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    • 3. 发明申请
    • METHOD OF FABRICATING SELF-ALIGNED CONTACT PAD USING CHEMICAL MECHANICAL POLISHING PROCESS
    • 使用化学机械抛光工艺制作自对准接触垫的方法
    • US20100124817A1
    • 2010-05-20
    • US12694715
    • 2010-01-27
    • Ho-Young KIMChang-Ki HONGBo-Un YOONJoon-Sang PARK
    • Ho-Young KIMChang-Ki HONGBo-Un YOONJoon-Sang PARK
    • H01L21/3213H01L21/28
    • H01L21/76897H01L21/7684H01L27/10873H01L27/10885
    • A method of fabricating a self-aligned contact pad (SAC) includes forming stacks of a conductive line and a capping layer on a semiconductor substrate, spacers covering sidewalls of the stacks, and an insulation layer filling gaps between the stacks and exposing the top of the capping layer, etching the capping layer to form damascene grooves, forming a plurality of first etching masks with a material different from that of the capping layer to fill the damascene grooves without covering the top of the insulation layer, and forming a second etching mask having an opening region that exposes some of the first etching masks and a portion of the insulation layer located between the first etching masks. The method further includes etching the portion of the insulation layer exposed by the opening region using the first and second etching masks to form a plurality of opening holes, removing the second etching mask, forming a conductive layer filling the opening holes to cover the remaining first etching masks and performing a chemical mechanical polishing (CMP) process on the conductive layer using the capping layer as a polishing end point to remove the first etching masks such that a plurality of SAC pads separated from each other are formed that fill the opening holes.
    • 一种制造自对准接触焊盘(SAC)的方法包括在半导体衬底上形成导电线和覆盖层的叠层,覆盖堆叠的侧壁的间隔物和填充堆叠之间的间隙的绝缘层, 覆盖层,蚀刻覆盖层以形成镶嵌槽,用不同于覆盖层的材料形成多个第一蚀刻掩模以填充镶嵌槽而不覆盖绝缘层的顶部,以及形成第二蚀刻掩模 具有暴露一些第一蚀刻掩模的开口区域和位于第一蚀刻掩模之间的绝缘层的一部分。 该方法还包括使用第一和第二蚀刻掩模蚀刻由开口区域暴露的绝缘层的部分,以形成多个开孔,去除第二蚀刻掩模,形成填充开孔的导电层以覆盖剩余的第一 蚀刻掩模并使用覆盖层作为抛光终点在导电层上进行化学机械抛光(CMP)工艺,以去除第一蚀刻掩模,从而形成填充开孔的彼此分离的多个SAC焊盘。