Patent ID: 6307231
Filing Date: 2001-10-23
Classification: H01L

Abstract:
A metal insulator semiconductor field effect type semiconductor device comprising:a semiconductor body having first and second major surfaces which are opposite to each other, said first major surface including an element forming region for metal insulated semiconductor field effect type elements and a peripheral region for a gate lead-out electrode of said elements;a trench formed in said element forming region from the first major surface into said semiconductor body excluding said peripheral region, so that said element forming region is divided into plural island regions by said trench, said plural island regions being spaced from each other by said trench and being arranged in a matrix, and outermost ones of said plural island regions, which are located in the outermost row or column of said matrix, being spaced from said peripheral region by said trench;a first insulation film formed over a sidewall and bottom of said trench and over said peripheral region of said first major surface; andan electrode conductive film disposed over said first insulation film and in said trench so as to be extended from said trench onto said peripheral region of the first major surface, a first part of said electrode conductive film disposed in said trench serving as a gate electrode for each of said island regions and a second part of said electrode conductive film disposed over said peripheral region and contiguous with said first part serving as a gate lead-out electrode electrically connected to said gate electrode.