Patent ID: 8394704

Claim:
A method for fabricating a dual-orientation group-IV semiconductor substrate, comprising the steps: providing a (100)-oriented group-IV semiconductor substrate and a (110)-oriented group-IV semiconductor surface layer on the substrate; performing a masked amorphization only in first lateral regions of the surface layer, in which first lateral regions a (100)-oriented surface is desired; performing a solid-phase epitaxial recrystallization of the surface layer in only the first lateral regions so as to establish their (100)-orientation; fabricating a cover layer on the surface layer; fabricating isolation regions, which extend from the surface of the cover layer towards the substrate at least to the surface layer and which laterally separate (100)-oriented first lateral regions and (110)-oriented second lateral regions from each other; removing the cover layer in a selective manner with respect to the isolation regions so as to uncover the first and second lateral regions; and refilling the first and second lateral regions between the isolation regions by performing an epitaxy of group-IV semiconductor material.