High performance MIS capacitor with HfO2 dielectric
    2.
    发明授权
    High performance MIS capacitor with HfO2 dielectric 失效
    具有HfO2电介质的高性能MIS电容器

    公开(公告)号:US07094712B2

    公开(公告)日:2006-08-22

    申请号:US10793818

    申请日:2004-03-08

    IPC分类号: H01L21/31

    摘要: Disclosed is a method for forming metal oxide dielectric layers, more particularly HfO2 dielectric layers, using an atomic layer deposition (ALD) method in which a series of thin intermediate layers are formed and treated with one or more oxidizers and nitrogents before the next intermediate layer is formed on the substrate. The intermediate oxidation treatments reduce the number of organic contaminants incorporated into the metal oxide layer from the organometallic precursors to produce a dielectric layer having improved current leakage characteristics. The dielectric layers formed in this manner remain susceptible to crystallization if exposed to temperatures much above 550° C., so subsequent semiconductor manufacturing processes should be modified or eliminated to avoid such temperatures or limit the duration at such temperatures to maintain the performance of the dielectric materials.

    摘要翻译: 公开了一种使用原子层沉积(ALD)方法形成金属氧化物电介质层,更具体地是HfO 2 电介质层的方法,其中形成一系列薄的中间层并用一个或多个 在下一个中间层之前形成氧化剂和氮。 中间氧化处理减少了从有机金属前体引入到金属氧化物层中的有机污染物的数量,以产生具有改善的电流泄漏特性的电介质层。 如果暴露在高于550℃的温度下,以这种方式形成的电介质层仍然易于结晶,因此随后的半导体制造工艺应当被修改或消除以避免这种温度或限制在这样的温度下的持续时间以保持电介质的性能 材料