US4274124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thick film capacitor having very low internal inductance
Assignee: International Business Machines Corp
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Filing: 1979-12-26
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Granted: 1981-06-16
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Expires: 1999-12-26
Abstract
Abstract A decoupling capacitor for highly integrated, fast switching logic circuit modules. The capacitor comprises stacked ceramic sheets having metallized surfaces. The sheets are connected together in groups. Alternate groups are connected to a first electrode. Intervening alternate groups are connected to a second electrode. The connections are all made to the same ends of all the sheets so that the current flows in opposite directions through adjacent facing plates.
Inventors
- 👤 Irving Feinberg
- 👤 Leon L. Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:26
CPC Classifications
H; H10; H10D; H10D86/00; H10D86/80; H10D86/85; H01; H01G; H01G4/00; H01G4/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
A capacitor comprising a multiplicity of closely spaced conductive plates, some of said plates being connected to a first terminal, the remainder of said plates being connected to a second terminal, said terminals comprising first and second parallel levels of metal separated by a first dielectric layer, said first and second levels of metal extending in a direction perpendicular to the direction of said plates said plates being spaced from each other by second dielectric layers, and means for connecting said plates at the same ends thereof to respective ones of said terminals whereby the current of said capacitor flows in opposite spacial directions in the adjacent facing plates, said means for connecting comprising a matrix of discrete connectors forming spaced parallel rows and spaced parallel columns at right angles to said rows.
Claim 2
Dependent Claim
133 words
A capacitor comprising a multiplicity of closely spaced conductive plates, some of said plates being connected to a first terminal, the remainder of said plates being connected to a second terminal, said terminals comprising first and second parallel levels of metal separated by a first dielectric layer, said first and second levels of metal extending in a direction perpendicular to the direction of said plates said plates being spaced from each other by second dielectric layers, and means for connecting said plates at the same ends thereof to respective ones of said terminals whereby the current of said capacitor flows in opposite spacial directions in the adjacent facing plates, said means for connecting comprising a matrix of discrete connectors forming spaced parallel rows and spaced parallel columns at right angles to said rows.
Claim 3
Dependent Claim
40 words
The capacitor of claim 1 wherein said means for connecting connects said plates in spaced groups, alternate ones of said groups being connected to said first electrode, and intervening alternate ones of said groups being connected to said second electrode.
Claim 4
Dependent Claim
16 words
The capacitor of claim 2 wherein each said group consists of the same number of plates.
Claim 5
Dependent Claim
27 words
The capacitor of claim 1 wherein each said dielectric layer is a ceramic sheet, and each said conductive plate is a conductive layer on said ceramic sheet.
Claim 6
Dependent Claim
24 words
The capacitor of claim 4 wherein said ceramic sheet is a barium titinate base material, and said conductive layer is a silver palladium paste.
Claim 7
Dependent Claim
18 words
The capacitor of claim 1 where adjacent ones of said plates are spaced by 1 to 3 mils.
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) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |