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US3569763A
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Multilayer photoconductive device having adjacent layers of different spectral response
Assignee: Toshiba Corp
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Filing: 1967-02-07
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Granted: 1971-03-09
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Expires: 1987-02-07
Abstract
Abstract A photoconductive structure includes first layers of a photoconductive material having one spectral response region and second layers of a different photoconductive material having a different spectral response region laminated one on another either alternately or in a predetermined order at least two times, the thickness of each layer being such that light penetrates therethrough, i.e., less than 2 Mu . Low-resistivity photoconductive materials can be used to provide multilayer structures having a high sensitivity to a predetermined range of wavelengths of light, for example, to the red-light region and a wide spectral region.
Inventors
- 👤 Yuji Kiuchi
- 👤 Shigeo Tsuji
- 👤 Hiroo Hori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:29
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/0433; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/45; H01J9/00; H01J9/20; H01J9/233; Y; Y10; Y10S; Y10S148/00; Y10S148/064; Y10S148/072
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
13 words
A multilayer photoconductive device according to claim 1 comprising at least five layers.
Claim 2
Dependent Claim
13 words
A multilayer photoconductive device according to claim 1 comprising at least seven layers.
Claim 3
Dependent Claim
71 words
A multilayer photoconductive device according to claim 1 for use as a target for an image pickup tube wherein said target is particularly sensitive to red light and comprises at least two first layers of lead oxide and a corresponding number of second layers of lead sulfide, each of said layers having a thickness of less than 2 Mu , said lead-oxide and lead-sulfide layers being alternately laminated on one another.
Claim 4
Dependent Claim
31 words
A The photoconductive target according to claim 4 wherein said first layers have a thickness of about 0.8 Mu and said second layers have a thickness of about 0.2 Mu .
Claim 5
Dependent Claim
28 words
The photoconductive target according to claim 4 wherein said first layers are of one type of conductivity and said second layers are of the opposite type of conductivity.
Claim 6
Dependent Claim
40 words
The photoconductive target according to claim 6 wherein said first layers contain at least one impurity element selected from antimony, arsenic and bismuth and said second layers contain at least one impurity element selected from oxygen, silver, copper and thallium.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |