Patent ID: 7619280

Claim:
A MOSgated trench device comprising: spaced source and drain regions; a first trench and a second trench; an active area surrounded by a transition region, said transition region includes a first region adjacent one edge of said active area and extending continuously between said active area and a first edge of said transition region and a second region adjacent another opposing edge of said active area and extending between said active area and a second edge of said transition region, each said first trench and said second trench being disposed outside said transition region and each said first trench and said second trench being lined with gate insulation and filled with a conductive body; and a plurality of parallel MOSgate trenches extending across said active area and each including a source region adjacent a respective sidewall thereof; said MOS gate trenches each containing a respective MOSgated structure that turns on in response to a gate signal applied to said MOSgated structures; wherein said first region and said second region of said transition region on opposite sides of said active area are free of a MOSgated structure and rendered inoperable to prevent contribution to the total conduction of said MOSgated trench device when a gate signal is applied to said MOSgated structures to turn said device on.