Thin film transistor array substrate and method for manufacturing the same

A thin film transistor (TFT) array substrate comprising:

• a base substrate;
• a common electrode line, a gate line and a gate electrode formed on the base substrate;
• a gate insulating layer formed above the common electrode line, the gate line and the gate electrode;
• a semiconductor layer formed above the gate insulating layer located on the gate electrode;
• a source electrode and a drain electrode formed above the semiconductor layer with a channel defined between the source electrode and the drain electrode;
• a passivation layer formed above the base substrate including the common electrode line, the gate line, the gate electrode, the source electrode, the drain electrode and the channel;
• a first via hole formed in the passivation layer located above the source electrode;
• a second via hole formed in the passivation layer located above the drain electrode;
• a data line which is connected to the source electrode through the first via hole;
• and
• a pixel electrode which is connected to the drain electrode through the second via hole.