Patent ID: 9634185
Date: 2017-04-25
CPC Classifications: H01L

Claim:
1. A method for manufacturing an optical semiconductor device, comprising: providing a substrate comprising a layer of semiconductor material, wherein the semiconductor material has a diamond-cubic structure; patterning the layer of semiconductor material having the diamond-cubic structure to form a fin sandwiched between a first confined space and a second confined space, the first confined space being adjacent to a first major sidewall of the fin and the second confined space being adjacent to a second major sidewall of the fin, whereby the first confined space and the second confined space comprise an oxide material in contact with the first major sidewall and the second major sidewall, wherein the first confined space is smaller than the second confined space; and annealing the substrate, thereby forming at the base of the fin and across a full width of the fin a slab of semiconductor material having a diamond-hexagonal structure.