A thin film transistor substrate, its manufacturing method and a liquid crystal display panel having the same

A thin film transistor substrate includes a color filter and black matrix. The color filter is located between the first gate insulating film and a second gate insulating film. A second gate insulating film are formed on the upper semiconductor layer and the data wire. The data line may include a first data metal layer and second metal layer data. The black matrix is ​​formed at a portion corresponding to a channel region of the semiconductor layer on the thin film transistor substrate. By insulating the color filter with a first gate insulating film and a second gate insulating film can protect the gate wiring layer, and securing an excellent thin film transistor characteristics and improved aperture ratio by reducing the alignment margin by forming a black matrix on thin film transistor substrate. COA, AOC, a double-gate insulating film, BOA, COT, TOC