Patent ID: 7492427

Claim:
A thin film transistor (TFT) substrate, comprising: a substrate; a plurality of gate lines formed on the substrate, the gate lines extending in a first direction; a plurality of data lines formed on the substrate, the data lines extending in a second direction that is substantially perpendicular to the first direction; a plurality of pixel electrodes, each of the pixel electrodes being electrically connected to a TFT that is electrically connected to a selected gate line and a selected data line; a protection layer formed on the substrate such that the protection layer covers the gate lines and data lines; and a pattern disposed in a pixel region of the substrate to induce a stepped portion of the protection layer, a longitudinal direction of the pattern forming an angle of about 30 degrees to about 60 degrees with respect to one of the first and second directions; wherein if a thickness of the pattern is thicker than about 3000 angstroms, then a side of the protection layer on the pattern forms an inclination angle of no more than about 45 degrees, if a thickness of the pattern is in a range of about 2000 angstroms to about 3000 angstroms, then the side of the protection layer on the pattern forms an inclination angle of no more than about 50 degrees, and if a thickness of the pattern is less than about 2000 angstroms, then the side of the protection layer on the pattern forms an inclination angle of no more than about 90 degrees.