Patent ID: 7868958
Filing Date: 2011-01-11
Classification: G02F,H01L

Abstract:
1. A manufacturing method of liquid crystal display comprising: forming a gate line on an insulating substrate; forming a gate insulating layer on the gate line; sequentially forming a semiconductor layer, and a data layer on the gate insulating layer; forming a photosensitive film to a thickness on the data layer; forming a first photosensitive film pattern by exposing the photosensitive film to light using a mask to selectively develop predetermined portions of the photosensitive film, the mask being configured such that a plurality of regions are defined in the photosensitive film with certain ones of the plurality of regions having developed and undeveloped thickness, wherein in a first region the photosensitive film has a first undeveloped thickness, in a second region the photosensitive film has a second undeveloped thickness, in a third region the photosensitive film has a third undeveloped thickness which is less than the second undeveloped thickness, and in a fourth region the photosensitive film is developed to a thickness equal to the thickness of the photosensitive film; removing the developed portions of the photosensitive film; etching the data layer, the semiconductor layer, and the gate insulating layer under the fourth region using the first photosensitive pattern as a mask; forming a second photosensitive pattern by removing the first photosensitive film pattern to thereby expose the data layer under the third region; forming a semiconductor pattern and a data line including a preliminary source drain pattern and an end part by etching the data layer and the semiconductor layer using the second photosensitive film pattern as a mask; forming a third photosensitive film pattern by ashing the second photosensitive film pattern to thereby expose the preliminary source drain pattern under the second region; forming source and drain electrodes by etching the exposed preliminary source drain pattern using the third photosensitive film pattern as a mask; and removing the third photosensitive film pattern, wherein the gate insulating layer having at least two layers is partially removed during the etching process of the data layer, and is completely removed during the forming process of the source and drain electrodes.