Patent ID: 7361592
Filing Date: 2008-04-22
Classification: H01L

Abstract:
1. Method for producing a component comprising at least one germanium-based element, the method comprising fabrication, on a substrate, of a stack of layers comprising at least one first layer made of germanium and silicon compound, the first layer being arranged between second layers, method wherein, the first layer made of germanium and silicon compound initially having a germanium concentration comprised between 10% and 50%, the second layers having germanium concentrations comprised between 0% and 10%, the method successively comprises: delineation by etching, in said stack, of a first zone corresponding to the germanium-based element and having at least a first lateral dimension comprised between 10 nm and 500 nm, and at least lateral thermal oxidization of the first zone, so that a silica layer forms on the surface of the first zone, and wherein, in the first layer, a central zone of condensed germanium forms, constituting the germanium-based element.