Patent ID: 7973326

Claim:
A semiconductor structure combination for the epitaxy of a semiconductor optoelectronic device, the semiconductor structure combination comprising: a substrate having an upper surface and a recess formed on the upper surface, wherein sidewalls of the recess provide a first site for the growth of a semiconductor material toward a first preferred orientation, a bottom of the recess provides a second site for the growth of the semiconductor material toward the first preferred orientation, and flat regions adjacent to the recess provide a third site for the growth of the semiconductor material toward the first preferred orientation; a plurality of first epitaxial crystals of the semiconductor material, being nucleated at the first site and growing toward the first preferred orientation under a first process condition, wherein the first epitaxial crystals have a first crystalline orientation which extends toward a center of the recess; a second epitaxial crystal of the semiconductor material, being nucleated at the second site and growing toward the first preferred orientation under the first process condition, wherein the second epitaxial crystal has a second crystalline orientation different from the first crystalline orientation; and a third epitaxial crystal of the semiconductor material, being nucleated at the third site and growing toward the first preferred orientation under the first process condition, wherein the third epitaxial crystal has a third crystalline orientation different from the first crystalline orientation; wherein under the first process condition, the growth of the second epitaxial crystal and the third epitaxial crystal inhibit the growth of the first epitaxial crystals, such that the first epitaxial crystals extend toward the center of the recess without contacting one another, and wherein the first epitaxial crystals are located between the second epitaxial crystal and the third epitaxial crystal.