Patent ID: 7195998

Claim:
A compound semiconductor device comprising: a mesa section formed on a wafer, the mesa section having two pairs of parallel exterior side surfaces, wherein one pair of the two pairs of parallel exterior side surfaces comprise a first exterior side surface and a second exterior side surface, the first exterior side surface and the second exterior side surface are parallelogramatic, the first exterior side surface being a forward mesa surface having an obtuse tilt angle with respect to the wafer, and the second exterior side surface being a backward mesa surface having an acute tilt angle with respect to the wafer, and wherein the other pair of the two pairs of parallel exterior side surfaces comprise a third exterior side surface and a fourth exterior side surface, the third exterior side surface and the fourth exterior side surface are parallelogramatic, the third exterior side surface being a forward mesa surface having an obtuse tilt angle with respect to the wafer, and the fourth exterior side surface being a backward mesa surface having an acute tilt angle with respect to the wafer.