US3603850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic capacitor with counterelectrode
Assignee: Duracell Inc USA
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Filing: 1969-11-14
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Granted: 1971-09-07
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Expires: 1989-11-14
Abstract
Abstract A ceramic capacitor, particularly a miniature ceramic chip capacitor which can be varied in capacitance, primarily for use in hybrid integrated circuits. The capacitor''s metallic electrodes are external and coplanar, being separated by a recess in the ceramic body on one surface of the body, and on the oppositely opposed surface of the body is an external metallic counterelectrode. The capacitor can be varied in capacitance by varying the surface area of the counterelectrode.
Inventors
- 👤 John G Kirschner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:17
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/30; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
66 words
A capacitor comprising a body containing ceramic material having a plurality of coplanar surfaces separated by a shallow recess on one side thereof with a metallic electrode layer surface overlying each of said coplanar surfaces, and a metallic counterelectrode layer surface on the oppositely opposed side of said body whereby the surface area of said counterelectrode can be varied to vary the capacitance of the capacitor.
Claim 2
Dependent Claim
66 words
A capacitor comprising a body containing ceramic material having a plurality of coplanar surfaces separated by a shallow recess on one side thereof with a metallic electrode layer surface overlying each of said coplanar surfaces, and a metallic counterelectrode layer surface on the oppositely opposed side of said body whereby the surface area of said counterelectrode can be varied to vary the capacitance of the capacitor.
Claim 3
Dependent Claim
18 words
A capacitor according to claim 1, wherein said coplanar surfaces and said oppositely opposed side are substantially parallel.
Claim 4
Dependent Claim
15 words
A capacitor according to claim 2, wherein said capacitor has a pair of coplanar surfaces.
Claim 5
Dependent Claim
21 words
A capacitor according to claim 3, wherein said counterelectrode surface area is substantially proportional to the surface area of said electrodes.
Claim 6
Dependent Claim
77 words
A process for preparing a capacitor of claim 1 comprising forming a wafer containing a plurality of capacitor units separated by a substantially V-shaped groove, maturing said wafer, applying metallic electrode layers to said coplanar surfaces and a metallic counterelectrode layer on said oppositely opposed side, dicing said wafer to separate said capacitor units into individual capacitors, and varying the surface area of said counterelectrode to adjust the capacitance of the capacitor to a predetermined capacitance value.
Claim 7
Dependent Claim
19 words
A process according to claim 5, wherein said surface area of said counterelectrode is varied by abrading the counterelectrode.
Claim 8
Dependent Claim
30 words
A process according to claim 6, wherein the counterelectrode is abraded in such a manner to achieve a surface area thereof substantially proPortional to the surface area of said electrodes.
References Cited (Backward Citations)
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US3436605A
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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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |