Patent ID: 7157921
Filing Date: 2007-01-02
Classification: G01N

Abstract:
1. A TFT array inspection apparatus for inspecting a TFT array, comprising: irradiating means for irradiating an electron beam on the TFT array including a specific pixel and a specific site on a TFT substrate to obtain a secondary electron signal, scanning means for scanning the electron beam on the TFT substrate to obtain a scanning signal, defect detecting means for detecting a defective site on the TFT substrate according to the scanning signal, defect analyzing means for analyzing at least one of a type and an extent of a defect in the defective site based on a change in a waveform of the secondary electron signal and a driving state of the TFT array, and a memory electrically connected to the defect detecting means and the defect analyzing means so that the defective site on the TFT substrate is memorized in the memory when the defect detecting means detects the defective site, and the defective site in the memory is provided to eject electron beam from the irradiating means when the defect analyzing means is operated, wherein said defect analyzing means analyzes the defective site in detail after the defect detecting means finds the defective site by scanning the entire TFT array.