Damascene integration scheme for developing metal-insulator-metal capacitors
    33.
    发明授权
    Damascene integration scheme for developing metal-insulator-metal capacitors 有权
    用于开发金属 - 绝缘体 - 金属电容器的大马士革集成方案

    公开(公告)号:US06992344B2

    公开(公告)日:2006-01-31

    申请号:US10319724

    申请日:2002-12-13

    IPC分类号: H01L27/108

    摘要: The invention is directed to unique high-surface area BEOL capacitor structures with high-k dielectric layers and methods for fabricating the same. These high-surface area BEOL capacitor structures may be used in analog and mixed signal applications. The capacitor is formed within a trench with pedestals within the trench to provide additional surface area. The top and bottom electrodes are created using damascene integration scheme. The dielectric layer is created as a multilayer dielectric film comprising for instance Al2O3, Al2O3/Ta2O5, Al2O3/Ta2O5/Al2O3 and the like. The dielectric layer may be deposited by methods like atomic layer deposition or chemical vapor deposition. The dielectric layer used in the capacitor may also be produced by anodic oxidation of a metallic precursor to yield a high dielectric constant oxide layer.

    摘要翻译: 本发明涉及具有高k电介质层的独特的高表面积BEOL电容器结构及其制造方法。 这些高表面积BEOL电容器结构可用于模拟和混合信号应用。 电容器形成在具有沟槽内的基座的沟槽内,以提供额外的表面积。 顶部和底部电极使用大马士革集成方案创建。 电介质层被形成为多层电介质膜,该多层电介质膜包括例如Al 2 O 3 O 3,Al 2 O 3 O 3, / Ta 2 O 5,O 2 O 3 / Ta 2 O 2, 2/3/3/3等等。 电介质层可以通过诸如原子层沉积或化学气相沉积的方法沉积。 电容器中使用的电介质层也可以通过金属前体的阳极氧化产生高介电常数氧化物层。