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    • 30. 发明授权
    • Dual hardmask single damascene integration scheme in an organic low k ILD
    • 有机低k ILD中的双重硬掩模单镶嵌整体方案
    • US06638851B2
    • 2003-10-28
    • US09845305
    • 2001-05-01
    • Andy CowleyErdem KaltaliogluMichael Stetter
    • Andy CowleyErdem KaltaliogluMichael Stetter
    • H01L214763
    • H01L21/76802
    • Process of making a semiconductor using dual inorganic hardmask in single damascene process integration scheme in an organic low k interlayer dielectric (ILD) by: providing semiconductor substrate; depositing organic low k ILD layer on substrate; forming hardmask 1 on organic low k ILD layer and forming sacrificial hardmask 2 on hardmask 1; forming a patterned photoresist layer on sacrificial hardmask 2; etching selective to sacrificial hardmask 2 and stripping photoresist; etching of hardmask 1 in which the etch is selective to the organic low k ILD layer; depositing a liner or conformal barrier layer over the substrate, organic low k ILD layer, hardmask 1 and hardmask 2; forming a plated metal layer over the liner or conformal barrier layer; and removing metal layer and removing liner with simultaneous removal of sacrificial hardmask 2 so that facets in sacrificial hardmask 2 are removed during liner/sacrificial hardmask 2 removal.
    • 在有机低k层间电介质(ILD)中的单镶嵌工艺集成方案中使用双重无机硬掩模制造半导体的工艺:提供半导体衬底;在衬底上沉积有机低k ILD层;在有机低k ILD层上形成硬掩模1; 在硬掩模1上形成牺牲硬掩模2;在牺牲硬掩模2上形成图案化的光刻胶层;对牺牲硬掩模2进行选择性蚀刻和剥离光刻胶;蚀刻硬掩模1,其中蚀刻对有机低k ILD层是选择性的;沉积衬垫或 在衬底上的共形阻挡层,有机低k ILD层,硬掩模1和硬掩模2;在衬里或保形阻挡层上形成电镀金属层; 并移除金属层,同时去除牺牲性硬掩模2,从而在衬垫/牺牲硬掩模2移除期间去除牺牲硬掩模2中的刻面。