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Fabrication of high-aspect-ratio nanotips integrated with single-crystal silicon cantilevers

机译:高纵横比纳米尖端与单晶硅悬臂梁的集成

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This work presents a novel fabrication technique for an atomic force microscope ( AFM) nanotip. The high-aspect-ratio silicon nanotip on a single-crystal silicon cantilever was manufactured using inductive coupling plasma (ICP) anisotropic etching and XeF2 isotropic silicon etching processes. The cantilever shape was defined and the high-aspect-ratio silicon nanotip structure was fabricated by ICP anisotropic deep silicon etching (similar to 50 -80 mu m deep). Nanotip sharpening and single-crystal Si cantilever undercutting were achieved simultaneously via two-step XeF2 isotropic silicon etching. The final structures were observed by a scanning electron microscope ( SEM) and the diameter of the nanotip was about similar to 30 nm. This process is simple, easy to use, CMOS post-process-compatible and suitable for the future IC integrated AFM nanotip applications.
机译:这项工作提出了一种新的原子力显微镜(AFM)纳米尖端的制造技术。使用电感耦合等离子体(ICP)各向异性刻蚀和XeF2各向同性硅刻蚀工艺制造了单晶硅悬臂上高纵横比的硅纳米尖端。定义了悬臂的形状,并通过ICP各向异性深硅刻蚀(类似于50 -80μm的深)制造了高纵横比的硅纳米尖端结构。通过两步XeF2各向同性硅刻蚀,可以同时实现Nanotip锐化和单晶Si悬臂底切。通过扫描电子显微镜(SEM)观察最终结构,并且纳米尖端的直径大约类似于30nm。该过程简单,易用,与CMOS后处理兼容,适用于未来的IC集成AFM nanotip应用。

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