Patent ID: 6208011
Filing Date: 2001-03-27
Classification: H01L,H03K

Abstract:
A power semiconductor device comprising:a semiconductor substrate;a voltage-controlled transistor having a first electrode formed on the lower surface of said semiconductor substrate, a gate insulated by a gate oxide formed on said semiconductor substrate and a second electrode formed on said semiconductor substrate; anda zener diode formed on the upper surface of said semiconductor substrate so as to be connected between said gate and said second electrode;wherein p-type regions and n-type regions alternately formed between said zener diode and said second electrode on said semiconductor substrate, a plurality of pad electrodes on said p-type regions and said n-type regions so as to allow one or not less than two diodes are series connected between said zener diode and said second electrode, and the distance between the adjacent pad electrodes is set so that when said diode is subjected to a current not less than a predetermined value, said pad electrodes are fused so that short-circuiting occurs between the adjacent pad electrodes.