US4025328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing microchannel plate having rounded input faces
Assignee: US Philips Corp
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Filing: 1975-06-25
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Granted: 1977-05-24
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Expires: 1995-06-25
Abstract
Abstract A microchannel plate for secondary electron emission intensification, having channel walls which are rounded so as to increase the interception of secondary electrons formed due to the incidence of primary electrons on the ends of the said channel walls. According to the invention, the method of manufacturing such a channel plate consists of softening the channel wall material and by bombardment of the glass of the input surface by means of an energy-carrying beam of high power for a very short period of time. The glass of the walls at the input surface side then assumes a rounded shape under the influence of gravity and the surface stress of the glass.
Inventors
- 👤 Remy Henri Francois Polaert
- 👤 Alphonse Ducarre
- 👤 Valere Dominique Louis Duchenois
- 👤 Jean Rodiere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:53
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24; H01J43/246; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
A method of treating the input face of a glass microchannel plate to enhance radiation interception thereof, comprising the steps of: heating the input face of the glass microchannel plate to a temperature close to but below the softening temperature of the glass; bombarding the heated input face of the microchannel plate with an energy-carrying beam of 100 to 200 W/cm 2 for a time sufficient to round the input ends of the channel walls of the microchannel plate to enhance radiation interception.
Claim 2
Independent Claim
83 words
A method of treating the input face of a glass microchannel plate to enhance radiation interception thereof, comprising the steps of: heating the input face of the glass microchannel plate to a temperature close to but below the softening temperature of the glass; bombarding the heated input face of the microchannel plate with an energy-carrying beam of 100 to 200 W/cm 2 for a time sufficient to round the input ends of the channel walls of the microchannel plate to enhance radiation interception.
Claim 3
Dependent Claim
14 words
A method as defined in claim 1 wherein said time is approximately 0.7 seconds.
Claim 4
Dependent Claim
15 words
A method as defined in claim 1 wherein the energy-carrying beam is an electron beam.
Claim 5
Dependent Claim
15 words
A method as defined in claim 1 wherein the energy-carrying beam is a laser beam.
References Cited (Backward Citations)
US2608031A
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US2971294A
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US3051915A
Cited
US3366467A
Cited
US3395994A
Cited
US3558377A
Cited
US3724924A
Cited
US3758197A
Cited
US3811857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |