Patent ID: 6891761

Claim:
A semiconductor device comprising: a semiconductor substrate; a field area including a semiconductor insulating layer on the semiconductor substrate and a plurality of active areas adjacent to the field area; a p-type first field effect type transistor and a p-type second field effect transistor disposed in a first active area; an n-type first field effect transistor and an n-type second field effect transistor disposed in a second active area; wherein the p-type first field effect type transistor, p-type second field effect transistor, n-type first field effect transistor and n-type second field effect transistor structures constitute a sense amplifier circuit; a third active area disposed between said first active area and said second active area; a fourth active area disposed in said first active area across the third active area; and a fifth active area disposed in the second active area across the third active area; wherein the difference between the distance between the first active area and the third active area and the distance between the first active area and the fourth active area is set to be smaller than the difference between the distance between the first active area and the third active area and the distance between the second active area and the third active area.