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Selective area growth of germanium and silicon-germanium in silicon waveguides for on-chip optical interconnect applications
Selective area growth of germanium and silicon-germanium in silicon waveguides for on-chip optical interconnect applications
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机译:片上光互连应用中硅波导中锗和硅锗的选择性面积增长
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摘要
A robust fabrication process for selective area growth of semiconductors in growth windows is provided. Sidewall growth is eliminated by the presence of a spacer layer which covers the sidewalls. Undesirable exposure of the top corners of the growth windows is prevented by undercutting the growth window prior to deposition of the dielectric spacer layer. The effectiveness of this process has been demonstrated by selective-area growth of Ge and Ge/SiGe quantum wells on a silicon substrate. Integration of active optoelectronic devices with waveguide layers via end-coupling through the dielectric spacer layer can be reliably accomplished in this manner.
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