Patent ID: 8143914

Claim:
A semiconductor integrated circuit, comprising: a circuit block including an internal voltage line; a first annular line which forms a closed annular line around said circuit block and to which a power supply voltage or a reference voltage is applied; a second annular line which forms a closed annular line between said first annular line and said circuit block and is connected at a plurality of places thereof to said internal voltage line; and a plurality of switches electrically connected between said first annular line and said second annular line, wherein said semiconductor integrated circuit further comprises a switch block disposed around said circuit block, wherein the plurality of switches is configured from a plurality of switch transistors disposed in said switch block, wherein, in said switch block, said first annular line and said second annular line are wired in a juxtaposed relationship with each other, and part of the plurality of switch transistors are disposed in a region of a layer below said first annular line and said second annular line, wherein said semiconductor integrated circuit comprises a plurality of such switch blocks, and wherein each of said switch blocks has a rectangular outer periphery such that the distance from an inner side edge from among the four edges of the outer periphery of each of said switch blocks which is near to said circuit block to said first annular line is equal among the plural switch blocks and besides the distance from the inner side edge to said second annular line is equal among the plural switches.