Linear X-ray detector with monolithic detector chip including both photodiode array and peripheral circuits spaced apart
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United States of America Patent
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Feb 28, 2012
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N/A
app pub date -
Aug 18, 2008
filing date -
Aug 18, 2008
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Abstract
A radiation damage resistant linear X-ray detector array system based on a unique buttable monolithic image sensor design and precision chip-on-board assembly technology includes at least one of the detector chips. Multiple chips of the image sensor may be butted end-to-end on a common printed circuit board to accommodate larger detection systems. A layer of scintillating material, such as Gd2O2S:Tb (GOS), CsI(Tl), or CdWO4, is placed on the image sensor to convert the impinging X-ray energies into visible light which can be detected efficiently by the image sensor array. A protective metal shield is fastened to the substrate to protect the sensitive circuits of the image sensor from X-ray radiation damage. A proper separation of sensitive circuits from the photodiode array on the sensor chip, coupled with precision registration of the sensor chips on the substrate, allows easy installation of the protective metal shield.
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