US4516092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leadless filter component
Assignee: SFE TECHNOLOGIES A CORP OF CA
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Filing: 1983-02-18
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Granted: 1985-05-07
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Expires: 2003-02-18
Abstract
Abstract A leadless filter component for printed circuits comprises a monolithic ceramic capacitor chip having a ceramic nonconductive outer surface and at least two conductor terminals formed on said outer surface. An inductance including a bobbin and a conductor wound on the bobbin has the bobbin secured to the outer surface of the capacitor chip with the two ends of the conductor being electrically secured to said terminals to form a component having inductive and capacitive reactance.
Inventors
- 👤 Michael A. Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:36
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/0115
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
184 words
A π-filter comprising a monolithic ceramic capacitor chip including at least two groups of parallel conductive plates embedded in a ceramic chip, the plates of each group forming two sets, the plates of the first set being interleaved with the plates of the second set, the plates of the first set of both groups extending to a first face of the chip but not the other faces, the plates of the second set of both groups extending to a second face of the chip opposite the first face but not the other faces, a first conductive layer on the first face in electrical contact with the first set of plates of both the first and second groups, second and third conductive layers on second face of the chip in electrical contact respectively with the second set of plates of the first group and of the second group, and an inductor including a bobbin secured to a third face of the chip and a conductor wound on the bobbin, opposite ends of the conductor being electrically connected respectively to the second and third conductive layers.
Claim 2
Dependent Claim
184 words
A π-filter comprising a monolithic ceramic capacitor chip including at least two groups of parallel conductive plates embedded in a ceramic chip, the plates of each group forming two sets, the plates of the first set being interleaved with the plates of the second set, the plates of the first set of both groups extending to a first face of the chip but not the other faces, the plates of the second set of both groups extending to a second face of the chip opposite the first face but not the other faces, a first conductive layer on the first face in electrical contact with the first set of plates of both the first and second groups, second and third conductive layers on second face of the chip in electrical contact respectively with the second set of plates of the first group and of the second group, and an inductor including a bobbin secured to a third face of the chip and a conductor wound on the bobbin, opposite ends of the conductor being electrically connected respectively to the second and third conductive layers.
Claim 3
Dependent Claim
13 words
Apparatus of claim 1 wherein the bobbin is made of a magnetic material.
Claim 4
Dependent Claim
9 words
Apparatus of claim 2 wherein the material is ferrite.
Claim 5
Dependent Claim
20 words
Apparatus of claim 1 wherein the third face extends perpendicular to both the first and second faces of the block.
Claim 6
Dependent Claim
21 words
Apparatus of claim 4 wherein the conductive layers on the first and second faces overlap adjacent margins of the third face.
Claim 7
Dependent Claim
25 words
Apparatus of claim 1 wherein the bobbin and conductor are encapsulated by a layer of insulating material applied to the third face of the chip.
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) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |