A semiconductor device includes a plurality of first signal lines crossing a plurality of second signal lines. At least one of the first signal lines has a first end to receive a first voltage and a second end to receive a second voltage. The first and second voltages are applied simultaneously to respective ones of the first and second ends. A difference between the first and second voltages causes joule heating in the at least one first signal line. The joule heating may correct one or more defects in the semiconductor device.