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    • 9. 发明授权
    • Semiconductor memory device
    • 半导体存储器件
    • US08772849B2
    • 2014-07-08
    • US13410608
    • 2012-03-02
    • Kosei Noda
    • Kosei Noda
    • H01L29/76H01L29/12
    • H01L27/1156G11C16/0433H01L28/40
    • A semiconductor memory device includes a semiconductor film; a first gate insulating film covering the semiconductor film; a first gate electrode provided over the semiconductor film with the first gate insulating film interposed therebetween; a first conductive film which is provided over the first gate insulating film; an insulating film which is provided over the first gate insulating film, exposes top surfaces of the first gate electrode and the first conductive film, and has a groove portion between the first gate electrode and the first conductive film; an oxide semiconductor film which is provided over the insulating film and is in contact with the first gate electrode, the first conductive film, and the groove portion; a second gate insulating film covering the oxide semiconductor film; and a second gate electrode provided over the oxide semiconductor film and the groove portion with the second gate insulating film interposed therebetween.
    • 半导体存储器件包括半导体膜; 覆盖半导体膜的第一栅极绝缘膜; 设置在所述半导体膜上的第一栅电极,其间插入有所述第一栅极绝缘膜; 设置在所述第一栅极绝缘膜上的第一导电膜; 设置在第一栅极绝缘膜上的绝缘膜暴露第一栅电极和第一导电膜的顶表面,并且在第一栅电极和第一导电膜之间具有沟槽部分; 氧化物半导体膜,设置在所述绝缘膜上并且与所述第一栅电极,所述第一导电膜和所述槽部接触; 覆盖氧化物半导体膜的第二栅极绝缘膜; 以及设置在所述氧化物半导体膜和所述沟槽部分上方的第二栅电极,其间插入有所述第二栅极绝缘膜。