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    • 7. 发明申请
    • TRENCH CAPACITOR AND METHOD FOR MANUFACTURING THE SAME
    • TRENCH电容器及其制造方法
    • US20080213967A1
    • 2008-09-04
    • US12030883
    • 2008-02-14
    • Yi-Nan SuTa-Chuan Yeh
    • Yi-Nan SuTa-Chuan Yeh
    • H01L21/20H01L29/92
    • H01L29/66181H01L27/1087H01L27/10894H01L28/91H01L29/945
    • Method of manufacturing a trench capacitor includes providing a substrate having a memory array region and a logic region, performing a shallow trench isolation (STI) process for forming at least a STI in the substrate within each of the memory array regions and the logic regions, forming a patterned hard mask and the hard mask exposing a portion of the STI and a portion of the substrate surrounding the STI on the substrate, performing a first etching process to form first deep trenches through the patterned hard mask, performing a second etching process to form second deep trenches extending downwardly from the first deep trenches respectively, and forming a capacitor structure in each of the first deep trenches and the second deep trenches.
    • 制造沟槽电容器的方法包括提供具有存储器阵列区域和逻辑区域的衬底,执行用于在每个存储器阵列区域和逻辑区域内的衬底中至少形成STI的浅沟槽隔离(STI)工艺, 形成图案化的硬掩模,并且所述硬掩模暴露所述STI的一部分和围绕所述衬底上的所述STI的所述衬底的一部分,执行第一蚀刻工艺以形成穿过所述图案化硬掩模的第一深沟槽,执行第二蚀刻工艺 形成从第一深沟槽向下延伸的第二深沟槽,并且在第一深沟槽和第二深沟槽中的每一个中形成电容器结构。