Patent ID: 9515067
Filing Date: 2016-12-06
CPC Classification: H01L,H02M

Claim Text:
1. A semiconductor device comprising: a semiconductor switching element with an insulated gate structure; and a free wheel diode, wherein the semiconductor switching element includes: wherein the semiconductor switching element provides an inversion channel in a portion of the base region opposite to the element-side gate electrode via the gate insulating film therebetween, wherein the semiconductor switching element provides a current flowing between the element-side first electrode and the element-side second electrode through the channel, wherein the free wheel diode includes: wherein the free wheel diode provides a p-n junction including the first conductivity type layer and the second conductivity type layer, wherein the free wheel diode provides a current flowing between the diode-side first electrode and the diode-side second electrode, wherein the semiconductor switching element and the free wheel diode are coupled in parallel with each other, wherein the free wheel diode further includes: wherein the diode-side gate electrode includes a first gate electrode, wherein the first gate electrode provides an excess carrier injection suppression gate, wherein, when a gate voltage is applied to the diode-side gate electrode, the first gate electrode provides another inversion channel in a part of the second conductivity type layer, wherein the part of the second conductivity type layer is arranged between the diode-side first impurity region and a predetermined position, which is disposed between the diode-side first impurity region and the first conductivity type layer, wherein the semiconductor switching element and the free wheel diode are arranged in one chip, wherein the drift layer is the first conductivity type layer, wherein the base region is the second conductivity type layer, wherein the element-side first electrode is the diode-side first electrode, wherein the element-side second electrode is the diode-side second electrode, wherein the element-side first impurity region is the diode-side first impurity region, wherein the element-side gate electrode is the diode-side gate electrode, wherein the first gate electrode is arranged between the element-side first impurity region via the gate insulating film and a predetermined position of the base region, wherein the element-side gate electrode includes a second gate electrode, wherein the second gate electrode is arranged between the predetermined position of the base region via the gate insulating film and the drift layer, wherein, when the gate voltage is applied to the element-side gate electrode, the first gate electrode and the second gate electrode function as a semiconductor switching element driving gate, wherein the semiconductor switching element driving gate provides the channel connecting between the element-side first impurity region and the drift layer together in the base region, and the predetermined position of the base region is provided by a deepest position of the first gate electrode, the deepest position being farthest from the diode-side first electrode among any position of the first gate electrode.