Patent ID: 6191450
Filing Date: 2001-02-20
Classification: H01L

Abstract:
A semiconductor device having a field-shield isolation structure selectively formed on an upper surface of a semiconductor substrate, said field-shield isolation structure comprising:an insulating film formed on the upper surface of said semiconductor substrate;a field-shield electrode formed on an upper surface of said insulating film over a boundary region that separates element regions of the semiconductor device, said boundary region including a region formed on opposite sides of a channel covered by a conduction controlling gate electrode, with no channel being formed on said region;an oxidation-resistant film formed so as to cover an upper surface of said field-shield electrode;a first oxide film covering an upper surface of said oxidation-resistant film; anda second oxide film directly contacting side surfaces of said first oxide film, said oxidation-resistant film, and said field-shield electrode,wherein said field-shield isolation structure is configured to electrically isolate the element regions from each other.