Patent ID: 8643102
Filing Date: 2014-02-04
Classification: H01L,H03K

Abstract:
1. A control device of a semiconductor device controlling driving of a semiconductor device, the control device comprising: a semiconductor substrate; a drain electrode formed on a rear surface of the semiconductor substrate; a plurality of well regions formed on a surface of the semiconductor substrate; a plurality of semiconductor regions formed on the surface of the semiconductor substrate in a region at a deeper position than the well regions and having a conductivity opposite to that of the well regions; a plurality of source regions formed in the well regions; a trench penetrating the source regions and the well regions and reaching a first semiconductor region; a gate insulating film formed on a side surface and a bottom surface of the trench; a first gate electrode formed on the gate insulating film; a source electrode electrically connected to the source region; a second gate electrode provided under the first gate electrode and connected to the first gate electrode and the first semiconductor region by an interposing insulating film portion; a first gate electrode pad electrically connected to the first gate electrode; a metal wiring electrically connected to the first gate electrode pad; a second gate electrode pad electrically connected to the second gate electrode; and a metal wiring electrically connected to the second gate electrode pad, wherein a surface area of the metal wiring electrically connected to the first gate electrode pad is larger than a surface area of the metal wiring electrically connected to the second gate electrode pad, wherein driving of the second gate electrode is controlled so that the second gate electrode is at a same potential as the source electrode when outputting a control signal of turning ON or OFF to the first gate electrode.