Patent ID: 8759885

Claim:
A semiconductor device, comprising: a rectangular standard cell defined in a semiconductor substrate and having first, second, third, and fourth boundaries, wherein the first and second boundaries are on opposite ends of the standard cell, and wherein the third and fourth boundaries are on opposite ends of the standard cell, the standard cell comprising: a plurality of active regions including first and second active regions formed in the semiconductor substrate, and having a first spacing distance (a) from the first and second boundaries, respectively; at least one gate electrode strip formed over the first and second active regions; first and second dummy diffusion layers formed in the semiconductor substrate, wherein the first and second dummy diffusion layers extend along the third boundary and have the first spacing distance (a) from the first and second boundaries and a second spacing distance (b) from the first and second active regions, respectively; and third and fourth dummy diffusion layers formed in the semiconductor substrate, wherein the third and fourth dummy diffusion layers extend along the fourth boundary and have the first spacing distance (a) from the first and second boundaries and a third spacing distance (b′) from the first and second active regions, respectively.