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    • 8. 发明申请
    • WIRING STRUCTURE AND METHOD
    • 接线结构和方法
    • US20110127673A1
    • 2011-06-02
    • US12628481
    • 2009-12-01
    • Felix P. AndersonThomas L. McDevittAnthony K. Stamper
    • Felix P. AndersonThomas L. McDevittAnthony K. Stamper
    • H01L23/532H01L21/768
    • H01L23/53238H01L21/76834H01L21/76883H01L2924/0002H01L2924/00
    • Disclosed is an improved integrated circuit wiring structure configured to prevent migration of wiring metal ions (e.g., copper (Cu+) ions in the case of a copper interconnect scheme) onto the surface of an interlayer dielectric material at an interface between the interlayer dielectric material and an insulating cap layer. Specifically, the top surfaces of wires and the top surface of a dielectric layer within which the wires sit are not co-planar. Thus, the interfaces between the wires and an insulating cap layer and between the dielectric layer and the same insulating cap layer are also not co-planar. Such a configuration physically prevents migration of wiring metal ions from the top surface of the wires onto the top surface of the dielectric layer at the interface between the dielectric layer and cap layer and, thereby prevents time dependent dielectric breakdown (TDDB) and eventual device failure. Also disclosed herein are embodiments of a method of a forming such an integrated circuit wiring structure.
    • 公开了一种改进的集成电路布线结构,其被配置为防止布线金属离子(例如在铜互连方案的情况下的铜(Cu +)离子)迁移到层间电介质材料的表面上,在层间电介质材料和 绝缘盖层。 具体地,电线的顶表面和电线所在的电介质层的顶表面不是共面的。 因此,电线和绝缘帽层之间以及电介质层和相同绝缘帽层之间的界面也不是共面的。 这种配置物理上防止布线金属离子从电介质顶表面在介电层和盖层之间的界面处迁移到电介质层的顶表面上,从而防止时间依赖的介质击穿(TDDB)和最终的器件故障 。 本文还公开了形成这种集成电路布线结构的方法的实施例。