ELECTRO-MEDICAL IMAGING APPARATUS HAVING CHALCOGEN-THIN FILM TRANSISTOR ARRAY

摘要

Provided is an electro-medical imaging apparatus manufactured using a thin film transistor (TFT) array including chalcogen-based semiconductor elements that can generate and store an electric signal from an X-ray signal so as to be able to replace a traditional film type X-ray reader. The electro-medical imaging apparatus includes: a signal generating unit where electron-hole pairs are formed by absorbing an optical energy irradiated from outside; a power source connected to a surface of the signal generating unit and applies an electric signal so as to separate the electron-hole pairs to be accumulated each in opposite sides of the signal generating unit according to their polarities; a signal storage unit that is in contact with the signal generating unit and receives and stores one of the separated charges; and a signal converter that is in contact with the signal storage unit and applies a control signal to the signal storage unit in order to convert an electric signal, which generated by the charges stored in the signal storage unit, into an image signal. The signal generating unit may use amorphous selenium (a-Se), which is one of chalcogen materials, or CdTe or CdZnTe which is a compound material using chalcogen. Also, the signal storage unit may include a TFT array including Ge₂Sb₂Te₅ (GST) or a TFT array including CuInSe₂ (CIS).