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    • 3. 发明申请
    • REDUCTION OF ETCH MASK FEATURE CRITICAL DIMENSIONS
    • 减少蚀刻特征的关键尺寸
    • WO2006065630A3
    • 2007-04-12
    • PCT/US2005044505
    • 2005-12-06
    • LAM RES CORPHUANG ZHISONGSADJADI S M REZAMARKS JEFFREY
    • HUANG ZHISONGSADJADI S M REZAMARKS JEFFREY
    • H01L21/311H01L21/00H01L21/308
    • H01L21/67069H01L21/0337H01L21/0338H01L21/31144
    • A method for forming features in an etch layer in an etch stack with an etch mask over the etch layer, wherein the etch mask has etch mask features with sidewalls, where the etch mask features have a first critical dimension, is provided. A cyclical critical dimension reduction is performed to form deposition layer features with a second critical dimension, which is less than the first critical dimension. Each cycle, comprises a depositing phase for depositing a deposition layer over the exposed surfaces, including the vertical sidewalls, of the etch mask features and an etching phase for etching back the deposition layer leaving a selective deposition on the vertical sidewalls. Features are etched into the etch layer, wherein the etch layer features have a third critical dimension, which is less than the first critical dimension.
    • 一种用于在蚀刻层上的蚀刻层中形成蚀刻层中的特征的方法,其中蚀刻掩模具有带侧壁的蚀刻掩模特征,其中蚀刻掩模特征具有第一临界尺寸。 执行周期性临界尺寸降低以形成具有小于第一临界尺寸的第二临界尺寸的沉积层特征。 每个循环包括沉积相,用于在包括垂直侧壁的蚀刻掩模特征的暴露表面上沉积沉积层,以及用于蚀刻回沉积层的蚀刻阶段,在垂直侧壁上留下选择性沉积。 将特征蚀刻到蚀刻层中,其中蚀刻层特征具有小于第一临界尺寸的第三临界尺寸。