Patent ID: 7781315

Claim:
A process for realizing a finFET field effect transistor on a substrate of an integrated electronic circuit, comprising the following steps: forming a mask on a surface of the substrate, with said mask comprising an opening located above a part of an active portion of the substrate; realizing an implantation of doping particles through the mask opening into said exposed part of the active portion of the substrate, so as to create in said exposed part of the active portion, an electrical doping of a first type; and forming, by epitaxial growth from the part of the active portion which is exposed in the mask opening, a thin fin portion of crystalline semiconductor material comprising at least the channel of the transistor, the crystalline semiconductor material being doped with a second type of doping opposite the first type forming an insulating electrical junction with the first type doped part of the active portion of the substrate, the channel having an electrical direction of conduction parallel to the surface of the substrate and a height perpendicular to the surface of the substrate.