US3898686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor radiation detector
Assignee: RCA Inc
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Filing: 1974-03-11
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Granted: 1975-08-05
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Expires: 1994-03-11
Abstract
Abstract A semiconductor unijunction device including a body of intrinsic semiconductor material having a pair of opposed surfaces. At one surface is a pair of spaced regions of opposite conductivity. At the opposite surface is a third region of either conductivity type. By controlling, in the intrinsic body, the curvature of the lines of equipotential of the electric field, a relationship of the current flowing into two of the semiconductor''s conductivity regions will indicate the wavelength of radiation falling on the device.
Inventors
- 👤 Jan Conradi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:58
CPC Classifications
H; H10; H10F; H10F30/00; H10F30/20; H10F30/29; H10F30/292; H10F99/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
113 words
A radiation detector comprising a body of intrinsic semiconductor material having a pair of opposed surfaces, two spaced regions of opposite conductivity type in said body at one of said surface, a third region of either conductivity type at the other of said surfaces, and means for applying a reverse biasing voltage between the two spaced regions, and for biasing said third region with the same polarity as the spaced region having the same conductivity as said third region, whereby a depletion region is provided in the intrinsic body and the current output from the regions of the same conductivity type provide an indication of the wavelength of radiation falling on said body.
Claim 2
Dependent Claim
113 words
A radiation detector comprising a body of intrinsic semiconductor material having a pair of opposed surfaces, two spaced regions of opposite conductivity type in said body at one of said surface, a third region of either conductivity type at the other of said surfaces, and means for applying a reverse biasing voltage between the two spaced regions, and for biasing said third region with the same polarity as the spaced region having the same conductivity as said third region, whereby a depletion region is provided in the intrinsic body and the current output from the regions of the same conductivity type provide an indication of the wavelength of radiation falling on said body.
Claim 3
Dependent Claim
41 words
The radiation detector in accordance with claim 1 in which said intrinsic material is of a pi type conductivity, the regions of the same conductivity are of a P type conductivity and said other region is of an N type conductivity.
Claim 4
Dependent Claim
29 words
The radiation detector in accordance with claim 2 in which said one surface of said intrinsic body has a carrier concentration different from the remaining portion of said body.
Claim 5
Dependent Claim
23 words
The radiation detector in accordance with claim 3 in which said surface is more P type than the remaining portion of said body.
Claim 6
Dependent Claim
23 words
The radiation detector in accordance with claim 3 in which said surface is less P type than the remaining portion of said body.
Claim 7
Dependent Claim
16 words
The radiation detector in accordance with claim 3 in which said surface is slightly N type.
Claim 8
Dependent Claim
41 words
The radiation detector in accordance with claim 1 in which said intrinsic material is of a Nu type conductivity, the regions of the same conductivity are of an N type conductivity and said other region is of a P type conductivity.
Claim 9
Dependent Claim
29 words
The radiation detector in accordance with claim 7 in which said one surface of said intrinsic body has a carrier concentration different from the remaining portion of said body.
Claim 10
Dependent Claim
23 words
The radiation detector in accordance with claim 8 in which said surface is less N type than the remaining portion of said body.
Claim 11
Dependent Claim
23 words
The radiation detector in accordance with claim 8 in which said surface is more N type than the remaining portion of said body.
Claim 12
Dependent Claim
16 words
The radiation detector in accordance with claim 8 in which said surface is slightly P type.
Claim 13
Dependent Claim
53 words
A radiation detector in accordance with claim 1 in which one of the two spaced conductivity regions at the one surface of the body at least partially surrounds the other of said two regions, and the conductivity type of said third region is the same as the conductivity type of the surrounded region.
Claim 14
Dependent Claim
29 words
The radiation detector in accordance with claim 1 wherein the third region is at the same potential as the spaced region having the same conductivity as said third region.
Claim 15
Dependent Claim
29 words
The radiation detector in accordance with claim 1 wherein the third region is at a different potential than the spaced region having the same conductivity as said third region.
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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |