Thin film transistor array substrate and fabricating method thereof

A method of fabricating a thin film transistor array substrate, the method comprising:

• forming a gate line and at least one of a common line and another gate line separated from the gate line on a substrate;
• forming a data line crossing the gate line and a thin film transistor provided at the intersection between the gate line and the data line;
• forming a protective film covering the thin film transistor;
• removing a portion of the protective film to form a contact hole exposing a drain electrode of the thin film transistor and at least thin the protective film in a storage capacitor area;
• and
• forming a pixel electrode connected, via the contact hole, to the drain electrode of the thin film transistor, a storage capacitor being formed that includes the pixel electrode and the at least one of the common line or the other gate line.

A liquid crystal display comprising:

• a thin film transistor array substrate that includes:
• a first gate line and a data line crossing each other on a transparent substrate;
• a thin film transistor provided at an intersection of the first gate line and the data line;
• a protective film that covers the data line and the thin film transistor;
• a gate insulating film that covers the first gate line;
• and
• a pixel electrode connected to a drain electrode of the thin film transistor, the pixel electrode separated from a conductive material by an insulator to form a storage capacitor in a storage capacitor area, the insulator including at least one of the protective film or the gate insulating film, a thickness of the insulator in the storage capacitor area being thinner than a combined thickness of the protective film and the gate insulating film outside the storage capacitor area;
• a transparent substrate opposing the thin film transistor array substrate;
• and
• liquid crystal disposed between the substrates.