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    • 10. 发明申请
    • Nonvolatile memory device and method of fabricating the same
    • 非易失性存储器件及其制造方法
    • US20090045455A1
    • 2009-02-19
    • US12219465
    • 2008-07-23
    • Kwang-soo SeolSang-jin ParkSang-moo ChoiHyo-sug LeeJung-hun Sung
    • Kwang-soo SeolSang-jin ParkSang-moo ChoiHyo-sug LeeJung-hun Sung
    • H01L29/792H01L21/28
    • H01L29/4234H01L29/40117H01L29/513H01L29/66833
    • Example embodiments relate to nonvolatile semiconductor memory devices using an electric charge storing layer as a storage node and fabrication methods thereof. An electric charge trap type nonvolatile memory device may include a tunneling film, an electric charge storing layer, a blocking insulation film, and a gate electrode. The blocking insulation film may be an aluminum oxide having an energy band gap larger than that of a γ-phase aluminum oxide film. An α-phase crystalline aluminum oxide film as a blocking insulation film may have an energy band gap of about 7.0 eV or more along with fewer defects. The crystalline aluminum oxide film may be formed by providing a source film (e.g., AlF3 film) on or within a preliminary blocking insulation film (e.g., amorphous aluminum oxide film) and performing a heat treatment. Alternatively, an aluminum compound (e.g., AlF3) may be introduced into the preliminary blocking insulation film by other diffusion methods or ion implantation. Accordingly, the ability of the memory device to maintain electric charges may be improved, the operating voltage for programming and erasing may be lowered, and the operating speed may be increased.
    • 示例性实施例涉及使用电荷存储层作为存储节点的非易失性半导体存储器件及其制造方法。 电荷阱型非易失性存储器件可以包括隧穿膜,电荷存储层,阻挡绝缘膜和栅电极。 阻挡绝缘膜可以是具有比γ相氧化铝膜的能带隙大的能带隙的氧化铝。 作为阻挡绝缘膜的α相结晶氧化铝膜可以具有约7.0eV以上的能带隙和更少的缺陷。 结晶氧化铝膜可以通过在预先隔离绝缘膜(例如无定形氧化铝膜)上或内部提供源膜(例如,AlF 3膜)并进行热处理而形成。 或者,可以通过其它扩散方法或离子注入将铝化合物(例如,AlF 3)引入到初步阻挡绝缘膜中。 因此,可以提高存储器件保持电荷的能力,可以降低用于编程和擦除的操作电压,并且可以提高操作速度。