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Thin film transistor, active matrix substrate, and image pickup device

  • US 8,134,151 B2
  • Filed: 08/11/2009
  • Issued: 03/13/2012
  • Est. Priority Date: 08/19/2008
  • Status: Active Grant
First Claim
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1. An active matrix substrate comprising:

  • a plurality of thin film transistors, each thin film transistor comprising;

    source and drain electrodes,an active layer that contacts the source and drain electrodes and contains an oxide semiconductor, a gate electrode that controls current flowing between the source and drain electrodes via the active layer,a first insulating film that separates the gate electrode from the source and drain electrodes and the active layer,a bias electrode that is arranged at the opposite side of the active layer from the gate electrode, and has an electric potential fixed independently from the gate electrode, anda second insulating film that separates the bias electrode from the source and drain electrodes and the active layer, whereinthe plurality of thin film transistors are arranged on a support, andall the bias electrodes are interconnected such that they are all electrically common with one another.

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