Patent ID: 7091554
Filing Date: 2006-08-15
Classification: H01L

Abstract:
1. A semiconductor device comprising: a plurality of stripe trench lines which are provided in each of adjacent cell regions of a semiconductor layer in parallel and extended from a first cell region toward a second cell region; a gate insulating film formed in each of the trench lines; and a gate electrode embedded in each of the trench lines with the gate insulating film interposed therebetween, wherein, in each of the first and second cell regions, a first pair of stripe trench lines of the first cell region have adjacent ends on a side of the first cell region, the side facing the second cell region, the adjacent ends are connected to each other by connecting portions, and a second pair of stripe trench lines of the first cell region have on the side facing the second cell region adjacent ends separated by open portions and not connected along the side, and at least one of the connecting portions of the first cell region faces a corresponding open portion of the second cell region.