Patent ID: 7683402

Claim:
A semiconductor device comprising: a first transistor including a first gate electrode provided above a semiconductor substrate, and a first source and a first drain provided in the semiconductor substrate disposing the first gate electrode therebetween, wherein the first gate electrode has a first curvature concaving toward the first source or the first drain; a second transistor arranged to be adjacent to the first transistor, and including a second gate electrode provided above the semiconductor substrate in parallel with the first gate electrode, and a second source and a second drain provided in the semiconductor substrate disposing the second gate electrode therebetween, wherein the second gate electrode has the first curvature; and a third gate electrode provided between the first transistor and the second transistor in parallel with the first and second gate electrodes, wherein the third gate electrode has a second curvature concaving toward an opposite direction to the first curvature, wherein the first transistor and the second transistor have the same current driving force.