Patent ID: 8686468

Claim:
A semiconductor power device comprising: an epitaxial layer of a first conductivity type supported onto a substrate; a wide termination trench formed in said epitaxial layer in a termination area; a trenched field plate disposed along inner surface of said wide termination trench and padded with a termination insulating layer, having a L shape or an U shape structure and connected to a source metal runner; a first active area under a source metal pad, having a plurality of transistor cells and source regions of said first conductivity type; a second active area near said wide termination trench connected to said first active area and shorted to said source metal runner, having said source regions and at least one stripe transistor cell; wherein said source regions are formed in an upper portion of body regions of a second conductivity type, each of said source regions having a greater junction depth and a higher doping concentration along sidewalls of a trenched source-body contact than along an adjacent channel region near trenched gates flanked by said source regions at a same distance from a top surface of the epitaxial layer, wherein said trenched source-body contact is filled with a contact metal plug and penetrating through a contact interlayer, said source regions and extending into said body regions to connect said source regions and said body regions in said first and second active areas.