Patent ID: 9748098
Date: 2017-08-29
CPC Classifications: H01L

Claim:
1. A method of forming a semiconductor structure comprising: forming dielectric material layer over a sacrificial semiconductor layer that is located over a region of an insulator layer, wherein the sacrificial semiconductor layer comprises silicon-germanium having a high germanium concentration; forming a first trench opening extending through the dielectric material layer and the sacrificial semiconductor layer, wherein the first trench opening exposes a first sidewall of the sacrificial semiconductor layer; forming a seed layer over the first sidewall of the sacrificial semiconductor layer; forming a second trench opening extending through the dielectric material layer and the sacrificial semiconductor layer, wherein the second trench opening exposes a second sidewall of the sacrificial semiconductor layer opposite to the first sidewall; removing the sacrificial semiconductor layer to provide a trench, wherein the trench exposes a sidewall surface of the seed layer; growing a III-V compound semiconductor material within the trench and laterally outwards from the sidewall surface of the seed layer to provide a III-V compound semiconductor layer; and removing a defect-containing region of the III-V compound semiconductor layer.