Patent ID: 7985632
Filing Date: 2011-07-26
Classification: B82Y,H01L,Y10S

Abstract:
1. A method for forming at least one wire in a layer based on at least one monocrystalline or amorphous material, comprising: forming at least two trenches in the layer, crossing through one face of the layer, separated from each other by at least one portion of the monocrystalline or amorphous layer that forms the wire, by an anisotropic etching of the layer on which is arranged an etching mask including a pattern forming sections of the trenches at least at a level of the face of the layer; and annealing, under hydrogenated atmosphere, the layer, the etching mask being maintained on the portion of the monocrystalline or amorphous layer that forms the wire during the annealing, wherein depths P of the two trenches in the layer are less than the thickness of the layer, and widths L of the sections of the two trenches and a width D of a section of the portion of the monocrystalline or amorphous layer, the sections of the two trenches and the portion of the monocrystalline or amorphous layer are in a plane parallel to the face of the layer, are such that the annealing eliminates a part of the portion of the monocrystalline or amorphous layer, the two trenches then forming a single trench in which a remaining part of the portion of the monocrystalline or amorphous layer forms the wire, and P, L, and D are chosen such that: