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    • 6. 发明申请
    • SEMICONDUCTOR SWITCHING ELEMENT
    • 半导体开关元件
    • WO2017145211A1
    • 2017-08-31
    • PCT/JP2016/005222
    • 2016-12-26
    • TOYOTA JIDOSHA KABUSHIKI KAISHADENSO CORPORATION
    • SAITO, JunAOI, SachikoURAKAMI, Yasushi
    • H01L29/78H01L29/739H01L29/06
    • H01L29/7813H01L21/047H01L21/26586H01L29/0623H01L29/0696H01L29/1095H01L29/1608H01L29/42368H01L29/66068H01L29/66734H01L29/7397
    • A trench gate semiconductor switching element is provided. The semiconductor substrate of ths element includes a second conductivity type bottom region in contact with the gate insulation layer at a bottom surface of the trench, and a first conductivity type second semiconductor region extending from a position in contact with a lower surface of the body region to a position in contact with a lower surface of the bottom region. The bottom region includes a first bottom region in contact with the gate insulation layer in a first range of the bottom surface positioned at an end in a long direction of the trench and extending from the bottom surface to a first position; and a second bottom region in contact with the gate insulation layer in a second range adjacent to the first range and extending from the bottom surface to a second position lower than the first position.
    • 提供沟槽栅极半导体开关元件。 该元件的半导体衬底包括在沟槽的底表面处与栅极绝缘层接触的第二导电类型底部区域和从与主体区域的下表面接触的位置延伸的第一导电类型第二半导体区域 到与底部区域的下表面接触的位置。 所述底部区域包括第一底部区域和第二底部区域,所述第一底部区域在所述底表面的第一范围中与所述栅极绝缘层接触,所述第一底部表面位于所述沟槽的长度方向上的端部处并且从所述底表面延伸到第一位置; 以及第二底部区域,所述第二底部区域在与所述第一范围相邻的第二范围内与所述栅极绝缘层接触,并且从所述底面延伸到低于所述第一位置的第二位置。