TFT substrate and liquid crystal display device having the same

A liquid crystal display (LCD) device comprising:

• an upper substrate;
• a polarization plate having a transmission axis;
• a lower substrate facing the upper substrate and disposed on the polarization plate, the lower substrate comprising:
• a plurality of gate lines extending in a first direction;
• a plurality of 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 the data lines;
• and
• a pattern disposed in a pixel region of the substrate to induce a stepped portion of the protection layer, the pixel region being defined by adjacent gate lines and adjacent data lines, a longitudinal direction of the pattern forming an angle of about 30 degrees to about 60 degrees with respect to the polarization axis;
• wherein if a thickness of the pattern is thicker than about 3000 angstroms, a side of 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 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 pattern forming an inclination angle of no more than about 90 degrees;
• and
• a liquid crystal layer disposed between the upper and lower substrates.

A liquid crystal display (LCD) device comprising:

• a first substrate comprising:
• a first base substrate;
• a plurality of patterns disposed at different heights with respect to the first base substrate;
• and
• an insulation layer formed on the first base substrate and the patterns, the insulation layer having a plurality of raised portions corresponding to the patterns, wherein a side of said raised portions forms an inclination angle relative to the first base substrate;
• a second substrate facing the first substrate;
• a liquid crystal layer disposed between the first and second substrates;
• and
• a voltage applying part that generates electric fields passing through the liquid crystal layer, wherein if a height of the raised portions is more than about 3000 angstroms, then the inclination angle is no more than about 45 degrees, when a height of the raised portions is in a range of about 2000 angstroms to about 3000 angstroms, then the inclination angle is no more than about 50 degrees, and when a height of the raised portions is less than about 2000 angstroms, then the inclination angle is no more than about 90 degrees.