Patent ID: 7274077
Filing Date: 2007-09-25
Classification: H01L

Abstract:
1. A trench transistor comprising: a) a cell array including a plurality of cell array trenches; and b) an edge structure framing the cell array, the edge structure including an edge trench spaced apart from the plurality of cell array trenches, wherein the plurality of cell array trenches run substantially parallel to one another, and wherein the plurality of cell array trenches comprise two outermost cell trenches, each of the plurality of cell array trenches comprise longitudinal sides and end sides, and the plurality of cell array trenches are spaced apart from one another by a distance A, a distance B is defined between the longitudinal sides of the two outermost cell array trenches and the edge trench, and a distance C is defined between the edge trench and the end sides of the cell array trenches, such that A<=B and A<=C, or A<=B<=C.