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    • 10. 发明授权
    • Semiconductor formation method that utilizes multiple etch stop layers
    • 利用多个蚀刻停止层的半导体形成方法
    • US07572727B1
    • 2009-08-11
    • US10934828
    • 2004-09-02
    • Wenmei LiAngela T. HuiDawn HopperKouros Ghandehari
    • Wenmei LiAngela T. HuiDawn HopperKouros Ghandehari
    • H01L21/4763
    • H01L21/76816H01L21/76804H01L21/76829H01L21/76831H01L23/485H01L2924/0002H01L2924/00
    • The present invention is a semiconductor contact formation system and method. Contact insulation regions are formed with multiple etch stop sublayers that facilitate formation of contacts. This contact formation process provides relatively small substrate connections while addressing critical lithographic printing limitation concerns in forming contact holes with small dimensions. In one embodiment, a multiple etch stop insulation layer comprising multiple etch stop layers is deposited. A contact region is formed in the multiple etch stop insulation layer by selectively removing (e.g., etching) some of the multiple etch stop insulation layer. In one embodiment, a larger portion of the multiple etch stop insulation layer is removed close to the metal layer and a smaller portion is removed closer to the substrate. The different contact region widths are achieved by performing multiple etching processes controlled by the multiple etch stop layers in the multiple etch stop insulation layer and spacer formation to shrink contact size at a bottom portion. Electrical conducting material (e.g., tungsten) is deposited in the contact region.
    • 本发明是一种半导体接触形成系统和方法。 接触绝缘区域形成有多个有助于形成接触的蚀刻停止子层。 该接触形成工艺提供了相对较小的衬底连接,同时解决了形成具有小尺寸的接触孔的关键平版印刷限制问题。 在一个实施例中,沉积包括多个蚀刻停止层的多次蚀刻停止绝缘层。 通过选择性地去除(例如,蚀刻)多个蚀刻停止绝缘层中的一些,在多个蚀刻停止绝缘层中形成接触区域。 在一个实施例中,多个蚀刻停止绝缘层的较大部分被去除在金属层附近,并且更靠近基底的部分被去除。 通过在多个蚀刻停止绝缘层中由多个蚀刻停止层控制的多个蚀刻工艺和间隔物形成以在底部收缩接触尺寸来实现不同的接触区域宽度。 导电材料(例如,钨)沉积在接触区域中。