Patent ID: 9255345
Filing Date: 2016-02-09
CPC Classification: C30B,H01L

Claim Text:
1. A method of growing a germanium/silicon-germanium superlattice structure (SLS) comprising the steps of: (a) preconditioning a silicon substrate with hydrogen gas with a pressure at most equal to approximately 3E (b) reducing temperature and pressure; (c) providing germane gas with a pressure at most equal to approximately 5E (d) heating in approximately a vacuum; (e) flowing gasses with a pressure at most equal to approximately 5E (f) flowing germane gas with a pressure at most equal to approximately 5E (g) flowing at least germane gas over said first buffer with a pressure at most equal to approximately 5E (h) flushing with hydrogen or allowing to remain idle; (i) flowing at least one gas over said single-crystal comprising at least germanium layer with a pressure at most approximately 5E (j) flushing with hydrogen or allowing to remain idle; (k) repeating said steps (g) through (j) multiple times, forming SLS layers, wherein silicon content of alternate layers varies; (l) flowing germane gas with a pressure at most equal to approximately 5E (m) flowing gasses with a pressure at most equal to approximately 5E