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    • 5. 发明授权
    • Method of manufacturing a capacitor in a semiconductor device using a high dielectric tantalum oxide or barium strontium titanate material that is treated in an ozone plasma
    • 在使用在臭氧等离子体中处理的高介电钽氧化物或钛酸钡锶材料的半导体器件中制造电容器的方法
    • US06329237B1
    • 2001-12-11
    • US09466896
    • 1999-12-20
    • Kyong Min KimChan LimKil Ho LeeKi Seon Park
    • Kyong Min KimChan LimKil Ho LeeKi Seon Park
    • H01L218242
    • H01L21/31691C23C16/405C23C16/409C23C16/56H01L28/55
    • There is disclosed a method of making a high dielectric capacitor of a semiconductor device using Ta2O5, BST((Ba1−xSrx)TiO3) etc. of a high dielectric characteristic as a capacitor dielectric film in a very high integrated memory device. The present invention has its object to provide a method of manufacturing a high dielectric capacitor of a semiconductor device, which can effectively remove carbon contained within the thin film after deposition of the BST film and defects of oxygen depletion caused upon deposition of the thin film and which can also remove carbon contained within the thin film after deposition of the tantalum oxide film and defects of oxygen depletion caused upon deposition of the thin film, without further difficult processes or without any deterioration of the electrical characteristic of the capacitor. It employs the technology which is able to effectively removing defects of carbon and oxygen depletion within the thin film, by forming a plasma O3 gas having a good reactivity and by processing the plasma for the BST thin film and tantalum oxide film. Thus, it can extend the lifetime of the activated oxygen of oxygen, which had been a problem in processing a conventional UV-O3, by means of plasma process using O3 gas. Therefore, it can effectively remove defects of carbon and oxygen within the BST thin film and tantalum oxide film without complicating the process or deteriorating the electrical characteristic of the capacitor. The present invention also proposes a detailed process condition, which can optimize the plasma process using O3 gas.
    • 公开了在非常高的集成存储器件中使用具有高介电特性的Ta2O5,BST((Ba1-xSrx)TiO3)等作为电容器电介质膜的半导体器件的高介电电容器的方法。 本发明的目的是提供一种制造半导体器件的高介电电容器的方法,其可以有效地去除沉积BST膜之后的薄膜中包含的碳和沉积薄膜时引起的氧耗损缺陷, 其也可以在沉积氧化钽膜之后,除去薄膜中所含的碳和沉积薄膜所引起的氧耗尽的缺陷,而不需要进一步的困难处理或不会使电容器的电特性恶化。 通过形成具有良好反应性的等离子体O 3气体和通过处理BST薄膜和氧化钽膜的等离子体,采用能够有效地去除薄膜内的碳和氧缺乏的缺陷的技术。 因此,通过使用O 3气体的等离子体处理,可以延长氧气的活化氧的寿命,这在处理常规的UV-O 3中是一个问题。 因此,可以有效地去除BST薄膜和氧化钽膜内的碳和氧的缺陷,而不会使工艺复杂化或劣化电容器的电特性。 本发明还提出了一种详细的工艺条件,其可以优化使用O 3气体的等离子体工艺。