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    • 7. 发明申请
    • Method of manufacturing a nonvolatile semiconductor memory device
    • 制造非易失性半导体存储器件的方法
    • US20050287742A1
    • 2005-12-29
    • US11168178
    • 2005-06-27
    • Yun-Seung Kang
    • Yun-Seung Kang
    • H01L21/336H01L21/8247H01L27/115
    • H01L27/11521H01L27/115
    • In a method of manufacturing a nonvolatile semiconductor memory device, a preliminary floating gate is formed on a substrate having an active region and an inactive region that extend in a first direction. A dielectric layer and a control gate layer are formed on the substrate. A control gate, a dielectric layer, and a remaining pattern structure are formed by etching the control gate layer and the dielectric layer in a second direction until the preliminary floating gate is partially exposed. The floating gate is formed by etching the preliminary floating gate and the remaining pattern structure until the silicon substrate is exposed. The remaining pattern structure may prevent the isolation layer defining the inactive region from being damaged, thereby suppressing a leakage current in the nonvolatile semiconductor memory device.
    • 在制造非易失性半导体存储器件的方法中,在具有在第一方向上延伸的有源区和非活性区的衬底上形成预备浮栅。 在基板上形成介电层和控制栅极层。 通过在第二方向上蚀刻控制栅极层和电介质层直到预置浮栅部分露出来形成控制栅极,电介质层和剩余图案结构。 通过蚀刻初步浮栅和剩余的图案结构直到硅衬底露出来形成浮栅。 剩余的图案结构可以防止限定非活性区域的隔离层被损坏,从而抑制非易失性半导体存储器件中的漏电流。