Abstract: A TFT-LCD panel structure to prevent a TFT-LCD device provided therein from being damaged due to moisture penetration. The structure comprises upper and lower substrates and a display part having a thin film transistor array provided with a plurality of gate bus lines. A plurality of source bus lines are formed on the lower substrate and a pixel portion is formed on the upper substrate. A liquid crystal layer is formed between the substrates. Gate pad portions are formed at one side of the display part and include a plurality of gate pads connected to each corresponding gate bus line, for supplying a driving voltage to each of the gate bus lines through each corresponding gate pad. A first single passivation layer encloses each of the gate pad portions. Source pad portions are formed at upper and lower sides of the display part and include a plurality of source pads connected to each corresponding source bus line, for supplying a signal voltage to the source bus lines.