采用CF4和Ar混合气体研究了新型相变材料Ti0.5Sb2Te3(TST)的刻蚀特性,重点优化和研究了刻蚀气体总流速、CF4/Ar的比例、压力和功率等工艺参数对刻蚀形貌的影响.结果表明,当气体总流量为50 sccm、CF4浓度为26％、刻蚀功率为400W和刻蚀压力为13.3 Pa时,刻蚀速度达到126 nm/min,TST薄膜刻蚀图形侧壁平整而且垂直度好(接近90°)、刻蚀表面平整(RMS为0.82 nm)以及刻蚀的片内均匀性等都非常好.
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