Patent US5635892A successfully refreshed from Google Patents.
US5635892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High Q integrated inductor
Assignee: Nokia of America Corp
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Filing: 1994-12-06
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Granted: 1997-06-03
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Expires: 2014-12-06
Abstract
Abstract An inductive structure is provided which displays an increased self-inductance and improved Q at high frequencies. The improvement resides in the disposition proximate the inductive structure an amount of magnetic material to increase mutual inductance between adjacent portions of the inductor's conductive path with current flow.
Inventors
- 👤 Kirk B. Ashby
- 👤 Iconomos A. Koullias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:16
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/0006; H01F27/00; H01F27/34; H01F27/346; H01F27/348; H01F2017/0053; H01F2017/0066; H01F2017/0086
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
57 words
An inductive structure formed within a substrate and integrable with a semiconductor integrated circuit, comprising: a) an electrical conductor providing a conductive path formed as a spiral planar pattern upon said substrate; and b) a core of magnetic material in proximity to and facing said planar pattern, such core defining an opening in a central region thereof.
Claim 2
Dependent Claim
57 words
An inductive structure formed within a substrate and integrable with a semiconductor integrated circuit, comprising: a) an electrical conductor providing a conductive path formed as a spiral planar pattern upon said substrate; and b) a core of magnetic material in proximity to and facing said planar pattern, such core defining an opening in a central region thereof.
Claim 3
Dependent Claim
47 words
The inductive structure defined by claim 1, wherein said core has generally rectangular platform and includes four electrically isolated and segregated wedge portions, each wedge portion having a generally triangular platform such that said core defines diagonal openings extending between diagonally opening corners of the rectangular platform.
Claim 4
Dependent Claim
18 words
The inductive structure defined by claim 2, wherein said wedge portions each comprise multiple strips of magnetic material.
Claim 5
Dependent Claim
24 words
The inductive structure defined by claim 3, wherein said multiple strips disposed substantially at right angles to substantially adjacent lengths of said conductive path.
Claim 6
Dependent Claim
12 words
The inductive structure defined by claim 1, wherein said core is planar.
Claim 7
Dependent Claim
29 words
The inductive structure defined by claim 1, further including a layer of dielectric material disposed between said pattern and said core to electrically isolate said pattern from said core.
Claim 8
Dependent Claim
27 words
The inductive structure defined by claim 1, wherein said substrate is comprised of a material selected from the group consisting of a semiconductor and a dielectric material.
Claim 9
Dependent Claim
19 words
The circuit defined by claim 7, wherein said pattern and said core are positioned to provide high frequency operation.
Claim 10
Dependent Claim
24 words
The inductive structure defined by claim 1, wherein said pattern and said core are positioned to provide high frequency operation to around 12 GHz.
Claim 11
Dependent Claim
18 words
The inductive structure defined by claim 1, wherein adjacent lengths of said spiral planar pattern are substantially parallel.
Claim 12
Dependent Claim
60 words
A semiconductor integrated circuit comprising a substrate and an inductive structure, said inductive structure further comprising: a) an electrical conductor providing a conductive path in a form of a spiral planar pattern on said substrate; and b) a core of magnetic material in proximity to and facing said planar pattern, said core defining an opening in a central region thereof.
Claim 13
Dependent Claim
60 words
A semiconductor integrated circuit comprising a substrate and an inductive structure, said inductive structure further comprising: a) an electrical conductor providing a conductive path in a form of a spiral planar pattern on said substrate; and b) a core of magnetic material in proximity to and facing said planar pattern, said core defining an opening in a central region thereof.
Claim 14
Dependent Claim
46 words
The circuit of claim 11, wherein said core has a generally rectangular platform and includes four electrically isolated and segregated wedge portions, each wedge portion having a generally triangular platform such that said core defines diagonal openings extending between diagonally opposing corners of the rectangular platform.
Claim 15
Dependent Claim
16 words
The circuit of claim 12, wherein said wedge portions each comprise multiple strips of magnetic material.
Claim 16
Dependent Claim
23 words
The circuit of claim 13, wherein said multiple strips are disposed substantially at right angles to substantially adjacent lengths of said conductive path.
Claim 17
Dependent Claim
11 words
The circuit defined by claim 11, wherein said core is planar.
Claim 18
Dependent Claim
28 words
The circuit defined by claim 11, further including a layer of dielectric material disposed between said pattern and said core to electrically isolate said pattern from said core.
Claim 19
Dependent Claim
26 words
The circuit defined by claim 11, wherein said substrate is comprised of a material selected from the group consisting of a semiconductor and a dielectric material.
Claim 20
Dependent Claim
23 words
The circuit defined by claim 11, wherein said pattern and said core are positioned to provide high frequency operation to around 12 GHz.
Claim 21
Dependent Claim
17 words
The circuit defined by claim 11, wherein adjacent lengths of said spiral planar pattern are substantially parallel.
References Cited (Backward Citations)
US4979016A
Cited
US5027255A
Cited
US5095357A
Cited
US5225969A
Cited
US5206623A
Cited
US5233310A
Cited
US5243319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-02 | 2000-12-02 | 2001-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-02 | 2004-12-02 | 2005-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-02 | 2008-12-02 | 2009-06-03 | $7700.00 | Window Closed / Lapsed |