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    • 4. 发明专利
    • Bi-layer, tri-layer mask cd control
    • BI-LAYER,TRI-LAYER MASK CD CONTROL
    • JP2010109373A
    • 2010-05-13
    • JP2009251663
    • 2009-11-02
    • Lam Res Corpラム リサーチ コーポレーションLam Research Corporation
    • DELGADINO GERARDO AHEFTY ROBERT C
    • H01L21/3065H01L21/027
    • H01L21/76802H01L21/31138H01L21/31144
    • PROBLEM TO BE SOLVED: To provide a method for controlling the critical dimension (CD) of etch features in an etching layer in a stack formed by a patterned photoresist mask, an intermediate mask layer disposed below the photoresist mask, a functionalized organic mask layer disposed below the intermediate mask layer, and an etching layer disposed below the functionalized organic mask layer. SOLUTION: The intermediate mask layer 416 is opened by selectively etching the patterned photoresist mask 420. This opening operation in a functionalized organic mask layer 412 includes a step of flowing an opening gas containing COS, for generating plasma, and for stopping flowing the opening gas. Thereafter, the etching layer 408 is etched to a desired dimension. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种用于控制由图案化光致抗蚀剂掩模形成的叠层中的蚀刻层中的蚀刻特征的临界尺寸(CD)的方法,设置在光致抗蚀剂掩模下方的中间掩模层,官能化有机 掩模层,以及设置在官能化有机掩模层下方的蚀刻层。 解决方案:通过选择性地蚀刻图案化的光致抗蚀剂掩模420来打开中间掩模层416.官能化有机掩模层412中的该打开操作包括使包含COS的开口气体流动以产生等离子体并停止流动的步骤 开放气体。 此后,蚀刻层408被蚀刻到期望的尺寸。 版权所有(C)2010,JPO&INPIT