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    • 2. 发明申请
    • METHOD FOR MANUFACTURING DIELECTRIC MEMORY
    • 制造电介质存储器的方法
    • US20070287249A1
    • 2007-12-13
    • US11758376
    • 2007-06-05
    • Hiroshi YOSHIDAToyoji ITOYoshihisa NAGANO
    • Hiroshi YOSHIDAToyoji ITOYoshihisa NAGANO
    • H01L21/8242
    • H01L27/11507H01L27/11502H01L28/55H01L28/65
    • A method includes the steps of: forming a first insulation film on a substrate; forming a hole in the first insulation film; forming a lower electrode on a bottom surface and a sidewall surface of the hole; forming a capacitor insulation film on the lower electrode; forming a second conductive layer on the capacitor insulation film; forming a second insulation film on the second conductive layer so that the second insulation film fills a recess corresponding to the hole; forming a resist mask on the second insulation film so that the resist mask covers the recess; patterning the second insulation film by using the resist mask; and patterning the second conductive layer and the capacitor insulation film by using the patterned second insulation film as a hard mask. By dry etching using a hard mask, a dielectric capacitor having a three-dimensionally stacked structure can be formed with a high yield.
    • 一种方法包括以下步骤:在衬底上形成第一绝缘膜; 在第一绝缘膜上形成孔; 在所述孔的底表面和侧壁表面上形成下电极; 在下电极上形成电容绝缘膜; 在电容绝缘膜上形成第二导电层; 在所述第二导电层上形成第二绝缘膜,使得所述第二绝缘膜填充与所述孔对应的凹部; 在所述第二绝缘膜上形成抗蚀剂掩模,使得所述抗蚀剂掩模覆盖所述凹部; 通过使用抗蚀剂掩模来图案化第二绝缘膜; 以及通过使用图案化的第二绝缘膜作为硬掩模来图案化第二导电层和电容器绝缘膜。 通过使用硬掩模的干蚀刻,可以以高产率形成具有三维层叠结构的介电电容器。