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    • 10. 发明申请
    • PLATEABLE DIFFUSION BARRIER TECHNIQUES
    • 可扩展扩展障碍技术
    • US20140019716A1
    • 2014-01-16
    • US13545910
    • 2012-07-10
    • Christopher J. Jezewski
    • Christopher J. Jezewski
    • H01L23/532G06F15/76G06F9/02H01L21/768
    • H01L23/53252H01L21/76843H01L21/76846H01L21/76871H01L23/53223H01L23/53238H01L23/53295H01L2924/0002H01L2924/00
    • Techniques are disclosed for forming a directly plateable diffusion barrier within an interconnect structure to prevent diffusion of interconnect fill metal into surrounding dielectric material and lower metal layers. The barrier can be used in back-end interconnect metallization processes and, in an embodiment, renders a seed layer unnecessary. In accordance with various example embodiments, the barrier can be implemented, for instance, as: (1) a single layer of ruthenium silicide (RuSix) or ruthenium silicide nitride (RuSixNy); (2) a bi-layer of Ru/RuSix, RuSix/Ru, Ru/RuSixNy, or RuSixNy/Ru; or (3) a tri-layer of Ru/RuSix/Ru or Ru/RuSixNy/Ru. In some embodiments, Si and/or N concentrations can be adjusted to alter the barrier's degree of diffusion protection, receptiveness to the fill metal, and/or electrical conductivity.
    • 公开了用于在互连结构内形成直接平板化扩散阻挡层的技术,以防止互连填充金属扩散到周围的电介质材料和下层金属层。 阻挡层可以用于后端互连金属化工艺中,并且在一个实施例中使得不需要种子层。 根据各种示例性实施例,阻挡层可以例如如下实现:(1)单层钌硅化物(RuSix)或氮化钌氮化物(RuSixNy); (2)Ru / RuSix,RuSix / Ru,Ru / RuSixNy或RuSixNy / Ru的双层; 或(3)Ru / RuSix / Ru或Ru / RuSixNy / Ru三层。 在一些实施方案中,可以调节Si和/或N浓度以改变屏障的扩散保护程度,对填充金属的接受性和/或导电性。