Semiconductor device having a nonvolatile memory cell with field effect transistors
    1.
    发明授权
    Semiconductor device having a nonvolatile memory cell with field effect transistors 有权
    具有具有场效应晶体管的非易失性存储单元的半导体器件

    公开(公告)号:US08461642B2

    公开(公告)日:2013-06-11

    申请号:US12534140

    申请日:2009-08-02

    IPC分类号: H01L29/792 H01L21/336

    摘要: The present invention can realize a highly-integrated semiconductor device having a MONOS type nonvolatile memory cell equipped with a split gate structure without deteriorating the reliability of the device. A memory gate electrode of a memory nMIS has a height greater by from 20 to 100 nm than that of a select gate electrode of a select nMIS so that the width of a sidewall formed over one (side surface on the side of a source region) of the side surfaces of the memory gate electrode is adjusted to a width necessary for achieving desired disturb characteristics. In addition, a gate electrode of a peripheral second nMIS has a height not greater than the height of a select gate electrode of a select nMIS to reduce the width of a sidewall formed over the side surface of the gate electrode of the peripheral second nMIS so that a shared contact hole is prevented from being filled with the sidewall.

    摘要翻译: 本发明可以实现具有配备有分离栅极结构的MONOS型非易失性存储单元的高度集成的半导体器件,而不会降低器件的可靠性。 存储器nMIS的存储栅电极具有比选择nMIS的选择栅电极高20至100nm的高度,使得形成在一个侧面(源区侧面上的侧表面)的侧壁的宽度 将存储栅电极的侧表面调节到实现所需干扰特性所需的宽度。 此外,外围第二nMIS的栅电极具有不大于选择nMIS的选择栅电极的高度的高度,以减小形成在周边第二nMIS的栅电极的侧表面上的侧壁的宽度,所以 防止共享的接触孔被侧壁填充。