摘要:采用统计实验方法研究了利用SF6/O2/CHF3混合气体产生的等离子体进行硅的反应离子刻蚀技术.为了优化刻蚀条件,将刻蚀速率和选择比表示为SF6、O2、CHF3各自的流量以及气压和射频功率的函数.文中讨论了各种变量的变化对刻蚀速率和选择比的影响以及刻蚀机理,证实了加入CHF3可以显著地减小表面粗糙的结论.
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