Patent ID: 9721851
Date: 2017-08-01
CPC Classifications: H01L

Claim:
1. A method of forming a set of semiconductor fins, the method comprising: forming a base structure including a silicon substrate, a plurality of silicon semiconductor fins each stacked directly on the silicon substrate, and an insulator layer directly on the silicon substrate between each of the plurality of silicon semiconductor fins; depositing a first atomic layer of germanium atoms on a first set of semiconductor fins in the plurality of semiconductor fins; annealing the first atomic layer and the first set of semiconductor fins; forming, from the annealing, a first set of silicon-germanium semiconductor fins; depositing a second atomic layer of germanium atoms on the first set of silicon-germanium semiconductor fins; annealing the second atomic layer to the first set of silicon-germanium semiconductor fins; and forming, by the annealing, a second set of silicon-germanium semiconductor fins.