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利用SiCl4/Ar/H2气体ICP干法刻蚀GaAs材料

DOI: 10.11830/ISSN.1000-5013.2013.02.0139

Keywords: GaAs, 干法刻蚀, 电感耦合等离子体, SiCl4, 光滑表面

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Abstract:

利用SiCl4/Ar/H2气体的电感耦合等离子体(ICP)干法刻蚀GaAs材料,研究反应气体流量、样品室压力、源功率RF1和RF2等参数对刻蚀速率的影响.结果表明:在反应气体SiCl4,Ar和H2的流量分别为2,4,1 mL?min-1,样品室压力为0.400 Pa,RF1和RF2的功率分别为120,500 W的最佳优化参数下,得到的刻蚀速率为486 nm?min-1,且同时满足垂直而光滑的台面.利用该优化后的配方刻蚀GaAs衬底10 min后,得到大面积的光滑表面,其粗糙度为0.20 nm.

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