Patent ID: 7518690

Claim:
An image display device comprising: a display section including pixels arranged in a matrix array and internal wiring lines; a wiring terminal section including a mounting region in which a driving semiconductor device is mounted; leading lines, which are formed in the wiring terminal section, for electrical interconnection between the internal wiring lines and the driving semiconductor device; each of the leading lines having a mounting electrode for mounting the driving semiconductor device and a testing electrode for testing the display section for a defect; a patterned first conductive film forming each of the leading lines, which is formed separate from the testing electrode, for electrically connecting the mounting electrode to a corresponding one of the internal wiring lines; an insulative film formed to cover the first conductive film; a patterned connecting conductive film formed on the insulative film to be in contact with the mounting electrode and the testing electrode, thereby electrically connecting the mounting electrode to the testing electrode; and the connecting conductive film being made of a material whose corrosion resistance in testing the display section for a defect is greater than that of a material for the testing electrode.