Patent ID: 7818598

Claim:
A semiconductor device, comprising: a cell placing area disposed on a semiconductor substrate, the cell placing area including a plurality of basic cells supplied with power from a local power supply line extending along a first direction on the semiconductor substrate; a global power supply line to supply power to the local power supply line extending along a second direction on the semiconductor substrate substantially orthogonal to the first direction, the local power supply line being disposed between the substrate and the global power supply line; at least one switch cell having a terminal electrically connected to the global power supply line, another terminal electrically connected to the local power supply line and a switch to turn ON and OFF power supply from the global power supply line to the local power supply line; and a repeater circuit disposed in the cell placing area, the repeater circuit supplied with power from the global power supply line without interposing the at least one switch, wherein the repeater circuit relays a signal through the cell placing area.