Patent ID: 8299465

Claim:
An X-ray detector, comprising: a first substrate; agate electrode formed on the first substrate; agate insulating layer formed on the gate electrode and the first substrate, and formed to cover the gate electrode; a first semiconductor layer of a thin film transistor stacked on one part of the gate insulating layer; a data line configured to include a source electrode to cover a first portion of the first semiconductor layer; a first lower electrode configured to include a drain electrode opposite to the source electrode, formed on the upper portion of the gate insulating layer and a second portion of the first semiconductor layer, and extending from the drain electrode; a passivation layer formed on an upper portion of one part of the first lower electrode; a second lower electrode formed on an upper portion of the passivation layer and on an upper portion of the first lower electrode on which the passivation layer is not formed; a second semiconductor layer of a diode formed on an upper portion of the second lower electrode; and an upper electrode formed on an upper portion of the second semiconductor layer of the diode, wherein the second lower electrode is formed approaching the gate electrode and is formed not to overlap with the gate electrode.