Patent US4833328A successfully refreshed from Google Patents.
US4833328A
Expired / Lapsed
US
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Forming contacts on diamonds
Assignee: TENON Ltd A CORP OF BRITISH VIRGIN ISLANDS
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Filing: 1987-06-22
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Granted: 1989-05-23
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Expires: 2007-06-22
Abstract
Abstract The invention provides a method of preparing a detector which is sensitive to ionizing radiation or atomic emissions. The method includes the steps of forming at least two discrete conductive regions on a counting diamond by ion implantation, at a temperature below 500° C. Subsequently, contacts are applied to the conductive regions to allow charged carriers liberated by the radiation to be detected by an electronic circuit. The invention extends to a detector prepared according to the method. An example of a detector according to the invention comprised a synthetic diamond having a paramagnetic nitrogen impurity concentration of less than 150 parts per million. Two conductive regions were formed on the diamond by bombardment with carbon ions, and contacts were formed on the conductive regions by the applications of silver-loaded epoxy paint.
Inventors
- 👤 Johan F. Prins
- 👤 Tom L. Nam
- 👤 Rex J. Keddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:03
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/26; H; H10; H10D; H10D64/00; H10D64/01; H10D64/011; H10D64/0111; H10D64/0114; H10F; H10F77/00; H10F77/20; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/00; H05K3/10; H05K3/105
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
104 words
A method of providing electrical contacts for a diamond detector which is sensitive to ionizing radiation or atomic emissions, including the steps of forming at least two discrete conductive regions extending below the surface of a counting diamond by ion implantation at a temperature below 500° C., and applying respective metallic contacts to the conductive regions to permit charge carriers liberated by the radiation or emissions to be detected by an electronic circuit, so that for a constant dose rate of radiation or emissions, a substantially linear relationship is obtained between a voltage applied to the contacts and a corresponding current through the detector.
Claim 2
Independent Claim
104 words
A method of providing electrical contacts for a diamond detector which is sensitive to ionizing radiation or atomic emissions, including the steps of forming at least two discrete conductive regions extending below the surface of a counting diamond by ion implantation at a temperature below 500° C., and applying respective metallic contacts to the conductive regions to permit charge carriers liberated by the radiation or emissions to be detected by an electronic circuit, so that for a constant dose rate of radiation or emissions, a substantially linear relationship is obtained between a voltage applied to the contacts and a corresponding current through the detector.
Claim 3
Dependent Claim
26 words
A method according to claim 1 in which the diamond is selected to have a paramagnetic nitrogen impurity concentration of less than 150 parts per million.
Claim 4
Dependent Claim
14 words
A method according to claim 1 in which the diamond is a synthetic diamond.
Claim 5
Dependent Claim
13 words
A method according to claim 1 in which the ions are carbon ions.
Claim 6
Dependent Claim
14 words
A method according to claim 1 in which the ions are selected metal ions.
Claim 7
Dependent Claim
21 words
A method according to claim 1 in which the contacts are applied by applying a metallic paint to the conductive regions.
Claim 8
Dependent Claim
22 words
A method according to claim 1 in which the contacts are applied by applying a conductive epoxy resin to the conductive regions.
Claim 9
Dependent Claim
25 words
A method according to claim 1 in which the conductivity of the conductive regions is improved by annealing of the diamond subsequent to ion implantation.
Claim 10
Dependent Claim
101 words
A detector which is sensitive to ionizing radiation or atomic emissions comprising a counting diamond having at least two discrete conductive regions formed therein and extending below the surface thereof, the conductive regions being formed by ion implantation at a temperature below 500° C., and respective metallic contacts applied to the conductive regions to permit charge carriers liberated by the radiation or emissions to be detected by an electronic circuit, so that for a constant dose rate of radiation or emissions, a substantially linear relationship is obtained between a voltage applied to the contacts and a corresponding current through the detector.
Claim 11
Dependent Claim
101 words
A detector which is sensitive to ionizing radiation or atomic emissions comprising a counting diamond having at least two discrete conductive regions formed therein and extending below the surface thereof, the conductive regions being formed by ion implantation at a temperature below 500° C., and respective metallic contacts applied to the conductive regions to permit charge carriers liberated by the radiation or emissions to be detected by an electronic circuit, so that for a constant dose rate of radiation or emissions, a substantially linear relationship is obtained between a voltage applied to the contacts and a corresponding current through the detector.
Claim 12
Dependent Claim
26 words
A detector according to claim 9 in which the diamond is selected to have a paramagnetic nitrogen impurity concentration of less than 150 parts per million.
Claim 13
Dependent Claim
14 words
A detector according to claim 9 in which the diamond is a synthetic diamond.
Claim 14
Dependent Claim
13 words
A detector according to claim 9 in which the ions are carbon ions.
Claim 15
Dependent Claim
14 words
A detector according to claim 9 in which the ions are selected metal ions.
Claim 16
Dependent Claim
19 words
A detector according to claim 9 in which the contacts comprise a metallic paint applied to the conductive regions.
Claim 17
Dependent Claim
20 words
A detector according to claim 9 in which the contacts comprise a conductive epoxy resin applied to the conductive regions.
Claim 18
Dependent Claim
25 words
A detector according to claim 9 in which the conductivity of the conductive regions is improved by annealing of the diamond subsequent to ion implantation.
Claim 19
Dependent Claim
17 words
A method according to claim 1 wherein the ion implantation is carried out at approximately 130° C.
Claim 20
Dependent Claim
16 words
A method according to claim 1 wherein the ion energy is between 30 and 150 keV.
Claim 21
Dependent Claim
19 words
A method according to claim 1 wherein the ion dose is approximately 2.5×10 16 ions per cm 2 .
Claim 22
Dependent Claim
19 words
A detector according to claim 9 wherein the ion dose is approximately 2.5×10 16 ions per cm 2 .
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) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |