Patent ID: 8022471

Claim:
A trenched semiconductor power device formed in a semiconductor substrate comprising: a plurality of trenched gates having substantially vertical trench sidewalls and rounded trench bottoms surrounded by source regions near a top surface of an epitaxial layer encompassed in body regions along an upper portion of the trench sidewalls; tilt-angle implanted body dopant regions surrounding a lower portion of the trench sidewalls and an upper portion of said rounded trench bottoms of said trenched gates for reducing a gate-to-drain coupling charges Qgd between said trenched gates and a drain disposed at a bottom of said semiconductor substrate; said tilt-angle implanted body dopant regions disposed below said body regions between two adjacent trenched gates and spaced apart from each other; and a source dopant region disposed below said round trench bottoms of said trenched gates and adjacent to said tilt-angle implanted body dopant regions for functioning as a current path between said drain to said source for preventing a resistance increase caused by said tilt-angle implanted body dopant regions surrounding said lower portions of said trench sidewalls and said upper portion of said rounded trench bottoms of said trenched gates.