Display panel and method of manufacturing the same

A method of manufacturing a display panel, comprising:

• preparing a first substrate;
• forming a gate line on the first substrate;
• forming a semiconductor pattern partially overlapped with the gate line;
• forming a data line on the first substrate to define a pixel area together with the gate line;
• forming a source electrode branched from the data line in the pixel area;
• forming a drain electrode spaced apart from the source electrode in the pixel area and the drain electrode comprising a same material as the source electrode;
• forming a pixel electrode electrically connected to the drain electrode in the pixel area;
• and
• combining the first substrate and a second substrate facing the first substrate,
• wherein the source and drain electrodes are formed by:
• forming on the first substrate, an aluminum based alloy layer containing a sufficient amount of nickel to substantially inhibit corrosion during dry etching of the aluminum based alloy layer;
• and
• patterning the aluminum based alloy layer.