Thin film transistor and display device
    85.
    发明授权
    Thin film transistor and display device 有权
    薄膜晶体管和显示装置

    公开(公告)号:US09318507B2

    公开(公告)日:2016-04-19

    申请号:US14416213

    申请日:2013-08-30

    申请人: Kobe Steel, Ltd.

    摘要: Provided is a thin film transistor comprising an oxide semiconductor thin film layer and has a threshold voltage that does not change much due to light, a bias stress or the like, thereby exhibiting excellent stress stability. A thin film transistor of the present invention is provided with: a gate electrode; two or more oxide semiconductor layers that are used as a channel layer; an etch stopper layer for protecting the surfaces of the oxide semiconductor layers; a source-drain electrode; and a gate insulator film interposed between the gate electrode and the channel layer. The metal elements constituting an oxide semiconductor layer that is in direct contact with the gate insulator film are In, Zn and Sn. The hydrogen concentration in the gate insulator film, which is in direct contact with the oxide semiconductor layer, is controlled to 4 atomic % or less.

    摘要翻译: 提供了一种薄膜晶体管,其包括氧化物半导体薄膜层,并且具有由于光,偏压应力等而不会变化太大的阈值电压,从而表现出优异的应力稳定性。 本发明的薄膜晶体管设有:栅电极; 用作沟道层的两个或更多个氧化物半导体层; 用于保护氧化物半导体层的表面的蚀刻停止层; 源极 - 漏极电极; 以及插入在栅电极和沟道层之间的栅绝缘膜。 构成与栅极绝缘膜直接接触的氧化物半导体层的金属元素为In,Zn和Sn。 与氧化物半导体层直接接触的栅极绝缘膜的氢浓度被控制在4原子%以下。