An integrated circuit chip includes a semiconductor substrate having thereon a plurality of IMD layers and first conductive layers embedded in the IMD layers; a first insulating layer overlying the IMD layers and the first conductive layers; a plurality of first power/ground mesh wiring lines, in a second conductive layer overlying the first Insulating layer, for distributing power signal or ground signal; and a second insulating layer covering the second conductive layer and the first insulating layer.