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    • 5. 发明授权
    • Metallization process and method
    • 金属化过程和方法
    • US06169030A
    • 2001-01-02
    • US09007233
    • 1998-01-14
    • Mehul B. NaikTed GuoLiang-Yuh ChenRoderick Craig MoselyIsrael Beinglass
    • Mehul B. NaikTed GuoLiang-Yuh ChenRoderick Craig MoselyIsrael Beinglass
    • H01L2144
    • C23C14/32C23C14/025C23C14/046H01L21/2855H01L21/76877
    • The invention generally provides an improved process for providing uniform step coverage on a substrate and planarization of metal layers to form continuous, void-free interconnections in high aspect ratio, sub-half micron applications. The invention provides a multi-step PVD process in which the plasma power is varied for each of the steps to obtain favorable fill characteristics as well as good reflectivity, morphology and throughput. The initial plasma powers are relatively low to ensure good, void-free filling of the aperture and, then, the plasma powers are increased to obtain the desired reflectivity and morphology characteristics. The invention provides an aperture filling process comprising physical vapor depositing a metal over the substrate and varying the plasma power during the physical vapor deposition. Preferably, the plasma power is varied from a first discrete low plasma power to a second discrete high plasma power. Even more preferably, the plasma power is varied from a first discrete low plasma power to a second discrete low plasma power to a third discrete high plasma power.
    • 本发明通常提供了一种改进的方法,用于在衬底上提供均匀的台阶覆盖和金属层的平坦化,以在高纵横比,半微米应用中形成连续的无空隙互连。 本发明提供了一种多步骤PVD工艺,其中等离子体功率对于每个步骤而言是变化的,以获得良好的填充特性以及良好的反射率,形态和产量。 初始等离子体功率相对较低,以确保孔的良好的无空隙填充,然后增加等离子体功率以获得期望的反射率和形态特征。 本发明提供一种孔填充方法,其包括在物理气相沉积中物理气相沉积衬底上的金属并改变等离子体功率。 优选地,等离子体功率从第一离散低等离子体功率变化到第二离散高等离子体功率。 更优选地,等离子体功率从第一离散低等离子体功率变化到第二离散低等离子体功率到第三离散高等离子体功率。