US3633077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor photoelectric converting device having spaced elements for decreasing surface recombination of minority carriers
Assignee: Toshiba Corp
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Filing: 1970-03-30
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Granted: 1972-01-04
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Expires: 1990-03-30
Abstract
Abstract A photoelectric converting device comprising a semiconductor substrate in one surface of which there are provided a plurality of junctions in a mosaic arrangement. In the portions of the opposite surface of said substrate which are in registration with and face said junctions is provided means to decrease effectively the surface recombination of minority carriers created due to the introduction of a light.
Inventors
- 👤 Shigeo Tsuji
- 👤 Shunji Shirouzu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:15
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/45; H10; H10D; H10D99/00; Y; Y10; Y10S; Y10S257/00; Y10S257/917
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
140 words
A semiconductor photoelectric converting device which is scanned by an electron beam on a first surface thereof and which receives light on a second surface thereof comprising: a semiconductor substrate (10) of a given conductivity type, one surface of which corresponds to said first surface which is scanned by said electron beam; means (11) forming a plurality of spaced semiconductor junctions (12) in said substrate (10) and adjacent said one surface of said substrate (10) in a mosaic arrangement; and means including spaced elements disposed on the surface of said substrate opposite said one surface in registration with and facing said junctions (12), said opposite surface corresponding to said second surface of said converting device, for decreasing the surface recombination of minority carriers created in said converting device when impinged by light on said opposite surface of said substrate (10).
Claim 2
Dependent Claim
140 words
A semiconductor photoelectric converting device which is scanned by an electron beam on a first surface thereof and which receives light on a second surface thereof comprising: a semiconductor substrate (10) of a given conductivity type, one surface of which corresponds to said first surface which is scanned by said electron beam; means (11) forming a plurality of spaced semiconductor junctions (12) in said substrate (10) and adjacent said one surface of said substrate (10) in a mosaic arrangement; and means including spaced elements disposed on the surface of said substrate opposite said one surface in registration with and facing said junctions (12), said opposite surface corresponding to said second surface of said converting device, for decreasing the surface recombination of minority carriers created in said converting device when impinged by light on said opposite surface of said substrate (10).
Claim 3
Dependent Claim
59 words
The device according to claim 1 wherein said means for decreasing the surface recombination of minority carriers comprises a plurality of spaced layers (15) formed in said opposite surface of said substrate (10) and having the same type of conduCtivity as, but a higher impurity concentration than, said substrate (10), each layer (15) corresponding to a respective junction (12).
Claim 4
Dependent Claim
26 words
The device according to claim 2 wherein the area of each of said layers (15) is not greater than the area of its respective junction (12).
Claim 5
Dependent Claim
82 words
The device according to claim 1 wherein said means for decreasing the surface recombination of minority carriers comprises a layer (20) of semiconductor material formed on said opposite surface of said substrate (10) and having the same type of conductivity as, but a higher impurity concentration than, said substrate (10), and an opaque film (21) formed on the surface of said layer (20) except for the portions of said layer (20) which are in registration with and facing said semiconductor junctions (12).
Claim 6
Dependent Claim
14 words
The device according to claim 4 wherein said opaque film is a metallic film.
Claim 7
Dependent Claim
15 words
The device according to claim 4 wherein said opaque film is an opaque insulating film.
Claim 8
Dependent Claim
70 words
The device according to claim 1 wherein said means for decreasing the surface recombination of minority carriers comprises a plurality of spaced metal layers (30) formed on said opposite surface of said substrate (10) in registration with and facing said junctions (12), each of said metal layers (30) defining a metal semiconductor junction (31) with said substrate (10), and each of said metal layers corresponding to a respective junction (12).
Claim 9
Dependent Claim
35 words
The device according to claim 7 wherein said substrate (10) is of N-type conductivity and said metal of said spaced metal layers (30) has a smaller work function than that of said substrate semiconductor material.
Claim 10
Dependent Claim
35 words
The device according to claim 7 wherein said substrate (10) is of P-type conductivity and said metal of said spaced metal layers (30) has a larger work function than that of said substrate semiconductor material.
Claim 11
Dependent Claim
31 words
The device according to claim 1 further including an insulating film (13) formed on said one surface of said substrate (10) except for the portions thereof corresponding to said junctions (12).
Claim 12
Dependent Claim
35 words
The device according to claim 10 further including a semi-insulating layer (14) formed on said insulating film (13) and on the portions corresponding to said junctions (12) on said one surface of said substrate (10).
Claim 13
Dependent Claim
38 words
The device according to claim 1 wherein said means forming said plurality of spaced semiconductor junctions includes plurality of spaced semiconductor regions (12) in said substrate (10) and having a conductivity type opposite to that of said substrate.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |