Patent ID: 7633573
Filing Date: 2009-12-15
Classification: G02F,H01L

Abstract:
1. A method of fabricating an LCD device, comprising: providing a first substrate divided into a pixel unit and a circuit unit; forming active patterns made of a poly-Si thin film in the pixel unit and the circuit unit and forming storage electrodes made of a conductive material on the active patterns, wherein the active patterns and the storage electrodes are formed by a single mask process; forming a first insulating film on the first substrate; forming gate electrodes in the pixel unit and the circuit unit, and forming common lines in the pixel unit; forming p+ source regions and p+ drain regions in regions of the active patterns; forming a first interlayer insulating film and a second interlayer insulating film on the first substrate; forming first contact holes and second contact holes that expose the source regions and the drain regions of the active patterns; forming a first conductive film and a second conductive film on the whole surface of the first substrate; forming first photosensitive film patterns having a first thickness in first regions of the first substrate, and second photosensitive film patterns having a second thickness in second regions thereof; forming source electrodes, drain electrodes and data lines made of the second conductive film in the first regions, and forming pixel electrodes made of the first conductive film and second conductive film patterns made of the second conductive film in the first regions, by selectively removing the first conductive film and the second conductive film by using the first photosensitive film patterns and the second photosensitive film patterns as masks; forming third photosensitive film patterns having a third thickness by removing the second photosensitive film patterns and partially removing the first photosensitive film patterns; exposing the pixel electrodes by removing the second conductive film patterns of the second regions by using the third photosensitive film patterns as masks, wherein the source electrodes and drain electrodes are electrically connected to the source regions and the drain regions of the active patterns through the first contact holes and the second contact holes, respectively, and wherein the source electrodes, the drain electrodes and the pixel electrodes are formed by a single mask process; providing a second substrate; forming a liquid crystal layer at least one of the first or second substrates; and attaching the first and second substrates.