Patent ID: 7678653

Claim:
A method for fabricating a semiconductor device having recess gates comprising: forming inverse, asymmetric triangular recesses having a first sidewall and a second sidewall by selectively etching the surface of a semiconductor substrate at a tilt, wherein the first sidewall is perpendicular to a surface of the semiconductor substrate and the second sidewall is sloped with respect to the surface of the semiconductor substrate and the triangular recesses define first and second regions; implanting ions into the inverse triangular recesses; forming a gate insulating film having a designated thickness on exposed side of the inverse triangular recess trench; forming a gate conductive film and a gate metal film sequentially on the gate insulating film so that the gate conductive film and the gate metal film fill the inverse triangular recess and protrude from the surface of the semiconductor substrate; and forming first and second junctions at the first and second regions, wherein the first and second junctions opposed to each other so that a channel is located along the first sidewall and the second sidewall.