Patent US4618912A successfully refreshed from Google Patents.
US4618912A
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US
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Monolithic ceramic capacitor
Assignee: Murata Manufacturing Co Ltd
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Filing: 1985-07-12
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Granted: 1986-10-21
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Expires: 2005-07-12
Abstract
Abstract A monolithic ceramic capacitor implemented by a sintered body obtained by laminating a plurality of ceramic green sheets and simultaneously firing the same. Internal electrodes are formed by a lead or a lead alloy injected into a plurality of gaps opening in either side of a pair of end surfaces of the sintered body. External electrodes are provided on the pair of end surfaces and are formed by first layers mainly composed of nickel and second layers mainly composed of tin and provided on the outer sides of the first layers.
Inventors
- 👤 Yukio Sakabe
- 👤 Shintaro Karaki
- 👤 Kiyoshi Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:42
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/228; H01G4/232; H01G4/2325
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
A monolithic ceramic capacitor comprising a sintered body obtained by laminating a plurality of ceramic green sheets and simultaneously firing the same, said sintered body having a plurality of gaps opening in either side of a pair of end surfaces of said sintered body, said monolithic ceramic capacitor further including: a plurality of internal electrodes formed by injecting molten lead or lead alloy into said gaps; and a pair of external electrodes provided on said pair of end surfaces of said sintered body for extracting the electrostatic capacity, said external electrodes being formed of respective first layers including a fired paste mainly composed of Ni 3 B and respective second layers provided on the outer sides of said first layers.
Claim 2
Dependent Claim
120 words
A monolithic ceramic capacitor comprising a sintered body obtained by laminating a plurality of ceramic green sheets and simultaneously firing the same, said sintered body having a plurality of gaps opening in either side of a pair of end surfaces of said sintered body, said monolithic ceramic capacitor further including: a plurality of internal electrodes formed by injecting molten lead or lead alloy into said gaps; and a pair of external electrodes provided on said pair of end surfaces of said sintered body for extracting the electrostatic capacity, said external electrodes being formed of respective first layers including a fired paste mainly composed of Ni 3 B and respective second layers provided on the outer sides of said first layers.
Claim 3
Dependent Claim
42 words
A monolithic ceramic capacitor in accordance with claim 1, wherein said first layers are provided in advance of injection of said lead or lead alloy to serve as barriers for forming said internal electrodes, said second layers being formed after said injection.
Claim 4
Dependent Claim
20 words
A monolithic ceramic capacitor in accordance with claim 1, wherein said second layers are mainly composed of tin or lead-tin.
Claim 5
Dependent Claim
24 words
A monolithic ceramic capacitor in accordance with claim 1, wherein said paste mainly composed of Ni 3 B comprises Ni 3 B and borosilicate.
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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |