Patent ID: 6339231
Filing Date: 2002-01-15
Classification: H01L

Abstract:
A gate commutated turn-off thyristor module comprising:a) a gate commutated turn-off thyristor including 1) a semiconductor substrate in which a thyristor element is fabricated, 2) a set of main electrodes provided with said semiconductor substrate interposed therebetween, 3) an insulating cylinder surrounding said semiconductor substrate and said set of main electrodes, and 4) a gate terminal plate electrically connected to a gate electrode of said thyristor element and projected like a ring on an outer periphery of said insulating cylinder; b) a driving circuit including 1) a circuit section for supplying a gate current to said gate terminal plate, and 2) a connecting substrate having an insulating plate and first and second conductive layers respectively provided on first and second main surfaces of said insulating plate and electrically connected to said circuit section; c) a conductive main electrode plate electrically connected to one of said main electrodes; d) a set of rings provided to interpose said gate terminal plate and said main electrode plate therebetween with said gate terminal plate abutting on said first conductive layer and said main electrode plate abutting on said second conductive layer; e) a screw for fastening said set of rings to each other; and f) an insulator for electrically insulating said screw from said gate terminal plate and one of said rings contacting with said gate terminal plate or from said main electrode plate and the other ring contacting with said main electrode plate.