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Large area imager with UV blocking layer

  • US 6,020,590 A
  • Filed: 01/22/1998
  • Issued: 02/01/2000
  • Est. Priority Date: 01/22/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. An x-ray imager including a UV-blocking characteristic, the x-ray imager comprising:

  • a substrate;

    a UV-blocking or absorbing layer provided on a first side of said substrate, said UV-blocking or absorbing layer for blocking substantial amounts of certain ultraviolet (UV) rays from passing therethrough;

    an array of thin film transistors (TFTs) provided on a second side of the substrate, each of the TFTs including a gate electrode in electrical communication with a gate address line and a drain electrode, and each of the TFTs including a semiconductor layer;

    a photo-imageable insulating layer provided on the second side of the substrate over the array of TFTs;

    an array of electrodes provided on the second side of the substrate positioned such that said photo-imageable insulating layer is located between said array of electrodes and said substrate, each of said electrodes being in electrical communication with a corresponding one of said TFTs through a via or aperture defined in said photo-imageable insulating layer, and wherein each of said electrodes forms part of a storage capacitor;

    a photoconductor layer provided on the second side of said substrate so that said insulating layer is located between said photoconductor layer and said substrate, said photoconductor layer functioning so that said storage capacitors store charage in amounts that are functions of indident radiation received by the x-ray imager; and

    wherein said UV-blocking or absorbing layer minimizes the potential for undesirable patterns or nonuniformities being inadvertently imaged into said insulating layer.

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