Patent ID: 7709887

Claim:
An insulated gate semiconductor component comprising: a first semiconductor region comprising drift region of a first conductivity type; a second semiconductor region comprising body region of a second conductivity type, formed on or in an upper main surface of the first semiconductor region, said second conductivity type being opposite to said first conductivity type; a third semiconductor region comprising an emitter region of the first conductivity type formed selectively in a front surface of the second semiconductor region; a trench having an opening in the front surface of the third semiconductor region and extending into a depth from the opening into the second semiconductor region; a dielectric layer provided in the trench and completely covers a bottom thereof and extends to a location higher than an upper main surface of the first semiconductor region; a gate electrode filled in the interior of the trench; and a fourth semiconductor region of the first conductivity type in direct contact with the first and second semiconductor regions, wherein the fourth semiconductor region is arranged at a distance from the trench, wherein a distance between the trench and the fourth semiconductor region is within the range of 10-200 nm, and wherein a dopant dose of the fourth semiconductor region is within the range of 1×10 11 cm −2 to 1×10 12 cm −2 .