Patent ID: 6933568
Filing Date: 2005-08-23
Classification: C23C,G02F,H01L

Abstract:
1. A thin film transistor substrate for a liquid display comprising: an insulating substrate; gate formed on the substrate and comprising a gate line, a gate electrode, and a gate pad; a gate insulating film formed on the gate wiring and having contact openings for exposing at least the gate pad; a semiconductor pattern formed on the gate insulating film; a contact layer pattern formed on the semiconductor layer pattern; data wiring formed on the contact layer pattern, the data wiring having substantially the same shape as the contact layer pattern and comprising a source electrode, a drain electrode, a data line, and a data pad; a protection film pattern formed on the data wiring, the protection film pattern having contact openings for exposing the gate pad, the data pad, and the drain electrode, and comprised of a low dielectric insulating film; a transparent electrode layer pattern electrically connected with the exposed gate pad, data pad, and drain electrode, a maintenance capacity line formed on the same layer as the gate wiring on the insulating substrate; a maintenance capacitor semiconductor pattern overlapping the maintenance capacity line and formed on the same layer as the semiconductor pattern; a maintenance capacitor contact layer pattern formed n the maintenance capacitor semiconductor pattern and having the same area and shape as the maintenance capacitor semiconductor pattern; and a maintenance capacitor conductor pattern formed on the maintenance capacitor contact layer pattern and having the same area and shape as the maintenance capacitor semiconductor pattern, wherein the maintenance capacitor conductor pattern is connected with a part of the transparent electrode pattern, wherein the low dielectric insulating film is an a-SiCOH thin film vapor deposited by a CVD or PECVD method by adding a reactant gas mixture comprising main source gas, silane (SiH