US5148078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field emission device employing a concentric post
Assignee: Motorola Solutions Inc
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Filing: 1990-08-29
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Granted: 1992-09-15
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Expires: 2010-08-29
Abstract
Abstract A device providing electric-field induced electron emission includes an annular edge for emission of charged particles. Particle emission is induced, at least in part, by the presence of a conducting or semi-conducting post within the periphery of the emitting edge.
Inventors
- 👤 Robert C. Kane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:52
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/10; H01J21/105; H01J9/00; H01J9/02; H01J9/022; H01J9/025
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
155 words
A field emission device comprising: a substrate having a surface; a central post electrode extending from said substrate surface; a first insulator layer disposed on said substrate surface and further disposed in a substantially annular and concentric fashion about said central post electrode; a conductive emitter layer disposed on said first insulator layer and further disposed in a substantially annular and concentric fashion about said central post electrode; a second insulator layer disposed on said conductive emitter layer and further disposed in a substantially annular and concentric fashion about said central post electrode; a gate electrode layer disposed on said second insulator layer and further disposed in a substantially annular and concentric fashion about said central post electrode; a third insulator layer disposed on said gate electrode layer and further disposed in a substantially annular and concentric fashion about said central pot electrode; and an anode electrode layer disposed non-coplanar with said gate electrode layer.
Claim 2
Dependent Claim
155 words
A field emission device comprising: a substrate having a surface; a central post electrode extending from said substrate surface; a first insulator layer disposed on said substrate surface and further disposed in a substantially annular and concentric fashion about said central post electrode; a conductive emitter layer disposed on said first insulator layer and further disposed in a substantially annular and concentric fashion about said central post electrode; a second insulator layer disposed on said conductive emitter layer and further disposed in a substantially annular and concentric fashion about said central post electrode; a gate electrode layer disposed on said second insulator layer and further disposed in a substantially annular and concentric fashion about said central post electrode; a third insulator layer disposed on said gate electrode layer and further disposed in a substantially annular and concentric fashion about said central pot electrode; and an anode electrode layer disposed non-coplanar with said gate electrode layer.
Claim 3
Dependent Claim
160 words
A field emission device comprising: a substrate having a surface; a plurality of central post electrodes extending from said substrate surface; a first insulator layer disposed on said substrate surface in a substantially annular and concentric fashion about individual central post electrodes; a conductive emitter layer disposed on said first insulator layer in a substantially annular and concentric fashion about at least some of said individual central post electrodes; a second insulator layer disposed on said conductive emitter layer in a substantially annular and concentric fashion about at least some of said individual central post electrodes; a gate electrode layer disposed on said second insulator layer in a substantially annular and concentric fashion about at least some of said individual central post electrodes; a third insulator layer disposed on said gate electrode layer and further disposed in a substantially annular and concentric fashion about said central post electrodes; and an anode electrode layer disposed non-coplanar with said gate electrode layer.
Claim 4
Dependent Claim
160 words
A field emission device comprising: a substrate having a surface; a plurality of central post electrodes extending from said substrate surface; a first insulator layer disposed on said substrate surface in a substantially annular and concentric fashion about individual central post electrodes; a conductive emitter layer disposed on said first insulator layer in a substantially annular and concentric fashion about at least some of said individual central post electrodes; a second insulator layer disposed on said conductive emitter layer in a substantially annular and concentric fashion about at least some of said individual central post electrodes; a gate electrode layer disposed on said second insulator layer in a substantially annular and concentric fashion about at least some of said individual central post electrodes; a third insulator layer disposed on said gate electrode layer and further disposed in a substantially annular and concentric fashion about said central post electrodes; and an anode electrode layer disposed non-coplanar with said gate electrode layer.
Claim 5
Dependent Claim
29 words
The field emission device of claim 2 wherein said anode electrode layer comprises conductive material proximally located with respect to said conductive emitter layer to collect electrons emitted therefrom.
Claim 6
Dependent Claim
157 words
A field emission device comprising: a substrate having a surface; a plurality of central post electrodes extending from said substrate surface; a first insulator layer disposed on said substrate surface in a substantially annular and concentric fashion about individual central post electrodes; a conductive emitter layer disposed on said first insulator layer in a substantially annular and concentric fashion about said individual central post electrodes; a second insulator layer disposed on said conductive emitter layer in a substantially annular and concentric fashion about said individual central post electrodes; a gate electrode layer disposed on said second insulator layer and comprising a plurality of electrically-isolated stripes each disposed in a substantially annular and concentric fashion about several individual central post electrodes; a third insulator layer disposed on said gate electrode layer and further disposed in a substantially annular and concentric fashion about said central post electrodes; and an anode electrode layer disposed non-coplanar with said gate electrode layer.
Claim 7
Dependent Claim
157 words
A field emission device comprising: a substrate having a surface; a plurality of central post electrodes extending from said substrate surface; a first insulator layer disposed on said substrate surface in a substantially annular and concentric fashion about individual central post electrodes; a conductive emitter layer disposed on said first insulator layer in a substantially annular and concentric fashion about said individual central post electrodes; a second insulator layer disposed on said conductive emitter layer in a substantially annular and concentric fashion about said individual central post electrodes; a gate electrode layer disposed on said second insulator layer and comprising a plurality of electrically-isolated stripes each disposed in a substantially annular and concentric fashion about several individual central post electrodes; a third insulator layer disposed on said gate electrode layer and further disposed in a substantially annular and concentric fashion about said central post electrodes; and an anode electrode layer disposed non-coplanar with said gate electrode layer.
Claim 8
Dependent Claim
157 words
A field emission device comprising: a substrate having a surface; a plurality of central post electrodes extending from said substrate surface; a first insulator layer disposed on said substrate surface in a substantially annular and concentric fashion about individual central post electrodes; a conductive emitter layer disposed on said first insulator layer and comprising a plurality of electrically-isolated stripes each disposed in a substantially annular and concentric fashion about several individual central post electrodes; a second insulator layer disposed on said conductive emitter layer in a substantially annular and concentric fashion about said individual central post electrodes; a gate electrode layer disposed on said second insulator layer in a substantially annular and concentric fashion about said individual central post electrodes; a third insulator layer disposed on said gate electrode layer and further disposed in a substantially annular and concentric fashion about said central post electrodes; and an anode electrode layer disposed non-coplanar with said gate electrode layer.
Claim 9
Dependent Claim
157 words
A field emission device comprising: a substrate having a surface; a plurality of central post electrodes extending from said substrate surface; a first insulator layer disposed on said substrate surface in a substantially annular and concentric fashion about individual central post electrodes; a conductive emitter layer disposed on said first insulator layer and comprising a plurality of electrically-isolated stripes each disposed in a substantially annular and concentric fashion about several individual central post electrodes; a second insulator layer disposed on said conductive emitter layer in a substantially annular and concentric fashion about said individual central post electrodes; a gate electrode layer disposed on said second insulator layer in a substantially annular and concentric fashion about said individual central post electrodes; a third insulator layer disposed on said gate electrode layer and further disposed in a substantially annular and concentric fashion about said central post electrodes; and an anode electrode layer disposed non-coplanar with said gate electrode layer.
Claim 10
Dependent Claim
181 words
A field emission device comprising: a substrate having a surface; a plurality of patterned central post conductive stripes disposed on said surface and having disposed thereon a plurality of central post electrodes, said central post electrodes extending from said substrate surface; a first insulator layer disposed on said substrate surface and further disposed in a substantially annular and concentric fashion about said plurality of central post electrodes; a conductive emitter layer disposed on said first insulator layer and further disposed as a plurality of stripes with annular openings substantially surrounding said plurality of central post electrodes; a second insulator layer disposed on said conductive emitter layer in a substantially annular and concentric fashion about said plurality of central post electrodes; a plurality of gate electrode stripes disposed on said second insulator layer in a substantially annular and concentric fashion about said central post electrodes; a third insulator layer disposed on said gate electrode stripes and further disposed in a substantially annular and concentric fashion about said central post electrodes; and an anode electrode layer disposed non-coplanar with said gate electrode stripes.
Claim 11
Dependent Claim
181 words
A field emission device comprising: a substrate having a surface; a plurality of patterned central post conductive stripes disposed on said surface and having disposed thereon a plurality of central post electrodes, said central post electrodes extending from said substrate surface; a first insulator layer disposed on said substrate surface and further disposed in a substantially annular and concentric fashion about said plurality of central post electrodes; a conductive emitter layer disposed on said first insulator layer and further disposed as a plurality of stripes with annular openings substantially surrounding said plurality of central post electrodes; a second insulator layer disposed on said conductive emitter layer in a substantially annular and concentric fashion about said plurality of central post electrodes; a plurality of gate electrode stripes disposed on said second insulator layer in a substantially annular and concentric fashion about said central post electrodes; a third insulator layer disposed on said gate electrode stripes and further disposed in a substantially annular and concentric fashion about said central post electrodes; and an anode electrode layer disposed non-coplanar with said gate electrode stripes.
Claim 12
Dependent Claim
22 words
The field emission device of claim 6 wherein said central post electrodes are operably connected to said patterned central post conductive stripes.
Claim 13
Dependent Claim
50 words
The field emission device of claim 7 wherein each of the plurality of gate electrode stripes is operably connected to only the corresponding central post conductive stripe of the plurality of central conductive stripes associated with other FEDs common to both the gate electrode stripe and central post conductive stripe.
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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) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |