US3909308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of lead monoxide coated vidicon target
Assignee: RCA Corp
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Filing: 1974-08-19
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Granted: 1975-09-30
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Expires: 1994-08-19
Abstract
Abstract A layer of substantially uniform lead monoxide is vapor deposited on a supported signal electrode of a vidicon target. The lead monoxide layer is formed on the signal electrode as a substantially homogeneous compensated intrinsic, or n type, electrically conductive material. An electrical potential is applied to the supported layer of lead monoxide to affect an electrical discharge through a continually renewed atmosphere consisting essentially of one of the inert gases, or nitrogen, whereby ion bombardment of the layer is accomplished.
Inventors
- 👤 John Franklin Heagy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:42
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/58; C23C14/5826; C23C14/5833; C23C14/0021; C23C14/06; C23C14/08; C23C14/584; H; H01; H01J; H01J9/00; H01J9/20; H01J9/233; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/007; Y10S148/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
58 words
A METHOD OF MANUFACTURING A PHOTOSENSETIVE DEVICE COMPRISING THE STEP OF IONICALLY BOMBARDING A SUPPORTED LAYER OF LEAD MONOXIDE, WITHIN AN ATMOSPHERE CONTAINING AT LEAST ONE GAS CHEMICALLY INERT WITH LEAD MONOXIDE AT A PRESSURE OF FROM ABOUT 4X10**-2 TO ABOUT 6XU/**-2 TORR, BY APPLYING AN ELECTRICAL POTENTIAL TO SAID LAYER TO EFFECT ELECTRICAL DISCHARGE THROUGH SAID ATMOSPHERE.
Claim 2
Independent Claim
58 words
A METHOD OF MANUFACTURING A PHOTOSENSETIVE DEVICE COMPRISING THE STEP OF IONICALLY BOMBARDING A SUPPORTED LAYER OF LEAD MONOXIDE, WITHIN AN ATMOSPHERE CONTAINING AT LEAST ONE GAS CHEMICALLY INERT WITH LEAD MONOXIDE AT A PRESSURE OF FROM ABOUT 4X10**-2 TO ABOUT 6XU/**-2 TORR, BY APPLYING AN ELECTRICAL POTENTIAL TO SAID LAYER TO EFFECT ELECTRICAL DISCHARGE THROUGH SAID ATMOSPHERE.
Claim 3
Dependent Claim
31 words
A method for manufacturing a photosensitive device in accordance with claim 1, wherein said atmosphere consists essentially of a gas selected from the group consisting of nitrogen and the inert gases.
Claim 4
Dependent Claim
26 words
A method for manufacturing a photosensitive device in accordance with claim 2, wherein said electrical discharge is for a period of time of about 1-5 minutes.
Claim 5
Dependent Claim
35 words
A method for manufacturing a photosensitive device in accordance with claim 3, wherein said supported layer comprises, prior to such electrical discharge, a substantially homogeneous layer of lead monoxide of one type of electrical conductivity.
Claim 6
Dependent Claim
42 words
A method for manufacturing a photosensitiVe device in accordance with claim 4, wherein said atmosphere is maintained in a dynamic state of flow and renewal by an apparatus and process in which continual flushing of said atmosphere abutting said layer is accomplished.
Claim 7
Dependent Claim
24 words
A method for manufacturing a photosensitive device in accordance with claim 5, wherein said gas comprises nitrogen having a dew point of about -35*C.
Claim 8
Dependent Claim
27 words
A method for manufacturing a photosensitive device in accordance with claim 6, wherein said atmosphere is maintained at a pressure of about 4 X 10 2 torr.
Claim 9
Dependent Claim
20 words
A method for manufacturing a photosensitive device in accordance with claim 1, wherein said lead monoxide layer is vapor deposited.
Claim 10
Dependent Claim
94 words
A method for manufacturing a photosensitive device in accordance with claim 8, wherein said vapor deposition of said lead monoxide layer is accomplished in an atmosphere of water vapor and oxygen, prior to said electrical discharge; wherein the atmosphere abutting said layer being vapor deposited is maintained in a dynamic state of flow and renewal by an apparatus and process by which continual flushing of that atmosphere is achieved during the period of time of said vapor deposition, whereby the pressure of said atmosphere is substantially maintained at about 1.4 X 10 2 torr.
Claim 11
Dependent Claim
31 words
A method for manufacturing a photosensitive device in accordance with claim 9, wherein said water vapor and oxygen comprising said atmosphere are in the ratio of about 10 to 4, respectively.
Claim 12
Dependent Claim
18 words
A method for manufacturing a photosensitive device in accordance with claim 10, wherein said ratio is substantially fixed.
Claim 13
Dependent Claim
28 words
A method for manufacturing a photosensitive device in accordance with claim 11, wherein said applied potential to said supported layer is from about 900 to about 1,000 volts.
Claim 14
Independent Claim
89 words
A method for manufacturing a photosensitive device comprising the steps of: a. vapor depositing a substantially uniform and homogeneous layer of lead monoxide upon a supporting member; then, b. ionically bombarding said layer by applying to said layer of lead monoxide an electrical potential to effect an electrical discharge through a continuously renewed atmosphere consisting essentially of a gas selected from the group consisting of nitrogen and the inert gases, and at a pressure of from about 4 X 10 2 torr to about 6 X 10 2 torr.
Claim 15
Independent Claim
89 words
A method for manufacturing a photosensitive device comprising the steps of: a. vapor depositing a substantially uniform and homogeneous layer of lead monoxide upon a supporting member; then, b. ionically bombarding said layer by applying to said layer of lead monoxide an electrical potential to effect an electrical discharge through a continuously renewed atmosphere consisting essentially of a gas selected from the group consisting of nitrogen and the inert gases, and at a pressure of from about 4 X 10 2 torr to about 6 X 10 2 torr.
Claim 16
Dependent Claim
28 words
A method for manufacturing a photosensitive device in accordance with claim 13, wherein said electrical discharge is for a period of time of about 1 to 5 minutes.
Claim 17
Dependent Claim
51 words
A method for manufacturing a photosensitive device in accordance with claim 14, wherein said vapor depositing is accomplished in a continuously renewed atmosphere consisting essentially of water vapor and oxygen in the ratio of about 10 to 4, respectively, at a pressure substantially maintained at about 1.4 X 10 2 torr.
Claim 18
Dependent Claim
28 words
A method for manufacturing a photosensitive device in accordance with claim 15, wherein said electrical potential applied to said layer is from about 900 to about 1,000 volts.
Claim 19
Dependent Claim
44 words
A method for manufacturing a photosensitive device in accordance with claim 16, wherein a surface of said supporting member upon which said vapor depositing of lead monoxide is accomplished is maintained during said vapor depositing at a temperature of between about 100* to 110*C.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |