Liquid crystal display substrate, method of manufacturing the same, and liquid crystal display device having the same

A liquid crystal display substrate comprising:

• a plurality of pixel areas each having at least a portion thereof a reflection area reflecting light incident from a front surface side of the substrate;
• a wrinkled resin layer formed with a positive light-sensitive resin in the reflection area, the wrinkled resin layer having at least a portion thereof a wrinkled surface;
• a reflection electrode formed with a light reflection material on the wrinkled resin layer, the reflection electrode having a wrinkled surface following the surface of the wrinkled resin layer;
• a light shielding portion formed as an underlayer of the wrinkled resin layer, the light shielding portion shielding light incident from a back surface side of the substrate;
• and
• a thin film transistor formed in each of the pixel areas,
• wherein at least a portion of the light shielding portion is formed in a same layer with the same material as an active semiconductor layer of the thin film transistor, to shield a large proportion of an area of the under area of the wrinkled resin layer from light, along with a storage capacitor electrode.

A method of manufacturing a liquid crystal display substrate having a reflection area reflecting light incident from a front surface side of a substrate, and a transparent area transmitting light incident from a back surface side of the substrate, in each of the pixel areas, the method comprising the steps of:

• forming a first electroconductive film having light transmittance and a second electroconductive film having light shielding capability in this order on the substrate;
• forming a light shielding portion in the reflection area and an electroconductive layer having a predetermined shape in the transmission area by patterning the first and second electroconductive films;
• forming an insulating film on the light shielding portion and the electroconductive layer;
• exposing the electroconductive layer by removing the insulating film in the transmission area;
• forming a transparent electrode by removing the second electroconductive film of the exposed electroconductive layer;
• forming a resin layer having a predetermined shape on the insulating film in the reflection area;
• forming a wrinkled resin layer having wrinkled unevenness on at least a portion of a surface thereof by curing and heat treating a surface of the resin layer;
• and
• forming a reflection electrode on the wrinkled resin layer.