Patent ID: 6600189
Filing Date: 2003-07-29
Classification: H01L,Y10S

Abstract:
A semiconductor device comprising:a semiconductor substrate having a trench with an aspect ratio of 10 or more on a surface thereof; and an embedding member embedding an interior of said trench therewith, wherein while a section of said trench when cut by a first plane perpendicular to a direction of a depth of said trench at a position away from a bottom of said trench by a distance corresponding to &frac45; of the depth of said trench in a direction of said surface is defined as a first section and a section of said trench when cut by a second plane perpendicular to the direction of the depth of said trench at a position away from the bottom of said trench by a distance corresponding to &frac15; of the depth of said trench in the direction of said surface is defined as a second section, a value obtained by dividing a major diameter of said second section by a minor diameter of said second section is smaller than a value obtained by dividing a major diameter of said first section by a minor diameter of said first section.