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    • 52. 发明申请
    • AIR GAP STRUCTURE DESIGN FOR ADVANCED INTEGRATED CIRCUIT TECHNOLOGY
    • 高级集成电路技术的空气隙结构设计
    • US20090081862A1
    • 2009-03-26
    • US11860122
    • 2007-09-24
    • Hsien-Wei ChenHao-Yi TsaiShin-Puu JengBenson Liu
    • Hsien-Wei ChenHao-Yi TsaiShin-Puu JengBenson Liu
    • H01L21/4763
    • H01L21/7682H01L21/76831
    • A method for forming air gaps between interconnect structures in semiconductor devices provides a sacrificial layer formed over a dielectric and within openings formed therein. The sacrificial layer is a blanket layer that is converted to a material that is consumable in an etchant composition that the dielectric material and a subsequently formed interconnect material are resistant to. After the interconnect material is deposited a planarized surface including portions of the dielectric material, vertical sections of the converted material and portions of the interconnect material is produced. The etchant composition then removes the converted material thereby forming voids. A capping layer is formed over the structure resulting in air gaps. A sidewall protection layer may be optionally formed between the interconnect structure and the sacrificial material. In some embodiments an ARC layer may be formed over the dielectric and form part of the planar surface.
    • 用于在半导体器件中的互连结构之间形成气隙的方法提供了形成在电介质上并在其内形成的开口内的牺牲层。 牺牲层是覆盖层,其被转化为在蚀刻剂组合物中消耗的材料,电介质材料和随后形成的互连材料是耐受的。 在互连材料沉积之后,包括介电材料的部分的平坦化表面,产生转换材料的垂直部分和互连材料的部分。 然后蚀刻剂组合物去除转化的材料,从而形成空隙。 在结构上形成覆盖层,导致气隙。 侧壁保护层可以可选地形成在互连结构和牺牲材料之间。 在一些实施例中,可以在电介质上形成ARC层并形成平面表面的一部分。