In an LCD source driver, to enhance the ESD performance thereof, there is
provided a path in a device area penetrating thereacross such that an
internal power wire or an internal ground wire to connect between an
output pad and a power-rail ESD clamp circuit on two margins,
respectively, of the LCD source driver could pass through the path to
shorten the internal power wire or the internal ground wire and thereby
to avoid chip area increase for the ESD mechanism.