Patent ID: 7112868

Claim:
An IGBT with a monolithically integrated antiparallel diode, comprising: a semiconductor substrate forming an inner zone and having a front side, a rear side, and a peripheral annular high-voltage edge; said front side of said semiconductor substrate having semiconductor wells of a first conductivity type formed therein with transistor cells within said peripheral annular high-voltage edge, said peripheral annular high-voltage edge being provided on said front side of said semiconductor substrate; at least one emitter region of the first conductivity type formed at said rear side of said semiconductor substrate; at least one emitter short region of a second conductivity type integrated substantially only in a region of said high-voltage edge, said at least one emitter short region lying in a plane with said at least one emitter region and forming an electrode of the antiparallel diode, said at least one emitter short region extending as far as a chip end in edge regions of the IGBT; said at least one emitter region having no emitter short regions within said high-voltage edge; said at least one emitter region having a thickness of less than 1 micrometer and a doping with a dose of between 1·10 12 and 2·10 15 charge carriers per cm 2 ; said semiconductor wells on said front side of said semiconductor substrate forming a counterelectrode of the antiparallel diode; and a distance between a point located at the center of the IGBT and said at least one emitter short region being maximized for triggering the IGBT at a lowest possible current.