Patent ID: 6057580
Filing Date: 2000-05-02
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate;a gate insulating film provided on an upper surface of the semiconductor substrate;a gate electrode provided on an upper surface of the gate insulating film;a trench provided in the semiconductor substrate;a periphery insulating film provided on peripheral portions of the gate insulating film, the gate electrode, and the semiconductor substrate; anda plurality of element-isolating insulators buried in the trench, in which one of the element-isolating insulators is provided on a portion of the periphery insulating film, which portion corresponds to the gate insulating film, an interface between the gate insulating film and the gate electrode, and an interface between the gate insulating film and the semiconductor substrate, and in which said one element-isolating insulator is made of a material different from that of another of the element-isolating insulators.