Patent ID: 7279765

Claim:
A liquid crystal display device having transparent electrodes formed on an organic insulating film, wherein the liquid crystal display device includes a thin film transistor under the organic insulating film, wherein said transparent electrodes include a pixel electrode and a transparent storage capacitor electrode made of indium-zinc-oxide (IZO) having an amorphous structure adapted to be etched within 300 seconds with a low concentration of etchant, and the etchant is a mixture of C 2 H 2 O 4 and de-ionized water having a ratio between 1:128 and 1:350, wherein the pixel electrode is connected to a drain electrode of the thin film transistor through a contact hole, and wherein the transparent storage capacitor electrode has an amorphous structure adapted to be etched via a separate contact hole substantially simultaneously with the pixel electrode with no residual IZO film remaining in the separate contact hole.