METHOD AND SYSTEM TO CONTROL POLISH RATE VARIATION INTRODUCED BY DEVICE DENSITY DIFFERENCES
    2.
    发明申请
    METHOD AND SYSTEM TO CONTROL POLISH RATE VARIATION INTRODUCED BY DEVICE DENSITY DIFFERENCES 审中-公开
    控制设备密度差异引起的波动率变化的方法和系统

    公开(公告)号:US20150179469A1

    公开(公告)日:2015-06-25

    申请号:US14137512

    申请日:2013-12-20

    IPC分类号: H01L21/3105 H01L21/311

    摘要: An embodiment includes forming a first film over first and second portions of a SOC, the first portion including a first density of structures and the second portion including a second density of structures with the first density being denser than the second density; forming a second film over the first film; polishing the second film to remove some of the second film and form (a) a first section of the second film between sections of the first film located over the first portion, and (b) a second section of the second film between sections of the second film located over the second portion; etching the first film over the first and second portions and etching the first and second sections of the second film; and polishing the first film to expose top surfaces of the structures of the first and second portions. Other embodiments are described herein.

    摘要翻译: 一个实施例包括在SOC的第一和第二部分上形成第一膜,第一部分包括第一密度结构,第二部分包括具有第一密度比第二密度致密的第二密度的结构; 在第一膜上形成第二膜; 抛光所述第二膜以去除所述第二膜中的一些,并且形成(a)所述第二膜的位于所述第一部分之上的所述第一膜的部分之间的第一部分,以及(b)所述第二膜的第二部分 第二膜位于第二部分之上; 在第一和第二部分上蚀刻第一膜并蚀刻第二膜的第一和第二部分; 并抛光第一膜以暴露第一和第二部分的结构的顶表面。 本文描述了其它实施例。