Patent ID: 6940568

Claim:
A thin film transistor substrate for a liquid crystal display, comprising: a black matrix arranged between adjacent unit pixels on a transparent insulating substrate, for preventing light leakage between the adjacent unit pixels; a first oxide film formed on the black matrix; an active polysilicon layer pattern formed at an active region on the first oxide film; a second oxide film formed on a resultant substrate including the active polysilicon layer pattern, and including a first contact hole exposing a predetermined portion of the black matrix; a gate line formed on a selected area of the second oxide film and electrically contacting with the black matrix through the first contact hole; a third oxide film formed on a resultant substrate including the gate line; a data line formed on the third oxide film and perpendicular to the gate line; a planarizing film formed on the third oxide film including the data line; and a pixel electrode formed on the planarizing film.