Patent ID: 6445003
Filing Date: 2002-09-03
Classification: H01L

Abstract:
A thin film transistor (TFT) type optical detecting sensor having a plurality of pixels, each pixel comprising:a sensor drain wire and a switching source wire, each disposed on opposite sides of the pixel; a storage capacitor for storing charges, the storage capacitor comprising a first capacitor electrode and a second capacitor electrode; a switching TFT for conducting the charges stored in the storage capacitor to an external system, the switching TFT comprising a switching gate electrode and switching source and drain electrodes, each disposed along a side of the pixel in a substantially perpendicular direction to a direction along which the sensor drain wire is disposed, an area between the switching source and drain electrodes defining a switching TFT channel; and a sensor TFT for generating optical current and supplying the optical current to the storage capacitor, the sensor TFT comprising a sensor gate electrode and sensor drain and source electrodes and, wherein a width of the channel of the switching TFT is substantially equal to a length of a side of the pixel, excluding a width of the switching source wire and a width of the sensor drain wire.