US3788722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a gaseous breakdown display device
Assignee: PANEL Technology
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Filing: 1973-04-18
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Granted: 1974-01-29
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Expires: 1993-04-18
Abstract
Abstract A method for making a gaseous breakdown display device having a gas contained within a sealed volume between a transparent face and a dielectric body, said process comprising co-firing precious metal excitation electrodes and a dielectric body having a cavity, thereafter enclosing the gas in said cavity with a transparent face. The gaseous breakdown is contained by the device structure. The gaseous ions and intense heat generated by the discharge do not harm the components of the device made according to this invention because the device components are capable of operating at high temperatures in oxidizing atmospheres and are good conductors of heat. Consequently, the device can operate at high power density, which provides a high light output.
Inventors
- 👤 A Milgram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:42
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
190 words
A method for making a gaseous breakdown display device, which device comprises a monolithic inorganic dielectric body having precious metal excitation electrodes, a gas which has a high optical output under gaseous discharge conditions, and a transparent face; wherein the gas is contained within a sealed volume between the transparent face and the dielectric body; and wherein the electrodes are positioned in the dielectric body to excite the gas when an electrical potential is applied to said electrodes; said process comprising the steps of a. preparing a sheet comprising finely divided ceramic particles and a temporary binder therefor, said sheet having a cavity for the gas, b. screen-printing a paste onto said sheet in at least part of the electrode configuration desired, said paste comprising precious metal particles and a temporary binder therefor, c. sintering the substrate with paste applied for a time and at a temperature sufficient to volatilize the tempoerary binders and to sinter said ceramic particles and said metal particles into a monolithic structure wherein the metal particles form electrical conductors, d. filling the cavity with said gas, and e. enclosing the cavity with the transparent face.
Claim 2
Independent Claim
190 words
A method for making a gaseous breakdown display device, which device comprises a monolithic inorganic dielectric body having precious metal excitation electrodes, a gas which has a high optical output under gaseous discharge conditions, and a transparent face; wherein the gas is contained within a sealed volume between the transparent face and the dielectric body; and wherein the electrodes are positioned in the dielectric body to excite the gas when an electrical potential is applied to said electrodes; said process comprising the steps of a. preparing a sheet comprising finely divided ceramic particles and a temporary binder therefor, said sheet having a cavity for the gas, b. screen-printing a paste onto said sheet in at least part of the electrode configuration desired, said paste comprising precious metal particles and a temporary binder therefor, c. sintering the substrate with paste applied for a time and at a temperature sufficient to volatilize the tempoerary binders and to sinter said ceramic particles and said metal particles into a monolithic structure wherein the metal particles form electrical conductors, d. filling the cavity with said gas, and e. enclosing the cavity with the transparent face.
Claim 3
Dependent Claim
220 words
A method for making a gaseous breakdown display device according to claim 1 in which said device is part of a multilayer circuit board comprising a monolithic ceramic body, electrical conductors disposed in one or more layers within said body and bonded thereto, and interconnecting means entirely within said body linking said conductors in different layers, said conductors and interconnecting means being composed of gas-free precious metal particles sintered to said ceramic and to each other, said method comprising the steps of a. preparing a plurality of said sheets, one of said sheets having a cavity for said gas, b. forming holes for said interconnecting means at desired locations in at least one of said sheets, c. filling said holes with paste comprising gas-free precious metal particles and a temporary binder therefor, d. printing the paste on selected aReas of at least one of said sheets in the desired printed conductor configuration, e. assembling said sheets in a stack such that printed conductors and filled holes are in a desired relationship and such that the cavity for said gas is in the top of the uppermost layer, f. bonding said stacked sheets into a laminate, g. sintering as in step (c) of claim 1, h. filling the cavity with said gas, and i. sealing the cavity with the transparent face.
Claim 4
Dependent Claim
16 words
A method in accordance with claim 1 wherein the inorganic dielectric body consists essentially of alumina.
Claim 5
Dependent Claim
31 words
A method in accordance with claim 3 wherein the precious metal in the paste consists essentially of platinum and the paste is printed on said sheet prior to the sintering thereof.
Claim 6
Dependent Claim
28 words
A method in accordance with claim 3 wherein the precious metal in the paste consists essentially of silver and is applied to said sheet after the sintering thereof.
Claim 7
Dependent Claim
26 words
A method in accordance with claim 1 wherein the gas is selected from the group consisting of neon, argon, air, helium, kypton, xenon and mixtures thereof.
Claim 8
Dependent Claim
28 words
A method in accordance with claim 1 wherein there is made a gaseous breakdown display device which contains a plurality of excitation electrodes and sealed volumes of gas.
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |