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    • 3. 发明授权
    • Self-aligned pitch reduction
    • 自对准螺距减小
    • US07390749B2
    • 2008-06-24
    • US11558238
    • 2006-11-09
    • Ji Soo KimSangheon LeeDaehan ChoiS. M. Reza Sadjadi
    • Ji Soo KimSangheon LeeDaehan ChoiS. M. Reza Sadjadi
    • H01L21/311
    • H01L21/0338H01L21/0337H01L21/31144
    • A method for providing features in an etch layer with a memory region and a peripheral region is provided. A memory patterned mask is formed over a first sacrificial layer. A first set of sacrificial layer features is etched into the first sacrificial layer and a second sacrificial layer. Features of the first set of sacrificial layer features are filled with filler material. The first sacrificial layer is removed. The spaces are shrunk with a shrink sidewall deposition. A second set of sacrificial layer features is etched into the second sacrificial layer. The filler material and shrink sidewall deposition are removed. A peripheral patterned mask is formed over the memory region and peripheral region. The second sacrificial layer is etched through the peripheral patterned mask. The peripheral patterned mask is removed. Features are etched into the etch layer from the second sacrificial layer.
    • 提供了一种用于在具有存储区域和周边区域的蚀刻层中提供特征的方法。 存储器图案化掩模形成在第一牺牲层上。 第一组牺牲层特征被蚀刻到第一牺牲层和第二牺牲层中。 第一组牺牲层特征的特征填充有填充材料。 第一牺牲层被去除。 这些空间随着收缩侧壁沉积而收缩。 第二组牺牲层特征被蚀刻到第二牺牲层中。 去除填充材料和收缩侧壁沉积。 在存储器区域和外围区域上形成周边图案化掩模。 通过外围图案化掩模蚀刻第二牺牲层。 去除周边图案掩模。 特征从第二牺牲层蚀刻到蚀刻层中。
    • 7. 发明授权
    • Sidewall forming processes
    • 侧壁成型工艺
    • US07772122B2
    • 2010-08-10
    • US12233517
    • 2008-09-18
    • Peter CiriglianoHelen ZhuJi Soo KimS. M. Reza Sadjadi
    • Peter CiriglianoHelen ZhuJi Soo KimS. M. Reza Sadjadi
    • H01L21/311
    • H01L21/0337H01L21/31144H01L21/312
    • An etch layer underlying a patterned photoresist mask is provided. A plurality of sidewall forming processes are performed. Each sidewall forming process comprises depositing a protective layer on the patterned photoresist mask by performing multiple cyclical depositions. Each cyclical deposition involves at least a depositing phase for depositing a deposition layer over surfaces of the patterned photoresist mask and a profile shaping phase for shaping vertical surfaces in the deposition layer. Each sidewall forming process further comprises a breakthrough etch for selectively etching horizontal surfaces of the protective layer with respect to vertical surfaces of the protective layer. Afterwards, the etch layer is etched to form a feature having a critical dimension that is less than the critical dimension of the features in the patterned photoresist mask.
    • 提供了图案化光刻胶掩模下面的蚀刻层。 执行多个侧壁形成工序。 每个侧壁形成工艺包括通过执行多个循环沉积在图案化的光致抗蚀剂掩模上沉积保护层。 每个循环沉积涉及至少沉积阶段,用于在图案化的光致抗蚀剂掩模的表面上沉积沉积层,以及用于在沉积层中形成垂直表面的轮廓成形阶段。 每个侧壁形成工艺还包括用于相对于保护层的垂直表面选择性地蚀刻保护层的水平表面的穿透蚀刻。 之后,刻蚀蚀刻层以形成临界尺寸小于图案化光致抗蚀剂掩模中特征的临界尺寸的特征。