Patent ID: 8008627
Filing Date: 2011-08-30
Classification: G01T

Abstract:
1. A radiation imaging element that receives radiation transmitted through a subject and outputs an image signal corresponding to an amount of the radiation, wherein the radiation imaging element comprises a plurality of pixel portions each comprising: a photoelectric conversion portion having a lower electrode formed on a substrate, a photoelectric conversion layer formed on the lower electrode, and an upper electrode formed on the photoelectric conversion layer; a phosphor layer formed on the upper electrode; a field-effect transistor provided at the substrate so as to correspond to the photoelectric conversion portion, for outputting the image signal corresponding to an electric charge generated in the photoelectric conversion layer; a capacitor that is electrically connected to the lower electrode and the field-effect transistor, wherein the field-effect transistor includes at least a gate electrode, a gate insulating layer, an active layer, and a source electrode and a drain electrode that are separate from the lower electrode, and an electric resistance layer is provided so as to be electrically connected between the active layer and at least one of the source electrode or the drain electrode, wherein at least the active layer and the electric resistance layer are laminated on the substrate, the active layer is in contact with the gate insulating layer, and the electric resistance layer is in contact with at least one of the source electrode or the drain electrode, and wherein the electric resistance layer is thicker than the active layer.