硅原子层沉积制备低电阻率氮化钛薄膜

Cheng-Hsuan Kuo, V. Wang, Zichen Zhang, J. Spiegelman, D. Alvarez, A. Kummel, SeongUk Yun, H. Simka
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引用次数: 2

摘要

采用低温(300℃~ 350℃)四氯化钛(TiCl4)和无水肼制备了电阻率低于200 μ欧姆-cm的薄膜。采用氩等离子体和原子氢等表面处理,进一步减少了包括所有卤素在内的表面杂质。这些实验表明,使用超低本底氧化剂和高纯度前驱体的超净ALD工艺降低氧浓度是制备低电阻率TiN薄膜的关键。
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Low Resistivity Titanium Nitride Thin Film Fabricated by Atomic Layer Deposition on Silicon
A low temperature (300°C–350°C) TiN thermal ALD process using titanium tetrachloride (TiCl4) and anhydrous hydrazine was developed to yield films with resistivities below 200 μohm-cm. Surface treatments such as Ar plasma and atomic hydrogen were applied to further reduce the surface impurities including all halogens. These experiments indicate that minimizing oxygen concentration using an ultra-clean ALD process with minimum background oxidants and high purity precursors are keys in producing TiN thin films with low resistivity.
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