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    • 3. 发明授权
    • Semiconductor device and production method therefor
    • 半导体装置及其制造方法
    • US5847432A
    • 1998-12-08
    • US457724
    • 1995-06-01
    • Masahiko Nozaki
    • Masahiko Nozaki
    • H01L27/04H01L21/822H01L21/8238H01L27/092H01L29/76H01L21/265
    • H01L21/823807H01L27/0922Y10S438/981
    • A semiconductor device to which two kinds of electric voltage can be supplied comprises: a first MOS transistor formed in the first well having a first conduction type and being fixed to a first electric potential, a second MOS transistor formed in a second well having a second conduction type different from the first one and being fixed to a second electric potential higher than the first electric potential, and a third well formed between the first and second wells having the second conduction type and being fixed to a ground electric potential. The first MOS transistor comprises a first gate oxide film having a prescribed thickness and a first gate electrode having a prescribed gate length, while the second MOS transistor comprises a second gate oxide film having a thickness larger than the prescribed thickness of the first gate oxide film and a second gate electrode having a gate length longer than the prescribed thickness of the first gate length.
    • 可以提供两种电压的半导体器件包括:形成在具有第一导电类型并固定到第一电位的第一阱中的第一MOS晶体管,形成在具有第二阱的第二阱中的第二MOS晶体管 导电类型不同于第一电极并被固定到高于第一电位的第二电位,以及形成在具有第二导电类型并被固定为接地电位的第一阱和第二阱之间的第三阱。 第一MOS晶体管包括具有规定厚度的第一栅极氧化膜和具有规定栅极长度的第一栅极电极,而第二MOS晶体管包括厚度大于第一栅极氧化膜的规定厚度的第二栅极氧化膜 以及具有比第一栅极长度的规定厚度长的栅极长度的第二栅极电极。