Patent ID: 7273772

Claim:
A method for forming a thin film transistor (TFT) array panel, comprising: providing a substrate; forming a plurality of gate lines on the substrate; successively forming a gate insulating layer on the plurality of gate lines, a semiconductor layer on the gate insulating layer, and an ohmic contact layer on the semiconductor layer in a first chemical vapor deposition (CVD) apparatus; generating a substantially pure fluorine gas, comprising: performing electrolysis in a fluorine generator to generate fluorine gas; filtering the fluorine gas by flowing the gas through a filter with a compressor, wherein the filtered gas is the substantially pure fluorine gas; and compressing the substantially pure fluorine gas into a fluorine cylinder; generating a fluorine plasma with the substantially pure fluorine gas in a remote plasma source (RPS) box connected to the first CVD apparatus; and cleaning the first CVD apparatus with the fluorine plasma after a predetermined number of the successive forming steps.