Patent ID: 8466510

Claim:
A staggered column vertical superjunction semiconductor device comprising: a cell region having one or more device cells, wherein a portion of the device cells in the active cell region include: a first semiconductor layer of a first conductivity type; a second semiconductor layer of the first conductivity type located on top of the first semiconductor layer; and a plurality of first doped columns formed in the second semiconductor layer to a first depth and a plurality of second doped columns formed in the second semiconductor layer to a second depth, wherein the first depth is greater than the second depth, wherein the first and second doped columns are doped with dopants of a same second conductivity type that is different from the first conductivity type and wherein the first and second doped columns extend along a portion of a thickness of the second semiconductor layer, wherein the first and second doped columns alternate with each other in a row, wherein depths of alternate first and second doped columns within the row alternate between deeper and shallower, and wherein the first and second columns are adjacent to portions of the second semiconductor layer of the first conductivity type.