Patent ID: 8012813
Filing Date: 2011-09-06
Classification: G02F,H01L

Abstract:
1. A method of manufacturing a display substrate comprising: depositing a gate metallic layer, a gate insulation layer and a channel layer, in sequence, on a base substrate; forming a gate electrode of a switching device, a channel pattern on the gate electrode and a gate line by a first photoresist pattern; depositing a transparent conductive layer on the base substrate having the channel pattern; depositing a source metallic layer on the transparent conductive layer; forming a source electrode, a drain electrode of the switching device, a pixel electrode electrically connected to the drain electrode and a source line by a second photoresist pattern; forming a first protective insulation layer; and removing the first protective insulation layer on the pixel electrode by a third photoresist pattern, wherein forming the gate line comprises: forming the first photoresist pattern including a first pattern of a first thickness in a gate electrode area and a second pattern of a second thickness in a gate line region on the base substrate having the channel layer; etching the channel layer, the gate insulation layer, and the gate metallic layer in sequence by the first photoresist pattern as an etching mask; selectively etching the channel layer in the gate line area by the first pattern as an etching mask; and removing the first pattern to form the gate electrode and the channel pattern in the gate electrode area, wherein selectively etching comprises: removing the first photoresist pattern at a predetermined thickness to expose the channel layer in the gate line area and to leave a third pattern in the gate electrode area and etching the channel in the gate line area by the third pattern.