Patent ID: 6078066
Filing Date: 2000-06-20
Classification: H01L

Abstract:
A power semiconductor switching device comprising:a power semiconductor switching component housed within a flat package and provided with first and second main flat electrodes between which a main current flows when said power semiconductor switching component is turned on, and a control electrode which is shaped like a ring and which projects outwardly from the flat package and pairs up with said second main flat electrode for controlling electrical conduction between said first and second main flat electrodes;forward bias driving circuitry for applying a forward bias between said control electrode and said second main electrode;reverse bias driving circuitry including:storage elements arranged around the perimeter of said control electrode of said power semiconductor switching component, wherein said storage elements store an electric energy supplied by a reverse bias power supply circuitry to apply a reverse bias between said control electrode and said second main electrode, andswitching units connected in series to said storage elements, wherein said switching units can be turned on to apply the electric energy stored in said storage elements between said control electrode and said second main electrode; anda mounting board on which said reverse bias driving circuitry is contained, said mounting board having a through hole through which said second main electrode of said power semiconductor switching component penetrates so that said flat package is located in the proximity of the through hole and the perimeter of the through hole partially surrounds the flat package, and a conducting member formed on one surface of said mounting board and electrically connected to said control electrode of said power semiconductor switching component.