A liquid crystal display can include a gate wire including a gate line, a gate pad and a gate line connector and a common signal wire formed on a substrate. A gate insulating layer may be formed over the gate wire and the common signal wire. A semiconductor layer and an ohmic contact layer may be sequentially formed on the gate insulating layer, a data wire including a source and a drain electrode, a data line, a data pad, a data line connector and a pixel electrode may be formed thereon. The thickness of the data wire and the pixel electrode may be equal to or less than 500 Å.