US4926292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broadband printed spiral
Assignee: BLUME LINDA A
•
Filing: 1989-08-09
•
Granted: 1990-05-15
•
Expires: 2009-08-09
Abstract
Abstract A thin film printed circuit inductive element exhibiting low Q wherein a conductive spiral is deposited on an insulating substrate and resistive links are connected between adjacent turns of the spiral. Inherent resonance is thereby damped out.
Inventors
- 👤 Marshall Maple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:58
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/16; H05K1/165; H01; H01F; H01F17/00; H01F17/0006; H10; H10D; H10D86/00; H10D86/80; H10D86/85; H05K1/167; H05K2201/00; H05K2201/03; H05K2201/0302; H05K2201/0317; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
48 words
A thin film printed circuit inductive element comprising: (a) a substrate of insulating material having a principal planar surface; (b) a layer of conducting material deposited on the planar surface in a spiral path; (c) a plurality of resistive links which connect adjacent turns of the spiral path.
Claim 2
Dependent Claim
48 words
A thin film printed circuit inductive element comprising: (a) a substrate of insulating material having a principal planar surface; (b) a layer of conducting material deposited on the planar surface in a spiral path; (c) a plurality of resistive links which connect adjacent turns of the spiral path.
Claim 3
Dependent Claim
21 words
A thin film printed circuit inductive element according to claim 1, wherein the resistive links are deposited on the planar surface.
Claim 4
Dependent Claim
22 words
A thin film printed circuit inductive element according to claim 1, wherein the turns of the spiral path are rectangular in shape.
Claim 5
Dependent Claim
22 words
A thin film printed circuit inductive element according to claim 1, wherein the turns of the spiral path are circular in shape.
Claim 6
Dependent Claim
23 words
A thin film printed circuit inductive element according to claim 1, wherein the resistive links are approximately evenly spaced along the spiral path.
Claim 7
Dependent Claim
32 words
A thin film printed circuit inductive element according to claim 1, wherein the conductive material is comprised of a layer of titanium, a layer of platinum and a layer of electroplated gold.
Claim 8
Dependent Claim
29 words
A thin film printed circuit inductive element according to claim I, wherein the conductive material is comprised of a layer of titanium/platinum alloy and a layer of electroplated gold.
Claim 9
Dependent Claim
23 words
A thin film printed circuit inductive element according to claim 2, wherein the resistive links are comprised of a layer of tantalum nitride.
Claim 10
Dependent Claim
24 words
A thin film printed circuit inductive element according to claim 1, wherein the resistive links have a turn-to-turn resistance of less than ten ohms.
Claim 11
Dependent Claim
22 words
A thin film printed circuit inductive element according to claim 7, wherein the resistive links have a resistivity of approximately 60 Ω/□.
References Cited (Backward Citations)
US3505569A
Cited
US3798059A
Cited
US3967161A
Cited
US3947934A
Cited
US4035695A
Cited
US4016519A
Cited
US4160897A
Cited
US4310821A
Cited
US4482874A
Cited
US4494100A
Cited
US4706020A
Cited
US4626816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |