Patent US4295073A successfully refreshed from Google Patents.
US4295073A
Expired / Lapsed
US
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Microchannel plate-in-wall structure
Assignee: United States Department of the Army
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Filing: 1978-03-28
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Granted: 1981-10-13
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Expires: 1998-03-28
Abstract
Abstract The invention relates to a microchannel plate-in-wall structure wherein a m portion of a microchannel plate extends through and is permanently sealed to a hollow generally cylindrical glass walled structure which is easily processed into an image intensifier tube, the external terminals of the plate being part of the electrodes deposited thereon.
Inventors
- 👤 Charles F. Freeman
- 👤 Kurt Villhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:49
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/505; H01J29/00; H01J29/02; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24; H01J43/246
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
165 words
A microchannel plate-in-wall structure comprising: a microchannel plate consisting of semiconducting glass, having anode and cathode surfaces and a plurality of electron multiplier channels therebetween; at least one continuous thin planar electrode deposited on each of said surfaces, said electrode extending substantially to the edge of said plate as well as adjacent to and surrounding one end of at least one of said channels; and a first hollow generally cylindrical glass wall section axially positioned normal to one of said surfaces and sealed with glass directly to said electrode and plate, said wall section at said surface having a minimum cross-section which encloses all of the ends of said channels at said one surface, and a maximum cross-section smaller than said one surface, whereby said one plate surface and each said one thin planar electrode it supports is divided into a pair of exposed portions which lie on opposite sides of said wall interconnected by a third portion sealed between said wall and said plate.
Claim 2
Dependent Claim
165 words
A microchannel plate-in-wall structure comprising: a microchannel plate consisting of semiconducting glass, having anode and cathode surfaces and a plurality of electron multiplier channels therebetween; at least one continuous thin planar electrode deposited on each of said surfaces, said electrode extending substantially to the edge of said plate as well as adjacent to and surrounding one end of at least one of said channels; and a first hollow generally cylindrical glass wall section axially positioned normal to one of said surfaces and sealed with glass directly to said electrode and plate, said wall section at said surface having a minimum cross-section which encloses all of the ends of said channels at said one surface, and a maximum cross-section smaller than said one surface, whereby said one plate surface and each said one thin planar electrode it supports is divided into a pair of exposed portions which lie on opposite sides of said wall interconnected by a third portion sealed between said wall and said plate.
Claim 3
Dependent Claim
23 words
A microchannel plate-in-wall structure according to claim 1 wherein said wall comprises: a lead oxide glass reduced by heating in a hydrogen atmosphere.
Claim 4
Dependent Claim
27 words
A microchannel plate-in-wall structure according to claim 1 wherein: said wall is sealed to said one surface with a glass frit which has been melted and devitrified.
Claim 5
Dependent Claim
17 words
A microchannel plate-in-wall structure according to claim 3 wherein: said frit is Corning Sealing Glass Code 7575.
Claim 6
Dependent Claim
68 words
A microchannel plate-in-wall structure according to claim 1 wherein: said anode and cathode surfaces each support a plurality of strip electrodes, each electrode on one broad surface surrounding the ends of channels which lie in one of a plurality of rows and each electrode on the remaining broad surfaces surrounding the ends of channels which lie in one of a plurality of columns substantially perpendicular to said rows.
Claim 7
Dependent Claim
38 words
A microchannel plate-in-wall structure according to claim 1 wherein: said microchannel plate is coated with a layer of SiO x having a thickness of 200 angstroms at least over the area where said wall intersects said one surface.
Claim 8
Dependent Claim
16 words
A microchannel plate-in-wall structure according to claim 6 wherein: the value of "x" is substantially unity.
Claim 9
Dependent Claim
35 words
A microchannel plate-in-wall structure according to claim 1 wherein: a second hollow wall section is sealed to the opposite broad surface of said microchannel plate in the same relationship thereto as said first wall section.
Claim 10
Dependent Claim
35 words
A microchannel plate-in-wall structure according to claim 5 wherein: a second hollow wall section is sealed to the opposite broad surface of said microchannel plate in the same relationship thereto as said first wall section.
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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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |