X-RAY IMAGE SENSOR

专利名称：X-RAY IMAGE SENSOR

发明人：SPIVEY, Brett,MARTIN, Peter,MORSELL,

Lee,ATLAS, Eugene,PELLEGRINO, Anthony

申请号：EP96913041.0申请日：19960422公开号：EP0830619A1公开日：19980325

摘要：This invention provides an imaging system for producing images from

electromagnetic radiation such as x-rays. The system includes a detector comprised of aradiation-absorbing layer sandwiched between an array of CMOS integrated circuits(which we call pixel circuits) and a surface electrode layer transparent to the radiation.Each of the pixel circuits in the array has a charge collecting electrode. An externalvoltage applied between the surface electrode layer and the charge collectingelectrodes produces an electric field across the thickness of the absorbing layer.Radiation passing through the transparent surface electrode layer is absorbed in theabsorbing layer creating electron/hole pairs in the absorbing layer. A portion of theliberated holes (or electrons) migrates under the influence of the electric field towardthe charge collecting electrodes, which collect the holes and store them as charges onsmall capacitors located within each circuit. This process results in a discrete distributionof stored voltages across the array proportional to the distribution of radiation photonsincident on the absorbing layer. Circuitry in each pixel provides for the voltage on eachpixel capacitor to be recorded via readout circuitry and permits the resetting of the pixelcapacitors. Preferred embodiments provide fine resolution with a large number of pixels

with dimensions about the size of the thickness of human hair.

申请人：THERMOTREX CORPORATION

地址：9550 Distribution Avenue San Diego, CA 92121-2306 US

国籍：US

代理机构：VOSSIUS & PARTNER

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