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    • 5. 发明申请
    • SEMICONDUCTOR MEMORY DEVICE AND METHOD FOR MANUFACTURING THE SAME
    • 半导体存储器件及其制造方法
    • US20130020629A1
    • 2013-01-24
    • US13557295
    • 2012-07-25
    • Kyoko ANDOSatoshi NAGASHIMAKenji AOYAMA
    • Kyoko ANDOSatoshi NAGASHIMAKenji AOYAMA
    • H01L29/788
    • H01L29/42324H01L21/76229H01L27/105H01L27/11526H01L27/11529H01L29/66825H01L29/7883
    • According to one embodiment, a semiconductor memory device includes a plurality of word lines formed on a semiconductor substrate at predetermined intervals, selecting transistors arranged on at least one side of the plurality of word lines, an interlayer insulating film formed to cover upper surfaces of the word lines and the selecting transistors, a first air gap located between each pair of adjacent ones of the word lines and covered by the interlayer insulating film, a second air gap located at a first side wall portion of a word line adjacent to the selecting transistors covered by the interlayer insulating film, the first side wall portion facing the selecting transistors, and a third air gap located at a second side wall portion of each of the selecting transistors and covered by the interlayer insulating film. The first, second, and third air gaps are filled with air.
    • 根据一个实施例,半导体存储器件包括以预定间隔形成在半导体衬底上的多个字线,选择排列在多个字线的至少一侧的晶体管,形成为覆盖所述多个字线的上表面的层间绝缘膜 字线和选择晶体管,位于每对相邻字线之间并由层间绝缘膜覆盖的第一气隙,位于与选择晶体管相邻的字线的第一侧壁部分处的第二气隙 被层间绝缘膜覆盖,面向选择晶体管的第一侧壁部分和位于每个选择晶体管的第二侧壁部分并被层间绝缘膜覆盖的第三气隙。 第一,第二和第三气隙充满空气。