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    • 16. 发明申请
    • Method for Manufacturing Interconnect Structures Incorporating Air-Gap Spacers
    • 制造连接结构的空气间隙隔离器的方法
    • US20090075470A1
    • 2009-03-19
    • US11855280
    • 2007-09-14
    • Satya V. NittaShom Ponoth
    • Satya V. NittaShom Ponoth
    • H01L21/4763
    • H01L21/76808H01L21/31144H01L21/7682H01L2221/1063
    • Methods for manufacturing air-gap (e.g., side wall air-gap) containing metal/insulator interconnect structures for Very Large Scale Integrated (VLSI) and Ultra Large Scale Integrated (ULSI) devices and packaging comprise forming the air-gap spacers by deviating from a conventional dual-damascene etch process in order to avoid damage to the dielectric, and instead utilize intentional and controlled chemical damage of the Si, C, O, H containing dielectric by appropriate strip/ash etch chemistries after the trench etch and/or after via etch. The damaged dielectric layer is left in place after etch and the stack is taken through metallization and chemical mechanical planarization (CMP) processes. Subsequent to this, selective removal of the oxide-like damaged layer takes place by exposure to appropriate chemistries such as dilute HF, leaving behind air-gap spacers. Pinch-off cap deposition ensures integration of the air-gap for narrow air-gaps or perforated caps for wide air-gaps.
    • 用于制造用于超大规模集成(VLSI)和超大规模集成(ULSI)装置和包装的含有金属/绝缘体互连结构的气隙(例如,侧壁气隙)的方法包括通过偏离 常规的双镶嵌蚀刻工艺,以避免损坏电介质,而是在沟槽蚀刻之后和/或之后通过适当的带/灰蚀刻化学处理使用含有Si,C,O,H的电介质的有意和受控的化学损伤 通过蚀刻。 蚀刻后损坏的介电层留在原位,堆叠通过金属化和化学机械平面化(CMP)工艺。 此后,通过暴露于适当的化学物质(例如稀HF),留下气隙间隔物,可以选择性除去氧化物样损伤层。 夹断盖沉积确保了用于宽气隙的窄气隙或穿孔盖的气隙的集成。