The present invention provides a thin film transistor having high performance in a liquid crystal display, and a manufacturing method of a liquid crystal display according to an exemplary embodiment of the present invention that includes: forming a gate line including a gate electrode on a substrate; forming a gate insulating layer on the gate line; forming a data line including a source electrode and a drain electrode facing the source electrode on the gate insulating layer; forming a partition defining a pixel area and having an opening region exposing the gate insulating layer on the gate electrode, the source electrode and the drain electrode on the gate line, and the data line and the drain electrode; forming a semiconductor in the opening region; forming a color filter in the pixel area defined by the partition; and forming a pixel electrode connected to the drain electrode on the color filter.