Patent ID: 6335148
Filing Date: 2002-01-01
Classification: G02F

Abstract:
A method for manufacturing a thin film transistor liquid crystal display device having a back substrate, a front substrate opposed to said back substrate, a liquid crystal cell interposed between the front and back substrates, a pixel electrode formed on the back substrate, a counter electrode formed on the back substrate and adapted to cooperate with the pixel electrode to generate an electric field having a horizontal component parallel to a surface of the back substrate, and a thin film transistor including a gate electrode, a source electrode, and a drain electrode, the thin film transistor serving to apply an image signal voltage between said pixel electrode and said counter electrode, comprising the steps of:sequentially depositing a transparent conductive layer for the counter electrode and a metal layer for the gate bus line on the back substrate; forming a first photoresist layer on said deposited metal layer for the gate bus line; exposing said first photoresist layer to a scanning light, so that the portion of the first photoresist layer disposed over a counter electrode region for forming said counter electrode may be partially lightened; patterning said first photoresist layer so that an area of the metal layer for the gate bus line lying under the partially lightened portion of the first photoresist layer may not be exposed; patterning said metal layer for the gate bus line by using said patterned first photoresist layer as a barrier layer so that said counter electrode region and a gate bus line region may be defined; patterning said transparent conductive layer for the counter electrode by using said patterned metal layer as a barrier layer so that said counter electrode may be formed; patterning said metal layer for the gate bus line by using said patterned first photoresist layer as a barrier layer so that said gate bus line may be formed; forming the thin film transistor on said back substrate where said gate bus line has been formed; forming a protecting layer on said back substrate where said thin film transistor has been formed; patterning said protecting layer so that a part of the drain electrode included in said thin film transistor may be exposed; forming a transparent conductive layer for the pixel electrode on said back substrate where said drain electrode has been exposed; and patterning said transparent conductive layer for the pixel electrode so that said pixel electrode may be formed.