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    • 4. 发明授权
    • SOI deep trench capacitor employing a non-conformal inner spacer
    • SOI深沟槽电容器采用非保形内隔板
    • US07791124B2
    • 2010-09-07
    • US12124186
    • 2008-05-21
    • Kangguo ChengHerbert L. HoPaul C. ParriesGeng Wang
    • Kangguo ChengHerbert L. HoPaul C. ParriesGeng Wang
    • H01L27/108
    • H01L29/945H01L21/84H01L27/1087H01L27/1203H01L29/66181
    • A bottle shaped trench for an SOI capacitor is formed by a simple processing sequence. A non-conformal dielectric layer with an optional conformal dielectric diffusion barrier layer underneath is formed on sidewalls of a deep trench. Employing an isotropic etch, the non-conformal dielectric layer is removed from a bottom portion of the deep trench, leaving a dielectric spacer covering sidewalls of the buried insulator layer and the top semiconductor layer. The bottom portion of the deep trench is expanded to form a bottle shaped trench, and a buried plated is formed underneath the buried insulator layer. The dielectric spacer may be recessed during formation of a buried strap to form a graded thickness dielectric collar around the upper portion of an inner electrode. Alternately, the dielectric spacer may be removed prior to formation of a buried strap.
    • 用于SOI电容器的瓶形沟槽通过简单的处理顺序形成。 在深沟槽的侧壁上形成具有可选的适形电介质扩散阻挡层的非保形介电层。 采用各向同性蚀刻,从深沟槽的底部去除非共形电介质层,留下覆盖掩埋绝缘体层和顶部半导体层的侧壁的电介质间隔物。 深沟槽的底部被膨胀以形成瓶形沟槽,并且在掩埋绝缘体层的下方形成埋入的电镀层。 在形成掩埋带的过程中,电介质间隔物可以是凹陷的,以形成围绕内电极的上部的分级厚度的介质环。 或者,可以在形成掩埋带之前去除电介质间隔物。
    • 6. 发明申请
    • SOI DEEP TRENCH CAPACITOR EMPLOYING A NON-CONFORMAL INNER SPACER
    • SOI深层电容器采用不合格的内部间隔器
    • US20090289291A1
    • 2009-11-26
    • US12124186
    • 2008-05-21
    • Kangguo ChengHerbert L. HoPaul C. ParriesGeng Wang
    • Kangguo ChengHerbert L. HoPaul C. ParriesGeng Wang
    • H01L29/94H01L21/20
    • H01L29/945H01L21/84H01L27/1087H01L27/1203H01L29/66181
    • A bottle shaped trench for an SOI capacitor is formed by a simple processing sequence. A non-conformal dielectric layer with an optional conformal dielectric diffusion barrier layer underneath is formed on sidewalls of a deep trench. Employing an isotropic etch, the non-conformal dielectric layer is removed from a bottom portion of the deep trench, leaving a dielectric spacer covering sidewalls of the buried insulator layer and the top semiconductor layer. The bottom portion of the deep trench is expanded to form a bottle shaped trench, and a buried plated is formed underneath the buried insulator layer. The dielectric spacer may be recessed during formation of a buried strap to form a graded thickness dielectric collar around the upper portion of an inner electrode. Alternately, the dielectric spacer may be removed prior to formation of a buried strap.
    • 用于SOI电容器的瓶形沟槽通过简单的处理顺序形成。 在深沟槽的侧壁上形成具有可选的适形电介质扩散阻挡层的非保形介电层。 采用各向同性蚀刻,从深沟槽的底部去除非共形电介质层,留下覆盖掩埋绝缘体层和顶部半导体层的侧壁的电介质间隔物。 深沟槽的底部被膨胀以形成瓶形沟槽,并且在掩埋绝缘体层的下方形成埋入的电镀层。 在形成掩埋带的过程中,电介质间隔物可以是凹陷的,以形成围绕内电极的上部的分级厚度的介质环。 或者,可以在形成掩埋带之前去除电介质间隔物。