標題: Growth of GaAs epitaxial layers on Si substrate by using a novel GeSi buffer layer
作者: Chang
Edward Y.
Luo
Guangli
Yang
Tsung Hsi
Chang
Chung Yen
公開日期: 21-Aug-2007
摘要: This invention provides a process for growing Ge epitaxial layers on Si substrate by using ultra-high vacuum chemical vapor deposition (UHVCVD), and subsequently growing a GaAs layer on Ge film of the surface of said Ge epitaxial layers by using metal organic chemical vapor deposition (MOCVD).The process comprises steps of, firstly, pre-cleaning a silicon wafer in a standard cleaning procedure, dipping it with HF solution and prebaking to remove its native oxide layer. Then, growing a high Ge-composition epitaxial layer, such as Si0.1Ge0.9in a thickness of 0.8 μm on said Si substrate by using ultra-high vacuum chemical vapor deposition under certain conditions. Thus, many dislocations are generated and located near the interface and in the low of part of Si01.Ge0.9due to the large mismatch between this layer and Si substrate.Furthermore, a subsequent 0.8 μm Si0.05Ge0.95layer, and/or optionally a further 0.8 μm Si0.02Ge0.98layer, are grown. They form strained interfaces of said layers can bend and terminate the propagated upward dislocation very effectively. Therefore, a film of pure Ge is grown on the surface of said epitaxial layers.Finally, a GaAs epitaxial layer is grown on said Ge film by using MOCVD.
官方說明文件#: H01L021/28
H01L021/3205
URI: http://hdl.handle.net/11536/104787
專利國: USA
專利號碼: 07259084
Appears in Collections:Patents


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