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    • 4. 发明申请
    • TRANSISTOR AND SEMICONDUCTOR DEVICE
    • 晶体管和半导体器件
    • WO2018002763A1
    • 2018-01-04
    • PCT/IB2017/053576
    • 2017-06-16
    • SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    • YAMAZAKI, Shunpei
    • H01L29/786H01L21/8242H01L27/108
    • H01L29/7869H01L29/24H01L29/42384H01L29/66969H01L29/78648H01L29/78696
    • A transistor includes a gate electrode, a first conductor, a second conductor, a gate insulator, and a metal oxide. The gate insulator is located between the gate electrode and the metal oxide. The gate electrode includes a region overlapping with the metal oxide with the gate insulator therebetween. The first conductor and the second conductor each include a region in contact with top and side surfaces of the metal oxide. The metal oxide has a layered structure in which oxides each having a first band gap and oxides each having a second band gap and being adjacent to the oxide having the first band gap are alternately stacked in a thickness direction. The metal oxide includes two or more oxides each having the first band gap. The first band gap is smaller than the second band gap.
    • 晶体管包括栅电极,第一导体,第二导​​体,栅极绝缘体和金属氧化物。 栅绝缘体位于栅电极和金属氧化物之间。 栅电极包括与其间的栅极绝缘体与金属氧化物重叠的区域。 第一导体和第二导体各自包括与金属氧化物的顶面和侧面接触的区域。 金属氧化物具有这样的层状结构,其中各自具有第一带隙的氧化物和各自具有第二带隙的氧化物和与具有第一带隙的氧化物相邻的氧化物在厚度方向上交替堆叠。 金属氧化物包括两种或更多种各自具有第一带隙的氧化物。 第一个带隙小于第二个带隙。