Patent ID: 6683330
Filing Date: 2004-01-27
Classification: H01L

Abstract:
A semiconductor device including a thyristor and a substrate having an upper surface, wherein at least one region of the thyristor is in and defined by the substrate, the device comprising:a filled trench having a sidewall in the substrate and adjacent to the thyristor region; a dielectric material on a portion of the sidewall; and a control port in the trench and having an uppermost portion recessed below the surface of the substrate, the control port being adapted for capacitively coupling to the at least one thyristor region in the substrate via a portion of the dielectric material extending alongside the control port and below the uppermost portion thereof and for controlling current flow in the at least one thyristor region in the substrate, wherein the thyristor-based semiconductor device includes a species of ions implanted into a region adjacent to the upper surface and wherein the dielectric material portion extending alongside the control port and below the uppermost portion of the control port does not include the species of ions.