Patent ID: 7728329

Claim:
A thin film transistor array panel for an X-ray detector, the thin film transistor array panel comprising: a gate wire formed on an insulating substrate and comprising a gate line and a gate electrode connected to the gate line; a gate insulating layer formed on the gate wire; a semiconductor layer formed on the gate insulating layer; a data wire formed on the gate insulating layer and comprising: a data line which intersects the gate line; a source electrode connected to the data line and disposed on the semiconductor layer; and a drain electrode disposed on the semiconductor layer separate from the source electrode; a photo diode comprising: a first electrode connected to the drain electrode; a second electrode which faces the first electrode; and a photo-conductive layer disposed between the first electrode and the second electrode; a passivation layer disposed on the photodiode, the semiconductor layer, the data wire and the drain electrode, the passivation layer having a contact hole which exposes the second electrode; and a bias signal line disposed directly on the passivation layer, connected to the second electrode through the contact hole and comprising a light blocking layer which covers the photo diode.