Patent ID: 6503812
Filing Date: 2003-01-07
Classification: H01L

Abstract:
A process for fabricating a semiconductor substrate with at least one zone terminating in a top surface of the substrate, the zone includes two or more lateral edges and a bottom surrounded by an insulating material so as isolate the zone from. the substrate, the process comprising the steps of:forming a horizontal layer with a top surface in a substrate, the horizontal layer being formed from an insulating material and terminating in the top surface of the substrate; forming a semiconductor covering layer with a top surface over the top surface of the substrate and on the top surface of the horizontal layer; and forming a vertical layer from the insulating material in the semiconductor covering layer, the vertical layer being connected to the horizontal layer and terminating in the top surface of the semiconductor covering layer, whereby the semiconductor covering layer is bordered externally by the horizontal layer and the vertical layer of the insulating material so as to form a zone.