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Mitigating Curtaining Artifacts During Ga FIB TEM Lamella Preparation of a 14 nm FinFET Device
Published online by Cambridge University Press: 20 March 2017
Abstract
We report on the mitigation of curtaining artifacts during transmission electron microscopy (TEM) lamella preparation by means of a modified ion beam milling approach, which involves altering the incident angle of the Ga ions by rocking of the sample on a special stage. We applied this technique to TEM sample preparation of a state-of-the-art integrated circuit based on a 14-nm technology node. Site-specific lamellae with a thickness <15 nm were prepared by top-down Ga focused ion beam polishing through upper metal contacts. The lamellae were analyzed by means of high-resolution TEM, which showed a clear transistor structure and confirmed minimal curtaining artifacts. The results are compared with a standard inverted thinning preparation technique.
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- Materials Science Applications
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- © Microscopy Society of America 2017
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