US4609823A
Expired / Lapsed
US
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Charge transfer multi-linear strip
Assignee: Thales SA
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Filing: 1984-11-02
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Granted: 1986-09-02
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Expires: 2004-11-02
Abstract
Abstract A charge transfer multi-linear strip comprising several lines of photosensitive detectors, each line receiving successively the radiation to be detected and comprising charge transfer shift registers which provide in phase summing of the information collected at the detectors occupying the same position in the different lines, and wherein: said strip is adapted to radiology, the photosensitive detectors being photodiodes with a scintillator before these photodiodes and a screen being disposed to protect from the x rays the whole strip, except the photodiodes and their connections; there is a device for charge injection of the information between each connection connected to a detector and an input of a charge transfer shift register, said device comprising especially a charge injection diode connected to one of the connections and a screen grid brought to a constant potential, said grid providing biasing of the detector.
Inventors
- 👤 Jean L. Berger
- 👤 Pierre Descure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:31
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/15; H10F39/153; H10F39/1538; H04; H04N; H04N25/00; H04N25/70; H04N25/71; H04N25/711; H04N25/713; H10F39/151; H10F39/1515; H10F39/156
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
140 words
A charge transfer multi-linear strip comprising several lines of photosensitive detectors, each line receiving successively the radiation to be detected and comprising charge transfer shift registers which provide in phase summing of the information collected at the detectors occupying the same position in the different lines, and wherein: said strip is adapted to radiology, the photosensitive detectors being photodiodes with a scintillator before these photodiodes and a screen being disposed to protect from the x-rays the whole strip, except the photodiodes and their connections; there is a device for charge injection of the information between each connection connected to a detector and an input of a charge transfer shift register, said device comprising especially a charge injection diode connected to one of the connections and a screen grid brought to a constant potential, said grid providing biasing of the detector.
Claim 2
Dependent Claim
140 words
A charge transfer multi-linear strip comprising several lines of photosensitive detectors, each line receiving successively the radiation to be detected and comprising charge transfer shift registers which provide in phase summing of the information collected at the detectors occupying the same position in the different lines, and wherein: said strip is adapted to radiology, the photosensitive detectors being photodiodes with a scintillator before these photodiodes and a screen being disposed to protect from the x-rays the whole strip, except the photodiodes and their connections; there is a device for charge injection of the information between each connection connected to a detector and an input of a charge transfer shift register, said device comprising especially a charge injection diode connected to one of the connections and a screen grid brought to a constant potential, said grid providing biasing of the detector.
Claim 3
Dependent Claim
71 words
Strip as claimed in claim 1, wherein each charge injection device comprises: a grid adapted for retaining a charge amount, called first driver charge, intended to improve the charge transfer under the screen grid, said first driver charge being then restored to the screen grid and the injection diode; an injection grid which controls the passage of the charges to the input of a stage of a charge transfer shift register.
Claim 4
Dependent Claim
21 words
Strip as claimed in claim 2, wherein, under the injection grid, there is provided a compensation which raises the threshold thereof.
Claim 5
Dependent Claim
29 words
Strip according to claim 2, wherein each charge injection device comprises a lateral removal drain formed by a diode connected to the grid which retains the first driver charge.
Claim 6
Dependent Claim
25 words
Strip according to claim 4, wherein the shift registers and the charge injection devices comprise diffusions so that all the transfers are effected in volume.
Claim 7
Dependent Claim
40 words
Strip as claimed in claim 5, wherein the diffusion in the vicinity of the lateral removal drain formed by a diode is interrupted so that the transfer takes place on the surface between the charge injection device and this diode.
Claim 8
Dependent Claim
39 words
Strip as claimed in claim 5, wherein there is provided, under the grid which retains the first driver charge in the vicinity of the lateral removal drain formed by a diode, a compensation which partially raises the threshold thereof.
Claim 9
Dependent Claim
21 words
Strip accoding to claim 1, wherein there is provided, under the screen grid, a compensation which raises partially the threshold thereof.
Claim 10
Dependent Claim
25 words
Strip according to claim 1, wherein the shift registers and the charge injection devices comprise diffusions so that all the transfers are effected in volume.
Claim 11
Dependent Claim
14 words
Strip as claimed in claim 1, which is formed on the same semiconductor substrate.
Claim 12
Dependent Claim
39 words
Strip as claimed in claim 1, formed by the juxtaposition on a support of elementary strips comprising N lines and P columns of detectors of charge transfer shift registers, of charge injection devices and of multiplexing and output members.
Claim 13
Dependent Claim
16 words
Strip as claimed in claim 1, wherein the photosensitive elements are formed on an epitaxied substrate.
Claim 14
Dependent Claim
23 words
Strip as claimed in claim 1, wherein the connections extend over the whole of the zone of the strip comprising the photosensitive elements.
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) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |