US5055077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold cathode field emission device having an electrode in an encapsulating layer
Assignee: Motorola Solutions Inc
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Filing: 1989-11-22
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Granted: 1991-10-08
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Expires: 2009-11-22
Abstract
Abstract A cold cathode field emission device (100) having an encapsulating layer (109) formed through a low angle vapor deposition process. The encapsulation layer (109) includes an electrode (111). Depending upon the embodiment, the electrode can function as an anode (312) or as a gate (111).
Inventors
- 👤 Robert C. Kane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:05
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/022; H01J9/025
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
A method of providing a cold cathode field emission device, comprising the steps of: A) providing a cathode structure; B) providing a first portion of an encapsulating layer through low angle vapor deposition of insulating material; C) providing a second portion of the encapsulating layer through low angle vapor depostion of conductive material; such that the cathode structure is encapsulated within a substantially evacuated chamber, wherein the encapsulating layer includes an electrode formed therein.
Claim 2
Independent Claim
74 words
A method of providing a cold cathode field emission device, comprising the steps of: A) providing a cathode structure; B) providing a first portion of an encapsulating layer through low angle vapor deposition of insulating material; C) providing a second portion of the encapsulating layer through low angle vapor depostion of conductive material; such that the cathode structure is encapsulated within a substantially evacuated chamber, wherein the encapsulating layer includes an electrode formed therein.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the step of providing a cathode structure includes providing a substantially cone-shaped cathode.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the electrode comprises an anode.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein the electrode comprises a gate for controlling emission from the cathode.
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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) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |