US4053804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric for gas discharge panel
Assignee: International Business Machines Corp
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Filing: 1975-11-28
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Granted: 1977-10-11
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Expires: 1995-11-28
Abstract
Abstract A high resolution gaseous discharge display and/or memory device comprises a panel array of bistable charge storage areas designated gaseous discharge cells or sites, each cell having an associated pair of coordinate orthogonal conductors defining the cell walls which, when appropriately energized, produce a confined gaseous discharge in the selected sites. The conductors are insulated from direct contact with the gas by a dielectric insulator, the dielectric insulator being composed of a layer of refractory material having high secondary emission characteristics such as magnesium oxide doped with gold to prevent degradation of the dielectric layer during operation, to increase the memory margin and extend the life of the gaseous discharge panel, and to control the secondary emission characteristics and provide stable operating voltages for the panel.
Inventors
- 👤 M. Osama Aboelfotoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:13
CPC Classifications
H; H01; H01J; H01J11/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
79 words
In a gaseous discharge display device, the combination comprising an ionizable gaseous medium, a pair of nonconductive support members, conductor arrays formed on each of said support members, and a dielectric medium insulating at least one of said conductor arrays from contact with said gaseous medium, said ionizable gaseous medium contacting surface of said dielectric medium comprising a gold doped oxide in an amount sufficient to increase the memory margin of the panel while affording relatively stable operating voltages.
Claim 2
Dependent Claim
79 words
In a gaseous discharge display device, the combination comprising an ionizable gaseous medium, a pair of nonconductive support members, conductor arrays formed on each of said support members, and a dielectric medium insulating at least one of said conductor arrays from contact with said gaseous medium, said ionizable gaseous medium contacting surface of said dielectric medium comprising a gold doped oxide in an amount sufficient to increase the memory margin of the panel while affording relatively stable operating voltages.
Claim 3
Dependent Claim
20 words
Apparatus of the type claimed in claim 1 wherein said dielectric medium consists of a gold doped alkaline earth oxide.
Claim 4
Dependent Claim
16 words
Apparatus of the type claimed in claim 2 wherein said alkaline earth oxide comprises magnesium oxide.
Claim 5
Dependent Claim
27 words
Apparatus of the type claimed in claim 2 wherein said dielectric medium is composed of the same material as said gaseous medium contacting surface of said dielectric.
Claim 6
Dependent Claim
22 words
Apparatus of the type claimed in claim 3 wherein said gold doped magnesium oxide is in the form of a continuous layer.
Claim 7
Dependent Claim
22 words
Apparatus of the type claimed in claim 3 wherein said gold doped magnesium oxide is in the form of a discontinuous layer.
Claim 8
Dependent Claim
108 words
In a gaseous discharge device, the combination comprising a pair of nonconductive support members, conductor arrays formed on each of said support members, each of said conductor arrays comprising a plurality of substantially parallel conductors, means for sealing said support members to form a gaseous envelope having an ionizable gaseous medium, the conductors in said arrays being substantially orthogonal, and a dielectric medium formed over at least one of said conductor arrays, whereby the surface of said dielectric medium is in contact with said ionizable gas, said gas contacting surface of said dielectric medium comprising a gold doped oxide to enhance the memory margin of said discharge device.
Claim 9
Dependent Claim
108 words
In a gaseous discharge device, the combination comprising a pair of nonconductive support members, conductor arrays formed on each of said support members, each of said conductor arrays comprising a plurality of substantially parallel conductors, means for sealing said support members to form a gaseous envelope having an ionizable gaseous medium, the conductors in said arrays being substantially orthogonal, and a dielectric medium formed over at least one of said conductor arrays, whereby the surface of said dielectric medium is in contact with said ionizable gas, said gas contacting surface of said dielectric medium comprising a gold doped oxide to enhance the memory margin of said discharge device.
Claim 10
Dependent Claim
17 words
A device of the type claimed in claim 7 wherein said oxide comprises an alkali earth oxide.
Claim 11
Dependent Claim
17 words
A device of the type claimed in claim 8 wherein said alkali earth oxide comprises magnesium oxide.
Claim 12
Dependent Claim
17 words
A device of the type claimed in claim 8 wherein said alkali earth oxide comprises barium oxide.
Claim 13
Dependent Claim
15 words
A device of the type claimed in claim 7 wherein said oxide comprises silicon dioxide.
Claim 14
Dependent Claim
25 words
The invention defined in claim 7 wherein each of said conductor arrays has a dielectric medium insulating the conductors from direct contact with the gas.
Claim 15
Dependent Claim
29 words
A device of the type claimed in claim 12 wherein said dielectric medium is in the form of a continuous layer over the entire surface of said gaseous medium.
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) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |