Patent ID: 8581345

Claim:
A charge-balance power device, comprising: a semiconductor body having a first conductivity type and a surface; a first and a second columnar structure of a second conductivity type, each columnar structure extending through said semiconductor body; a first surface region of the second conductivity type, extending along said surface, on top of and in contact with said first columnar structure; a second surface region of the second conductivity type, extending along said surface at a distance from the first surface region, on top of and in contact with said second columnar structure; a third surface region of the first conductivity type, extending within the first surface region and facing said surface; a fourth surface region of the first conductivity type, extending within the second surface region and facing said surface, wherein the first and the second columnar structures extend at a distance from each other and are arranged staggered to one another with respect to a first direction and partially facing one another with respect to a second direction transversal to the first direction.