Patent ID: 6130139
Filing Date: 2000-10-10
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, comprising:a first step of forming, in a semiconductor substrate having a substrate region of a first conductivity type, a first trench for partitioning said substrate region into an active region and an isolation region and a second trench for partitioning said isolation region into a plurality of dummy semiconductor portions;a second step of filling an insulating material in each of said first and second trenches to form a first buried trench portion and a second buried trench portion;a third step of forming an element on said active region;a fourth step of introducing an impurity containing at least an impurity of a second conductivity type into said dummy semiconductor portions of said isolation region to form at least one PN junction in said dummy semiconductor portions;a fifth step of forming an interlayer insulating film over an entire surface of the substrate; anda sixth step of forming a wire on said interlayer insulating film.