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    • 75. 发明申请
    • SEMICONDUCTOR DEVICE
    • 半导体器件
    • US20130168671A1
    • 2013-07-04
    • US13807901
    • 2011-06-30
    • Junichi KoikePilsang YunHideaki Kawakami
    • Junichi KoikePilsang YunHideaki Kawakami
    • H01L29/417
    • H01L29/417H01L29/45H01L29/78618H01L29/7869H01L33/26H01L33/40
    • An ohmic contact between an electrode and a semiconductor layer is more stably formed and an electrical contact resistance between them is further reduced.A semiconductor device comprises a semiconductor layer 103 composed of an oxide semiconductor material containing indium, an ohmic electrode 107 provided on the semiconductor layer 103 and having an ohmic contact with the semiconductor layer 103, and an intermediate layer 106 provided between the semiconductor layer 103 and the ohmic electrode 107, wherein the intermediate layer 106 includes a first region 106a whose indium atomic concentration is greater than that of an interior of the semiconductor layer 103 and a second region 106b whose indium atomic concentration is less than that of the first region.
    • 电极和半导体层之间的欧姆接触更稳定地形成,并且它们之间的电接触电阻进一步降低。 半导体器件包括由包含铟的氧化物半导体材料构成的半导体层103,设置在半导体层103上并与半导体层103具有欧姆接触的欧姆电极107以及设置在半导体层103和 欧姆电极107,其中中间层106包括其铟原子浓度大于半导体层103的内部的第一区域106a和铟原子浓度小于第一区域的第二区域106b。