiya Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:24
CPC Classifications
H; H10; H10D; H10D86/00; H10D86/80; H10D86/85
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
A monolithic structure of an LC-circuit incorporated component comprising: (a) at least one capacitor formed from internal electrodes in layered form in a ceramic monolithic structure; (b) at least one coil inductor formed from an internal conductive structure in said monolithic structure; (c) internal connecting leads for connecting the capacitor and the inductor to form a circuit in said monolithic structure; and (d) terminals for the circuit, formed at the surface of the component, wherein the ceramic structure is comprised of a dielectric and a magnetic material having a grain size of from 30 to 120 microns, and wherein at least one of the leads is formed through a throughhole formed in the structure; and wherein the dielectric material is selected from the group consisting of barium titanate, lead litinate, strontium titanate and combinations thereof; and wherein the magnetic material is a ferrite material of the general formula MFe 2 O 4 , wherein M is selected from the group consisting of manganese, nickel, magnesium, cobalt, copper, zinc, iron, and combinations thereof.
Claim 2
Dependent Claim
172 words
A monolithic structure of an LC-circuit incorporated component comprising: (a) at least one capacitor formed from internal electrodes in layered form in a ceramic monolithic structure; (b) at least one coil inductor formed from an internal conductive structure in said monolithic structure; (c) internal connecting leads for connecting the capacitor and the inductor to form a circuit in said monolithic structure; and (d) terminals for the circuit, formed at the surface of the component, wherein the ceramic structure is comprised of a dielectric and a magnetic material having a grain size of from 30 to 120 microns, and wherein at least one of the leads is formed through a throughhole formed in the structure; and wherein the dielectric material is selected from the group consisting of barium titanate, lead litinate, strontium titanate and combinations thereof; and wherein the magnetic material is a ferrite material of the general formula MFe 2 O 4 , wherein M is selected from the group consisting of manganese, nickel, magnesium, cobalt, copper, zinc, iron, and combinations thereof.
Claim 3
Dependent Claim
31 words
A structure in accordance with claim 1, wherein said structure further comprises at least one surface ceramic film which has been prefired and adhered onto the top surface of the structure.
Claim 4
Dependent Claim
43 words
A structure in accordance with claim 2, wherein said film is adhered to said top surface of said structure by using a solder, glass or conductive paste, each of which is located at predetermined positions on said surface of said structure and film.
Claim 5
Dependent Claim
28 words
A structure in accordance with claim 1, wherein said dielectric material has a dielectricity greater that 20 and wherein said magnetic material has a permeability greater than 1.
References Cited (Backward Citations)
US2648804A
Cited
US3900773A
Cited
US4322698A
Cited
US4573101A
Cited
US4689594A
Cited
US4758922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |