Patent ID: 7932554

Claim:
A semiconductor device having a modified recess channel gate comprising: a semiconductor substrate having an active region defined by a device isolation layer, wherein the active region extends in a major axis direction and a minor axis direction, and a width of the active region is defined in the minor axis direction; a trench formed in the active region, the trench comprising side walls and a bottom surface; a step formed at the bottom surface of the trench, the step comprising a lower surface, an upper surface, and a vertical surface, the vertical surface being connected substantially vertically between the lower surface and the upper surface, whereby the vertical surface is substantially perpendicular to the lower surface and the width of the active region; and a recess gate filling the trench comprising the step, wherein the step having the vertical surface increases an effective channel width of the recess gate relative to the width of the active region and increases an effective channel length of the recess gate relative to a depth of the trench.