Containing Cadmium Telluride Patents (Class 250/370.13)
  • Patent number: 10276627
    Abstract: A method of fabricating a solid state radiation detector method includes mechanically lapping and polishing the first and the second surfaces of a semiconductor wafer using a plurality of lapping and polishing steps. The method also includes growing passivation oxide layers by use of oxygen plasma on the top of the polished first and second surfaces in order to passivate the semiconductor wafer. Anode contacts are deposited and patterned on top of the first passivation oxide layer, which is on top of the first surface. Cathode contacts, which are either monolithic or patterned, are deposited on top of the second passivation oxide layer, which is on the second surface. Aluminum nitride encapsulation layer can be deposited over the anode contacts and patterned to encapsulate the first passivation oxide layer, while physically exposing a center portion of each anode contact to electrically connect the anode contacts.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: April 30, 2019
    Assignee: REDLEN TECHNOLOGIES, INC.
    Inventors: Uri El-Hanany, Adam Densmore, Saeid Taherion, Georgios Prekas, Veeramani Perumal
  • Patent number: 10222487
    Abstract: The objective of the present invention is to effectively improve an image lag phenomenon of a direct conversion detector. The present invention provides an X-ray detector comprising: a lower electrode, formed on a substrate, to which a first driving voltage V1 is applied; an auxiliary electrode, around the lower electrode, to which a third driving voltage V3 is applied; a photoconductive layer formed on the lower electrode and the auxiliary electrode; and an upper electrode, formed on the photoconductive layer, to which a second driving voltage V2 is applied, wherein the third driving voltage V3, right after the radiation of the X-rays is off, is a reverse bias voltage.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: March 5, 2019
    Assignees: Rayence Co., Ltd., VATECH EWOO Holdings Co., Ltd., Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Dong Jin Lee, Tae Woo Kim, Seong Il Im, Pyo Jin Jeon
  • Patent number: 10153321
    Abstract: The present invention is directed towards a moisture resistant radiation detector core assembly which was constructed by first assembling the photon-electron conversion layer, integrated circuit and the connection elements between and then encapsulating the whole assembly. This provides improved moisture barrier properties, since the encapsulation also covers the connection elements and does not have to be opened to apply the electrical connections, as is done for known radiation detector core assemblies.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: December 11, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Frank Verbakel, Peter Van Delft
  • Patent number: 9847369
    Abstract: A method of fabricating a solid state radiation detector method includes mechanically lapping and polishing the first and the second surfaces of a semiconductor wafer using a plurality of lapping and polishing steps. The method also includes growing passivation oxide layers by use of oxygen plasma on the top of the polished first and second surfaces in order to passivate the semiconductor wafer. Anode contacts are deposited and patterned on top of the first passivation oxide layer, which is on top of the first surface. Cathode contacts, which are either monolithic or patterned, are deposited on top of the second passivation oxide layer, which is on the second surface. Aluminum nitride encapsulation layer can be deposited over the anode contacts and patterned to encapsulate the first passivation oxide layer, while physically exposing a center portion of each anode contact to electrically connect the anode contacts.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: December 19, 2017
    Assignee: REDLEN TECHNOLOGIES, INC.
    Inventors: Uri El-Hanany, Adam Densmore, Saeid Taherion, Georgios Prekas, Veeramani Perumal
  • Patent number: 9826182
    Abstract: Techniques for controlling a stability of response of a semi-conductor matrix imager composed of pixels, including a first phase of characterizing the stability of the pixels and a second phase of correcting the signals arising from the pixels during the measurements. The pixels are classed into stable pixels and unstable pixels according to a predetermined criterion, the unstable pixels being associated individually with a stable pixel whose characteristics serve as base for correcting signals arising from the unstable pixels.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: November 21, 2017
    Assignee: COMMISARIAT A L'ENERGIE ATOMIQUE ET AUX ENEGIES ALTERNATIVES
    Inventors: Francis Glasser, Loïck Verger
  • Patent number: 9318627
    Abstract: A semiconductor radiation detector having a semiconductor substrate and first and second metal layers. The semiconductor substrate has substantially planar upper and lower opposing surfaces which have respective first and second surface areas. The first and second surface areas are defined by prospective dice lines. The first metal layer is on the substantially planar upper surface such that the first metal layer will have a surface area less than the first surface area of the substantially planar upper surface as defined by spaces on the substantially planar upper surface between the first metal layer and the prospective dice lines which define the first surface area. The second metal layer is on the substantially planar lower opposing surface.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: April 19, 2016
    Assignee: eV Products, Inc.
    Inventors: Handong Li, Michael Prokesch, John F. Eger
  • Patent number: 9287433
    Abstract: A radiation detector is provided. The radiation detection comprises a semiconductor crystal for detecting radiation. The semiconductor crystal comprises a top surface, a bottom surface, and at least one side surface. At least one anode is arranged on at least one of the top surface, the bottom surface, and the at least one side surface. At least one cathode is arranged on at least another one of the top surface, the bottom surface, and the at least one side surface. The at least one anode each has a stripe shape, the at least one cathode each has a planar or curved shape, and the at least one cathode and the at least one anode extend in parallel with respect to each other to a length substantially equal to that of the anode. Such an electrode structure can improve energy resolution and detection efficiency of the radiation detector effectively.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: March 15, 2016
    Assignees: Tsinghua University, Nuctech Company Limited
    Inventors: Lan Zhang, Yulan Li, Yuanjing Li, Yinong Liu, Jianqiang Fu, Hao Jiang, Wei Zhang, Yanqing Liu, Jun Li
  • Patent number: 9287439
    Abstract: The invention relates to a method for conditioning the CdTe layer of CdTe thin-film solar cells without the use of CdCl2. Calcium tetrachlorozincate (CaZnCl4) is to be used instead of CdCl2 for activation, and the process parameters that have proven themselves over time are to be kept. The method involves the activation of the CdTe layer of semi-finished thin-film CdTe solar cells; calcium tetrachlorozincate is applied to the CdTe layer (4) and the semi-finished thin-film CdTe solar cell subsequently undergoes a heat treatment. The calcium tetrachlorozincate layer is preferably applied via methods from the prior art, for instance roller coating with an aqueous or methanolic salt solution, spraying on an aqueous or methanolic salt solution, an aerosol coating or a dipping bath.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: March 15, 2016
    Assignee: China Triumph International Engineering Co., Ltd.
    Inventors: Christian Drost, Bastian Siepchen, Shou Peng
  • Patent number: 9255995
    Abstract: According to one embodiment, a scintillator radiation detector system includes a scintillator, and a processing device for processing pulse traces corresponding to light pulses from the scintillator, where the processing device is configured to: process each pulse trace over at least two temporal windows and to use pulse digitization to improve energy resolution of the system. According to another embodiment, a scintillator radiation detector system includes a processing device configured to: fit digitized scintillation waveforms to an algorithm, perform a direct integration of fit parameters, process multiple integration windows for each digitized scintillation waveform to determine a correction factor, and apply the correction factor to each digitized scintillation waveform.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: February 9, 2016
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Nerine Jane Cherepy, Stephen Anthony Payne, Owen B. Drury, Benjamin W. Sturm
  • Patent number: 9202961
    Abstract: A radiation detector includes a semiconductor substrate having opposing front and rear surfaces, a cathode electrode located on the front surface of the semiconductor substrate configured so as to receive radiation, and a plurality of anode electrodes formed on the rear surface of said semiconductor substrate. A work function of the cathode electrode material contacting the front surface of the semiconductor substrate is lower than a work function of the anode electrode material contacting the rear surface of the semiconductor substrate.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: December 1, 2015
    Assignee: REDLEN TECHNOLOGIES
    Inventors: Henry Chen, Salah Awadalla, Pinghe Lu, Pramodha Marthandam
  • Patent number: 9134439
    Abstract: A radiation detector system that effectively solves the electron trapping problem by optimizing shielding of individual virtual Frisch-grid detectors in an array configuration with a common cathode.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: September 15, 2015
    Assignee: Brookhaven Science Associates, LLC
    Inventors: Aleksey Bolotnikov, Ralph B. James, Gianluigi De Geronimo, Emerson Vernon
  • Patent number: 9121953
    Abstract: A radiation detector system that solves the electron trapping problem by optimizing shielding of the individual virtual Frisch-grid detectors in an array configuration with a common cathode.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: September 1, 2015
    Assignee: Brookhaven Science Associates, LLC
    Inventors: Aleksey E. Bolotnikov, Ge Yang, Giuseppe Camarda, Yonggang Cui, Anwar Hossain, Ki Hyun Kim, Ralph B. James
  • Patent number: 9057684
    Abstract: A system for imaging a gamma source includes a pixelated Compton scattering layer, for Compton scattering of gamma photons emitted by the gamma source, and a non-pixelated full-energy detector for detecting at least a portion of Compton scattered gamma photons geometrically encoded by a coded aperture positioned between the pixelated Compton scattering layer and the full-energy detector at a distance from the pixelated Compton scattering layer. A method for imaging a gamma source includes (a) detecting coincidence events, each including Compton scattering in a pixelated Compton scattering layer, and transmission to a non-pixelated full-energy detector of a Compton scattered gamma photon transmitted through a coded aperture located at a distance from the pixelated Compton scattering layer, and (b) determining an image of the gamma source from the detection of the coincidence events.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: June 16, 2015
    Assignee: The Arizona Board Of Regents On Behalf Of The University Of Arizona
    Inventors: John G. Williams, Aaron M. Farber
  • Patent number: 9000389
    Abstract: Radiation detectors and methods of fabricating radiation detectors are provided. One method includes mechanically polishing at least a first surface of a semiconductor wafer using a polishing sequence including a plurality of polishing steps. The method also includes growing a passivation oxide layer on a top of the polished first surface and depositing patterned metal contacts on a top of the passivation oxide layer. The method further includes applying a protecting layer on the patterned deposited metal contacts, etching a second surface of the semiconductor and applying a monolithic cathode electrode on the etched second surface of the semiconductor. The method additionally includes removing the protecting layer from the patterned metal contacts on the first surface, wherein the patterned metal contacts are formed from one of (i) reactive metals and (ii) stiff-rigid metals for producing inter-band energy-levels in the passivation oxide layer.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: April 7, 2015
    Assignee: General Electric Company
    Inventors: Peter Rusian, Arie Shahar
  • Patent number: 8963096
    Abstract: Example embodiments are directed an X-ray detector including an oxide semiconductor transistor. The X-ray detector including the oxide semiconductor transistor includes an oxide semiconductor transistor and a signal storage capacitor in parallel to each other on a substrate. The oxide semiconductor transistor includes a channel formed of an oxide semiconductor material, and a photoconductor. A pixel electrode and a common electrode are formed on opposite surfaces of the photoconductor. The channel includes ZnO, or a compound including ZnO and at least one selected from a group consisting of gallium (Ga), indium (In), hafnium (Hf), and tin (Sn).
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: February 24, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sun-il Kim, Jae-chul Park, Sang-wook Kim, Chang-jung Kim
  • Patent number: 8941073
    Abstract: A radiological image detection apparatus includes a scintillator, a pixel array, a first support and a case. The scintillator is formed of phosphor which emits fluorescence when exposed to radiation. The pixel array is provided in close contact with the scintillator and detects the fluorescence emitted from the scintillator. The first support supports at least one of the scintillator and the pixel array. The case includes a plurality of members having a first member provided with a ceiling plate part through which light penetrates. The case houses the scintillator, the pixel array and the support in a lightproof inner space formed by combining the plurality of members. The scintillator and the pixel array are disposed between the first support and the ceiling plate part. The first support absorbs light of a wavelength region corresponding to a part of a wavelength region which is sensed by the pixel array.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: January 27, 2015
    Assignee: Fujifilm Corporation
    Inventors: Toshiyuki Nabeta, Haruyasu Nakatsugawa
  • Patent number: 8901502
    Abstract: A device (1) is provided for determining at least one parameter of a medium which has a sensor device (2) and an electronic device (3). To provide such a device with a cooling system for at least a portion of its components, the sensor device (2) and/or the electronic device (3) are arranged at least partly in at least one inner space (4, 5) of a housing (6). A passage (7) borders the inner space (4, 5) and a cooling chamber (8) through which a cooling medium can flow is arranged in proximity of the passage (7).
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: December 2, 2014
    Assignee: KROHNE Optosens GmbH
    Inventors: Gert Sinn, Thomas Fritsch
  • Publication number: 20140341333
    Abstract: A detector includes a photon-counting detector (PCD) layer and a cathode layer arranged adjacent to the PCD layer. The detector further includes a plurality of pixilated anodes arranged adjacent to the photon-counting detecting layer on a side opposite to the cathode layer. The detector also includes a plurality of collimator segments arranged above the cathode layer so as to block a portion of X-ray photons emitted from an X-ray source from reaching the anodes, where each collimator segment is arranged above a portion of at least one anode.
    Type: Application
    Filed: May 17, 2013
    Publication date: November 20, 2014
    Applicants: Toshiba Medical Systems Corporation, Kabushiki Kaisha Toshiba
    Inventors: Xiaolan WANG, Yuexing Zhang, Yu Zou, Miesher L. Rodrigues
  • Publication number: 20140332691
    Abstract: The present invention relates to a pixel detector (10), comprising a semiconductor sensor layer (12), in which charges can be generated upon interaction with particles to be detected. The semiconductor layer defines an X-Y-plane and has a thickness extending in Z-direction. The detector further comprises a read-out electronics layer (14) connected to said semiconductor layer (12), said read-out electronics layer (14) comprising an array of read-out circuits (20) for detecting signals indicative of charges generated in a corresponding volume of said semiconductor sensor layer (12). The neighbouring read-out circuits (20) are connected by a relative timing circuit configured to determine time difference information between signals detected at said neighbouring read-out circuits (20).
    Type: Application
    Filed: September 21, 2011
    Publication date: November 13, 2014
    Applicants: CERN - EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH, Friedrich-Alexander-Universitat Erlangen-Numberg, Czech Technical University in Prague Institute of Experimental and Applied Physics
    Inventors: Michael Campbell, Thilo Michel, Jan Jakubek
  • Patent number: 8884228
    Abstract: An apparatus and process is provided to illustrate the manipulation of the internal electric field of CZT using multiple wavelength light illumination on the crystal surface at RT. The control of the internal electric field is shown through the polarization in the IR transmission image under illumination as a result of the Pockels effect.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: November 11, 2014
    Assignees: Savannah River Nuclear Solutions, LLC, Fisk University
    Inventors: Aaron L. Washington, II, Martine C. Duff, Lucile C. Teague, Arnold Burger, Michael Groza
  • Patent number: 8847386
    Abstract: An electrical contact for a detector, the electrical component, comprising a cadmium tellurium component, a first layer formed onto the cadmium tellurium component, wherein the first layer comprises indium and a contact agent being bonded directly or indirectly to the first layer to be in electrical contact with the first layer. The contact agent may be a stud bump or a conductive adhesive interconnect being bonded indirectly to the first layer via noble metal shielding layer.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: September 30, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Nicolaas Johannes Anthonius Van Veen, Rob Van Asselt, Gerard Kums
  • Publication number: 20140246598
    Abstract: The present invention provides a radiation detection system for detecting X-ray and gamma rays featuring Cd1-xMgx Te in solid solution as a crystal semiconductor and electrical connection means. The crystal has a composition in the range of Cd0.99Mg0.01Te to Cd0.71Mg0.29Te and may be doped with indium or another Group III element, which may be suitable for use at room temperature as well as controlled temperatures. The present invention further provides a method for detecting X- or gamma ray radiation by (a) providing a solid solution Cd1-xMgxTe crystal in the composition range of Cd0.99Mg0.01Te to Cd0.71Mg0.29Te; (b) providing an electrical contact means for connecting the Cd1-xMgxTe crystal to an amplification, measurement, identification or imaging means; and (c) detecting the presence of the X- or gamma ray radiation.
    Type: Application
    Filed: April 5, 2012
    Publication date: September 4, 2014
    Inventors: Robert D. Herpst, Vladimir Yakimovich
  • Publication number: 20140217297
    Abstract: A radiation detector system is disclosed that effectively solves the electron trapping problem by optimizing shielding of the individual virtual Frisch-grid detectors in an array configuration.
    Type: Application
    Filed: October 29, 2013
    Publication date: August 7, 2014
    Applicant: Brookhaven Science Associates, LLC
    Inventors: Aleksey Bolotnikov, Ralph B. James, Gianluigi De Geronimo, Emerson Vernon
  • Publication number: 20140209809
    Abstract: The present disclosure provides a radiation detector, comprising: a semiconductor crystal for detecting radiation, the semiconductor crystal comprising a top surface, a bottom surface, and at least one side surface; at least one anode arranged on at least one of the top surface, the bottom surface, and the at least one side surface; and at least one cathode arranged on at least another one of the top surface, the bottom surface, and the at least one side surface, wherein the at least one anode each has a stripe shape, the at least one cathode each has a planar or curved shape, and the at least one cathode and the at least one anode extend in parallel with respect to each other to a length substantially equal to that of the anode. Such an electrode structure can improve energy resolution and detection efficiency of the radiation detector effectively.
    Type: Application
    Filed: January 27, 2014
    Publication date: July 31, 2014
    Inventors: Lan Zhang, Yulan Li, Yuangjing Li, Yinong Liu, Jianqiang Fu, Hao Jiang, Wei Zhang, Yanqing Liu, Jun Liu
  • Publication number: 20140070109
    Abstract: A detector array (110) includes a detector (112) configured to detect ionizing radiation and output a signal indicative of the detected radiation, wherein the detector at least includes a semiconductor element (118) and an illumination subsystem (120) configured to generate and transfer sub-band-gap illuminating radiation to selectively illuminate only a sub-portion of the semiconductor element in order to produce a spatially patterned illumination distribution inside the element.
    Type: Application
    Filed: April 6, 2012
    Publication date: March 13, 2014
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Alexander Schwarzman, Naor Wainer, Amir Livne
  • Patent number: 8653469
    Abstract: A probe for detecting K-alpha photon emissions. A housing has an aperture at an end. A detector crystal is situated within the housing adjacent to the housing aperture. An energy conversion device is situated within the housing between the detector crystal and the aperture. The energy conversion device is made from a predetermined material configured to convert energy directed through the housing aperture from a source of primary photon emission radiation to a corresponding secondary K-alpha emission within a predetermined emission energy acceptance window. A power supply is coupled to the detector crystal and is configured to establish a polarized electrical field between the anode and the cathode of the detector crystal. The detector crystal receives the K-alpha emission and generates an electrical signal representative of the amount of target emissions received through the housing aperture.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: February 18, 2014
    Assignee: Devicor Medical Products, Inc.
    Inventor: John D. Call
  • Patent number: 8614423
    Abstract: A radiation detector includes a semiconductor substrate having opposing front and rear surfaces, a cathode electrode located on the front surface of the semiconductor substrate configured so as to receive radiation, and a plurality of anode electrodes formed on the rear surface of said semiconductor substrate. A work function of the cathode electrode material contacting the front surface of the semiconductor substrate is lower than a work function of the anode electrode material contacting the rear surface of the semiconductor substrate.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: December 24, 2013
    Assignee: Redlen Technologies, Inc.
    Inventors: Henry Chen, Salah Awadalla, Pinghe Lu, Pramodha Marthandam
  • Patent number: 8586936
    Abstract: The present invention relates to a novel hybrid anode configuration for a radiation detector that effectively reduces the edge effect of surface defects on the internal electric field in compound semiconductor detectors by focusing the internal electric field of the detector and redirecting drifting carriers away from the side surfaces of the semiconductor toward the collection electrode(s).
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: November 19, 2013
    Assignee: Brookhaven Science Associates, LLC
    Inventors: Ge Yang, Aleksey E. Bolotnikov, Giuseppe Camarda, Yonggang Cui, Anwar Hossain, Ki Hyun Kim, Ralph B. James
  • Publication number: 20130278716
    Abstract: A 3D ultraviolet (UV) imaging LADAR system includes a UV source configured to generate a UV interrogation beam, a sensor configured to receive a UV return beam reflected from a target and to produce an electrical signal, and an imaging module coupled to the sensor and configured to receive the electrical signal and to generate a corresponding 3D image of the target. In one example, the sensor includes a down-shifting device configured to down-shift the UV return beam to a down-shifted light beam of a different wavelength, for example, in the visible or SWIR wavelength ranges.
    Type: Application
    Filed: April 18, 2012
    Publication date: October 24, 2013
    Applicant: RAYTHEON COMPANY
    Inventors: Adam M. Kennedy, Michael D. Jack, James Asbrock, Frank B. Jaworski
  • Patent number: 8563940
    Abstract: According to a radiation detector manufacturing method, a radiation detector and a radiographic apparatus of this invention, Cl-doped CdZnTe is employed for a conversion layer, with Cl concentration set to 1 ppm wt to 3 ppm wt inclusive, and Zn concentration set to 1 mol % to 5 mol % inclusive. This can form the conversion layer optimal for the radiation detector. Consequently, the radiation detector manufacturing method, the radiation detector and the radiographic apparatus can be provided which can protect the defect level of crystal grain boundaries by Cl doping in a proper concentration, and can further maintain integral sensitivity to radiation, while reducing leakage current, by Zn doping in a proper concentration.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: October 22, 2013
    Assignees: Shimadzu Corporation, Institute of National Colleges of Technology, Japan
    Inventors: Satoshi Tokuda, Tamotsu Okamoto, Hiroyuki Kishihara, Masatomo Kaino, Toshinori Yoshimuta, Koichi Tanabe
  • Publication number: 20130266114
    Abstract: A radiation detector includes a semiconductor substrate having opposing front and rear surfaces, a cathode electrode located on the front surface of the semiconductor substrate configured so as to receive radiation, and a plurality of anode electrodes formed on the rear surface of said semiconductor substrate. A work function of the cathode electrode material contacting the front surface of the semiconductor substrate is lower than a work function of the anode electrode material contacting the rear surface of the semiconductor substrate.
    Type: Application
    Filed: June 5, 2013
    Publication date: October 10, 2013
    Inventors: Henry CHEN, Salah AWADALLA, Pinghe LU, Pramodha MARTHANDAM
  • Patent number: 8530850
    Abstract: A calibrated real-time, high energy X-ray imaging system is disclosed which incorporates a direct radiation conversion, X-ray imaging camera and a high speed image processing module. The high energy imaging camera utilizes a Cd—Te or a Cd—Zn—Te direct conversion detector substrate. The image processor includes a software driven calibration module that uses an algorithm to analyze time dependent raw digital pixel data to provide a time related series of correction factors for each pixel in an image frame. Additionally, the image processor includes a high speed image frame processing module capable of generating image frames at frame readout rates of greater than ten frames per second to over 100 frames per second. The image processor can provide normalized image frames in real-time or can accumulate static frame data for substantially very long periods of time without the typical concomitant degradation of the signal-to-noise ratio.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: September 10, 2013
    Assignee: Oy AJAT Ltd
    Inventors: Konstantinos Spartiotis, Tuomas Pantsar
  • Patent number: 8519347
    Abstract: Compounds, methods and devices for detecting incident radiation, such as incident x-rays or gamma-rays, are provided. The detection of incident radiation can be accomplished by employing inorganic compounds that include elements with high atomic numbers, that have band gaps of at least about 1.5 eV, and that have an electrical resistivity of at least 106 ?cm as photoelectric materials in a radiation detector. The compounds include inorganic compounds comprising at least one element from periods five or six of the Periodic Table of the Elements.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: August 27, 2013
    Assignee: Northwestern University
    Inventors: Mercouri G. Kanatzidis, Ioannis Androulakis, Simon Johnsen, Sebastian C. Peter
  • Publication number: 20130214170
    Abstract: One or more techniques and/or systems described herein implement, among other things, a flat panel detector component for detecting actinic and non-actinic radiation, or the formation thereof. The flat panel detector component comprises a plurality of layers, where at least one of the layers comprises silk. Further, a silk layer may be in direct physical contact with a radiation detection layer.
    Type: Application
    Filed: October 28, 2010
    Publication date: August 22, 2013
    Inventor: Sorin Marcovici
  • Publication number: 20130193336
    Abstract: An apparatus and process is provided to illustrate the manipulation of the internal electric field of CZT using multiple wavelength light illumination on the crystal surface at RT. The control of the internal electric field is shown through the polarization in the IR transmission image under illumination as a result of the Pockels effect.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 1, 2013
    Applicants: Fisk University, Savannah River Nuclear Solutions, LLC
    Inventors: Aaron L. Washington, II, Martine C. Duff, Lucile C. Teague, Arnold Burger, Michael Groza
  • Publication number: 20130161523
    Abstract: A radiation detector is provided employing a focus grid electrode. The focus grid electrode is biased relative to one or more anode electrodes. In this manner, movement of electrons to the anode electrodes may be enhanced, such as due to a higher electrical field strength in a conversion material and/or due to focusing of the resulting electrical field on the anode electrodes.
    Type: Application
    Filed: December 23, 2011
    Publication date: June 27, 2013
    Applicant: General Electric Company
    Inventors: John Eric Tkaczyk, Vladimir A. Lobastov, Yanfeng Du
  • Publication number: 20130126746
    Abstract: A novel radiation detector system is disclosed that solves the electron trapping problem by optimizing shielding of the individual virtual Frisch-grid detectors in an array configuration.
    Type: Application
    Filed: May 2, 2011
    Publication date: May 23, 2013
    Applicant: BROOKHAVEN SCIENCE ASSOCIATES, LLC
    Inventors: Aleksey E. Bolotnikov, Ge Yang, Giuseppe Camarda, Yonggang Cui, Anwar Hossain, Ki Hyun Kim, Ralph B. James
  • Publication number: 20130108019
    Abstract: Detector modules for an imaging system and methods of manufacturing are provided. One detector module includes a substrate, a direct conversion sensor material coupled to the substrate and a flexible interconnect electrically coupled to the direct conversion sensor material and configured to provide readout of electrical signals generated by the direct conversion sensor material. The detector module also includes at least one illumination source for illuminating the direct conversion sensor material.
    Type: Application
    Filed: October 27, 2011
    Publication date: May 2, 2013
    Applicant: General Electric Company
    Inventors: John Eric Tkaczyk, Kevin Matthew Durocher, James Rose, Haochuan Jiang, Abdelaziz Ikhlef, Vladimir Lobastov, Daniel David Harrison
  • Publication number: 20130092843
    Abstract: A smart device “plug-in” radiation module(s) and/or methods are described wherein the bulk of non-sensor radiation circuitry is off-loaded to the smart device. By attaching the radiation module to the smart device via a power/communication port (for example, the smart device's headphone/microphone jack) robust attachment can be achieved as well as uniformity of attachment across different smart devices. A very small radiation module form factor is obtainable, not to mention a very significant cost reduction, allowing widespread adoption of radiation detectors as well as radiation geo-mapping. Power for the radiation module can be obtained from the smart device's headphone plug, utilizing the audio out (speaker) signal's power. Similarly, input to the smart device can be facilitated via the audio in (microphone) signal. Further, output of the radiation module can be visualized on the smart device, as well as control functions.
    Type: Application
    Filed: January 23, 2012
    Publication date: April 18, 2013
    Inventors: Marcos de Azambuja Turqueti, Guilherme Cardoso
  • Publication number: 20130060134
    Abstract: A tumor treatment apparatus may include an array of collimated CZT detectors configured to intersect a known coordinate and measure gamma radiation activity, for example at 511 keV. A radiation delivery system may be configured to direct radiation through the known coordinate on the basis of the gamma radiation activity. A translatable and rotatable table may be configured to support a tumor host, wherein the tumor is positionable relative to the known coordinate on the basis of the gamma radiation activity emitted by the tumor and measured by the array of collimated CZT detectors. Radiation from the radiation delivery system may be delivered to the tumor at the known coordinate, and may be delivered in an intra-operative surgical environment.
    Type: Application
    Filed: September 7, 2012
    Publication date: March 7, 2013
    Applicant: CARDINAL HEALTH 414, LLC
    Inventors: Dennis ESHIMA, Mehmet HUSNU, Jim STONE
  • Publication number: 20130051529
    Abstract: A method and system for facilitating the identification and/or authentication of objects, and to a method and system for the marking of objects with an identity and/or as of authentic origin, and a set of objects marked to facilitate subsequent identification and/or authentication are described. The marking comprises incorporating into an object or part thereof or onto a tag mechanically engaged therewith a marker material exhibiting a characteristic radiation interaction response to incident high-energy ionizing radiation from a test source that is known to vary spectroscopically across the spectrum of the source. The presence or otherwise of the marker material may be determined by subsequent interrogation of an object with a suitable radiation source and detector to infer whether an object is of marked identity or origin.
    Type: Application
    Filed: March 11, 2011
    Publication date: February 28, 2013
    Inventors: Arnab Basu, Ian Radley, Max Robinson
  • Patent number: 8368029
    Abstract: A multi-modality imaging system for imaging of an object under study, e.g., a whole body or parts of the body of animals such as humans, other primates, swine, dogs, or rodents, that includes a magnetic resonance imaging apparatus and a cadmium zinc telluride (CZT)-family semiconductor, single-photon imaging apparatus within a magnetic field produced by the magnetic resonance imaging apparatus such that sequential or simultaneous imaging can be done with the two modalities using the same support bed of the object under study in the same, uninterrupted imaging session.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: February 5, 2013
    Assignee: Gamma Medica-Ideas, Inc.
    Inventors: Douglas J. Wagenaar, Bradley E. Patt
  • Publication number: 20130026380
    Abstract: Radiations detectors with angled walls and methods of fabrication are provided. One radiation detector module includes a plurality of sensor tiles configured to detect radiation. The plurality of sensor tiles have (i) top and bottom edges defining top and bottom surfaces of the plurality of sensor tiles, (ii) sidewall edges defining sides of the plurality of sensor tiles, and (iii) corners defined by the top and bottom edges and the sidewall edges. The radiation detector module also has at least one beveled surface having an oblique angle, wherein the beveled surface includes beveling of at least one of top or bottom edges, the side wall edges, or the corners.
    Type: Application
    Filed: July 26, 2011
    Publication date: January 31, 2013
    Applicant: General Electric Company
    Inventors: John Eric Tkaczyk, Steven Robert Hayashi, Haochuan Jiang, Wenwu Zhang, Kristian William Andreini, Nitin Garg, Tan Zhang
  • Publication number: 20130015361
    Abstract: A gamma ray detector includes a gamma ray detecting rod elongated along a longitudinal axis, wherein gamma ray detection is enhanced along the longitudinal axis, and a gamma ray shield encapsulating the rod, the shield having an aperture at an end of the detecting rod along the longitudinal axis to admit gamma rays substantially parallel to the longitudinal axis of the elongated detecting rod, wherein gamma ray detection is enhanced along the longitudinal axis and aperture to substantially collimate the sensitivity of the gamma ray detector along the combined aperture and longitudinal axis of the detecting rod.
    Type: Application
    Filed: July 16, 2012
    Publication date: January 17, 2013
    Applicant: CARDINAL HEALTH 414, LLC
    Inventor: Chad E. BOUTON
  • Patent number: 8344331
    Abstract: A probe for detecting K-alpha photon emissions. A housing has an aperture at an end. A detector crystal is situated within the housing adjacent to the housing aperture. An energy conversion device is situated within the housing between the detector crystal and the aperture. The energy conversion device is made from a predetermined material configured to convert energy directed through the housing aperture from a source of primary photon emission radiation to a corresponding secondary K-alpha emission within a predetermined emission energy acceptance window. A power supply is coupled to the detector crystal and is configured to establish a polarized electrical field between the anode and the cathode of the detector crystal. The detector crystal receives the K-alpha emission and generates an electrical signal representative of the amount of target emissions received through the housing aperture.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: January 1, 2013
    Assignee: Devicor Medical Products, Inc.
    Inventor: John D. Call
  • Publication number: 20120318995
    Abstract: A stacked crystal array includes a plurality of crystal slices and a plurality of interconnects. The interconnects have electrically conductive, spaced-apart and generally parallel elements joined by electrically conductive spacers extending generally orthogonally therebetween, the spacers being rotationally offset from each other by a predetermined angle. The array further includes a plurality of electrical insulators and an electrically insulative housing having a plurality of slots. The crystal slices, insulators and interconnects are arranged in the housing to form an assembly wherein the crystal slices are coupled together in a parallel electrical circuit. The assembly provides photon absorption comparable to a monolithic crystal having a thickness generally equivalent to the sum of the thicknesses of the crystal slices, but at a lower bias voltage.
    Type: Application
    Filed: August 20, 2012
    Publication date: December 20, 2012
    Applicant: DEVICOR MEDICAL PRODUCTS, INC.
    Inventor: John D. Call
  • Patent number: 8314395
    Abstract: A radiation detector includes a semiconductor crystal having a first surface and a second surface opposite to the first surface, a first electrode electrically coupled with the first surface of the semiconductor crystal to allow current to flow between the first electrode and the crystal, and an insulating layer on the first surface and between the semiconductor crystal and the first electrode so as to create a partially transmissive electrical barrier between the first electrode and the crystal. The insulating layer has a thickness ranging from about 50 nanometers to about 500 nanometers.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: November 20, 2012
    Assignee: General Electric Company
    Inventors: Minglong Zhang, Yanfeng Du, John Eric Tkaczyk, Zhaoping Wu, Ira Blevis
  • Patent number: 8304739
    Abstract: A radiation-sensitive detector includes a first substrate 202 with first and second opposing sides. The first side detects incident radiation, and the first substrate 202 produces a signal indicative of the detected radiation. At least one electrical contact 204 is located on the first substrate 202. An electrically conductive material 214 is coupled to the at least one electrical contact 204. The electrically conductive material 214 has a melting point in a range of about seventy-two (72) degrees Celsius to about ninety-five (95) degrees Celsius.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: November 6, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Nicolaas Johannes Anthonius Van Veen, Rob Van Asselt
  • Patent number: 8269185
    Abstract: A stacked crystal array includes a plurality of crystal slices and a plurality of interconnects. The interconnects have electrically conductive, spaced-apart and generally parallel elements joined by electrically conductive spacers extending generally orthogonally therebetween, the spacers being rotationally offset from each other by a predetermined angle. The array further includes a plurality of electrical insulators and an electrically insulative housing having a plurality of slots. The crystal slices, insulators and interconnects are arranged in the housing to form an assembly wherein the crystal slices are coupled together in a parallel electrical circuit. The assembly provides photon absorption comparable to a monolithic crystal having a thickness generally equivalent to the sum of the thicknesses of the crystal slices, but at a lower bias voltage.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: September 18, 2012
    Assignee: Devicor Medical Products, Inc.
    Inventor: John D. Call
  • Patent number: 8258482
    Abstract: In one embodiment, a system comprises a semiconductor gamma detector material and a hole blocking layer adjacent the gamma detector material, the hole blocking layer resisting passage of holes therethrough. In another embodiment, a system comprises a semiconductor gamma detector material, and an electron blocking layer adjacent the gamma detector material, the electron blocking layer resisting passage of electrons therethrough, wherein the electron blocking layer comprises undoped HgCdTe. In another embodiment, a method comprises forming a hole blocking layer adjacent a semiconductor gamma detector material, the hole blocking layer resisting passage of holes therethrough. Additional systems and methods are also presented.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: September 4, 2012
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Rebecca J. Nikolic, Adam M. Conway, Art J. Nelson, Stephen A. Payne