Patent US5400210A successfully refreshed from Google Patents.
US5400210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substrate having a built-in capacitor and process for producing the same
Assignee: Niterra Co Ltd
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Filing: 1993-06-23
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Granted: 1995-03-21
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Expires: 2013-06-23
Abstract
Abstract In a substrate having built-in capacitor which is incorporated in and united with an insulator, the capacitor has a dielectric layer made of a silicon nitride-based ceramic containing silicon carbide in an amount of from 13 to 30% by weight.
Inventors
- 👤 Noriyasu Sugimoto
- 👤 Yukihiro Kimura
- 👤 Masaharu Seto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:56
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
38 words
A substrate comprising a built-in capacitor incorporated in and united with an insulator, said capacitor comprising a dielectric layer made of a silicon nitride-based ceramic containing silicon carbide in an amount of from 13 to 30% by weight.
Claim 2
Dependent Claim
38 words
A substrate comprising a built-in capacitor incorporated in and united with an insulator, said capacitor comprising a dielectric layer made of a silicon nitride-based ceramic containing silicon carbide in an amount of from 13 to 30% by weight.
Claim 3
Dependent Claim
30 words
The substrate as in claim 1, wherein an electrode electron pattern has been printed on at least either of the insulator sheet and the dielectric sheet with a metallizing ink.
Claim 4
Dependent Claim
13 words
The substrate as in claim 2, wherein the metallizing ink is tungsten paste.
Claim 5
Dependent Claim
14 words
The substrate as in claim 1, wherein the silicon carbide is α-form silicon carbide.
Claim 6
Dependent Claim
14 words
The substrate as in claim 1, wherein the silicon carbide is β-form silicon carbide.
Claim 7
Dependent Claim
104 words
A process for producing a substrate comprising a built-in capacitor which comprises the steps of: (a) forming an insulator sheet comprising an insulating ceramic; (b) preparing a mixture containing from 13 to 30% by weight of silicon carbide, with the remainder comprising silicon nitride and a sintering aid, and forming the mixture into a dielectric sheet; (c) printing an electrode pattern on at least either of the insulator sheet and the dielectric sheet using a metallizing ink; and (d) subsequently piling up at least one such insulator sheet and at least one such dielectric sheet and burning the assemblage to unite the sheets together.
Claim 8
Dependent Claim
104 words
A process for producing a substrate comprising a built-in capacitor which comprises the steps of: (a) forming an insulator sheet comprising an insulating ceramic; (b) preparing a mixture containing from 13 to 30% by weight of silicon carbide, with the remainder comprising silicon nitride and a sintering aid, and forming the mixture into a dielectric sheet; (c) printing an electrode pattern on at least either of the insulator sheet and the dielectric sheet using a metallizing ink; and (d) subsequently piling up at least one such insulator sheet and at least one such dielectric sheet and burning the assemblage to unite the sheets together.
Claim 9
Dependent Claim
17 words
The process for producing a substrate as in claim 6, wherein the metallizing ink is tungsten paste.
Claim 10
Dependent Claim
18 words
The process for producing a substrate as in claim 6, wherein the silicon carbide is α-form silicon carbide.
Claim 11
Dependent Claim
18 words
The process for producing a substrate as in claim 6, wherein the silicon carbide is β-form silicon carbide.
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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) | 1998-03-20 | 1998-09-19 | 1999-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-20 | 2002-09-19 | 2003-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-20 | 2006-09-19 | 2007-03-21 | $7700.00 | Window Closed / Lapsed |