An integrated circuit includes a first diffusion area for a first type transistor. The first type transistor includes a first drain region and a first source region. A second diffusion area for a second type transistor is spaced from the first diffusion area. The second type transistor includes a second drain region and a second source region. A gate electrode continuously extends across the first diffusion area and the second diffusion area in a routing direction. The first metallic layer is electrically coupled with the first source region. The first metallic layer and the first diffusion area overlap with a first distance. A second metallic layer is electrically coupled with the first drain region and the second drain region. The second metallic layer and the first diffusion area overlap with a second distance. The first distance is larger than the second distance.