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采用磁增强反应离子刻蚀(MERIE)工艺获得了铁电PbZr053Ti047O3(PZT)薄膜的微细图形.研究了用CHF3 气体在不同射频功率和气体流量下PZT薄膜、Pt和AZ1450J光刻胶的刻蚀速率以及刻蚀选择性的实验规律.原子力显微镜(AFM)结果表明,获得的PZT薄膜图形具有较高的各向异性.化学分析电子能谱(ESCA)结果表明,在CHF3 等离子体中Pt表面形成了一层碳氟聚合物薄膜,它对Pt 的刻蚀起到钝化和保护的作用,并且最后可以在300℃热处理30m in 被消除.
The micro-patterning of ferroelectric PbZr053Ti047O3 (PZT) thin films was obtained by using magnetic enhanced reactive ion etching (MERIE). The experimental results of etching rate and etching selectivity of PZT thin films, Pt and AZ1450J photoresists with CHF3 gas at different RF power and gas flow rates were studied. Atomic force microscopy (AFM) results show that the obtained PZT film has high anisotropy. The results of ESCA showed that a film of fluorocarbon polymer was formed on Pt surface in CHF3 plasma, which could passivate and protect the Pt from being etched, and finally could be heat-treated at 300 ℃ 30m in is eliminated.