Patent ID: 8564054

Claim:
A trench semiconductor power device formed on a semiconductor layer comprising: a plurality of first type active cells under a source metal pad, each of said first type active cells comprising a first type trenched source-body contact filled with a contact metal plug penetrating through a contact interlayer, a source region of a first conductivity type and extending into a body region of a second conductivity type between a pair of gate trenches filled with poly-silicon padded by a gate insulation layer; a plurality of second type active cells under a gate metal pad and being insulated from said gate metal pad by an inter-metal isolation layer, each of said second type active cells comprising a second type trenched source-body contact filled with said contact metal plug penetrating through said contact interlayer, said source region and extending into said body region between a pair of said gate trenches filled with poly-silicon; and under both said source metal pad and said gate metal pad, said source region and said body region connected to said source metal pad through said contact metal plug, and said poly-silicon filled into said gate trenches connected to said gate metal pad.