WO1995018390A1 - Low noise solid state fluorscopic radiation imager - Google Patents

Low noise solid state fluorscopic radiation imager Download PDF

Info

Publication number
WO1995018390A1
WO1995018390A1 PCT/US1994/014531 US9414531W WO9518390A1 WO 1995018390 A1 WO1995018390 A1 WO 1995018390A1 US 9414531 W US9414531 W US 9414531W WO 9518390 A1 WO9518390 A1 WO 9518390A1
Authority
WO
WIPO (PCT)
Prior art keywords
tft
array
low noise
silicon region
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1994/014531
Other languages
French (fr)
Inventor
Jack Dean Kingsley
George Edward Possin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to DE69417407T priority Critical patent/DE69417407T2/en
Priority to EP95905976A priority patent/EP0686268B1/en
Priority to JP51809695A priority patent/JP4002601B2/en
Publication of WO1995018390A1 publication Critical patent/WO1995018390A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
    • G01T1/2914—Measurement of spatial distribution of radiation
    • G01T1/2921—Static instruments for imaging the distribution of radioactivity in one or two dimensions; Radio-isotope cameras
    • G01T1/2928—Static instruments for imaging the distribution of radioactivity in one or two dimensions; Radio-isotope cameras using solid state detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/20—Measuring radiation intensity with scintillation detectors
    • G01T1/2018—Scintillation-photodiode combinations
    • G01T1/20184—Detector read-out circuitry, e.g. for clearing of traps, compensating for traps or compensating for direct hits

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Solid State Image Pick-Up Elements (AREA)
  • Thin Film Transistor (AREA)

Abstract

A low noise fluoroscopic radiation imager includes a large area photosensor array having a plurality of photosensors arranged in a pattern so as to have a predetermined pitch, and a low noise addressable thin film transistor (TFT) array electrically coupled to the photosensors. The TFT array includes a plurality of low charge retention TFTs, each of which have a switched silicon region that has an area in microns not greater than the value of the pitch of the imager array expressed in microns. The portion of the switched silicon region underlying the source and drain electrodes of the TFT is not greater than about 150 % of the portion of the switched silicon region in the channel area of the TFT. The ratio of the TFT channel length (distance between the source and drain electrodes across the channel) to the channel width is less than 20:1, and commonly less than 10:1, with the channel length in the range of between about 1 νm and 4 νm. The photosensor array also includes crossover regions between address lines that have substantially no silicon therebetween so that no switched silicon region exists at the crossovers.
PCT/US1994/014531 1993-12-29 1994-12-15 Low noise solid state fluorscopic radiation imager Ceased WO1995018390A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69417407T DE69417407T2 (en) 1993-12-29 1994-12-15 LOW NOISE FLUOROSCOPIC SOLID IMAGING DEVICE FOR RADIATION
EP95905976A EP0686268B1 (en) 1993-12-29 1994-12-15 Low noise solid state fluorscopic radiation imager
JP51809695A JP4002601B2 (en) 1993-12-29 1994-12-15 Solid fluoroscopic radiation imaging apparatus and solid fluoroscopic X-ray imaging apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/174,921 US5587591A (en) 1993-12-29 1993-12-29 Solid state fluoroscopic radiation imager with thin film transistor addressable array
US08/174,921 1993-12-29

Publications (1)

Publication Number Publication Date
WO1995018390A1 true WO1995018390A1 (en) 1995-07-06

Family

ID=22638073

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/014531 Ceased WO1995018390A1 (en) 1993-12-29 1994-12-15 Low noise solid state fluorscopic radiation imager

Country Status (5)

Country Link
US (1) US5587591A (en)
EP (1) EP0686268B1 (en)
JP (1) JP4002601B2 (en)
DE (1) DE69417407T2 (en)
WO (1) WO1995018390A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19827020A1 (en) * 1998-06-17 1999-12-30 Siemens Ag Image detectors e.g. for scanning documents
WO2000057205A1 (en) * 1999-03-23 2000-09-28 Commissariat A L'energie Atomique X-ray imaging device and method for making same
US6239439B1 (en) 1997-11-28 2001-05-29 Canon Kabushiki Kaisha Radiation detecting device and radiation detecting method

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19714689A1 (en) * 1997-04-09 1998-10-15 Siemens Ag X-ray detector
GB9726094D0 (en) * 1997-12-10 1998-02-11 Philips Electronics Nv Thin film transistors and electronic devices comprising such
JP2000131444A (en) * 1998-10-28 2000-05-12 Canon Inc Radiation detection device, radiation detection system, and method of manufacturing radiation detection device
US6373062B1 (en) * 1999-06-30 2002-04-16 Siemens Medical Solutions Usa, Inc. Interdigital photodetector for indirect x-ray detection in a radiography imaging system
US6396253B1 (en) 1999-11-19 2002-05-28 General Electric Company Methods and apparatus for automated repair detection of solid-state X-ray detectors
US6404851B1 (en) 2000-03-30 2002-06-11 General Electric Company Method and apparatus for automatic exposure control using localized capacitive coupling in a matrix-addressed imaging panel
KR100379684B1 (en) * 2001-04-20 2003-04-10 엘지.필립스 엘시디 주식회사 Manufacturing method for tft lcd
US6940142B2 (en) * 2001-07-02 2005-09-06 Xerox Corporation Low data line capacitance image sensor array using air-gap metal crossover
US6740884B2 (en) * 2002-04-03 2004-05-25 General Electric Company Imaging array and methods for fabricating same
US6559506B1 (en) 2002-04-03 2003-05-06 General Electric Company Imaging array and methods for fabricating same
US6777685B2 (en) * 2002-04-03 2004-08-17 General Electric Company Imaging array and methods for fabricating same
US7078702B2 (en) * 2002-07-25 2006-07-18 General Electric Company Imager
US6982176B2 (en) * 2003-10-30 2006-01-03 General Electric Company Method for monitoring production of pixel detectors and detectors produced thereby
US8679905B2 (en) * 2011-06-08 2014-03-25 Cbrite Inc. Metal oxide TFT with improved source/drain contacts
CN113728248B (en) 2019-04-24 2024-08-13 富士胶片株式会社 Radiographic imaging apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993014418A1 (en) * 1992-01-06 1993-07-22 The Regents Of The University Of Michigan Thin-film, flat panel, pixelated detector array for real-time digital imaging and dosimetry of ionizing radiation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0490997A4 (en) * 1989-09-06 1993-01-27 The University Of Michigan, Intellectual Property Office Multi-element-amorphous-silicon-detector-array for real-time imaging and dosimetry of megavoltage photons and diagnostic x-rays
US5017989A (en) * 1989-12-06 1991-05-21 Xerox Corporation Solid state radiation sensor array panel
US5117114A (en) * 1989-12-11 1992-05-26 The Regents Of The University Of California High resolution amorphous silicon radiation detectors
US5153438A (en) * 1990-10-01 1992-10-06 General Electric Company Method of forming an x-ray imaging array and the array
US5187369A (en) * 1990-10-01 1993-02-16 General Electric Company High sensitivity, high resolution, solid state x-ray imaging device with barrier layer
US5233181A (en) * 1992-06-01 1993-08-03 General Electric Company Photosensitive element with two layer passivation coating

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993014418A1 (en) * 1992-01-06 1993-07-22 The Regents Of The University Of Michigan Thin-film, flat panel, pixelated detector array for real-time digital imaging and dosimetry of ionizing radiation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FUJIEDA I ET AL: "Radiation imaging with 2D a-Si sensor arrays", CONFERENCE RECORD OF THE 1991 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (CAT. NO.91CH3100-5), SANTA FE, NM, USA, 2-9 NOV. 1991, ISBN 0-7803-0513-2, 1991, NEW YORK, NY, USA, IEEE, USA, pages 1882 - 1886 vol *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6239439B1 (en) 1997-11-28 2001-05-29 Canon Kabushiki Kaisha Radiation detecting device and radiation detecting method
DE19827020A1 (en) * 1998-06-17 1999-12-30 Siemens Ag Image detectors e.g. for scanning documents
WO2000057205A1 (en) * 1999-03-23 2000-09-28 Commissariat A L'energie Atomique X-ray imaging device and method for making same
FR2791469A1 (en) * 1999-03-23 2000-09-29 Commissariat Energie Atomique X-RAY IMAGING DEVICE AND METHOD FOR PRODUCING SUCH A DEVICE

Also Published As

Publication number Publication date
JP4002601B2 (en) 2007-11-07
EP0686268A1 (en) 1995-12-13
DE69417407T2 (en) 1999-10-07
DE69417407D1 (en) 1999-04-29
JPH08507659A (en) 1996-08-13
EP0686268B1 (en) 1999-03-24
US5587591A (en) 1996-12-24

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