Thin film transistor and matrix display device
    3.
    发明授权
    Thin film transistor and matrix display device 有权
    薄膜晶体管和矩阵显示装置

    公开(公告)号:US06563174B2

    公开(公告)日:2003-05-13

    申请号:US10224879

    申请日:2002-08-21

    IPC分类号: H01L2701

    摘要: In a thin film transistor, a gate insulating film having a first insulating film and a second insulating film is formed on a gate electrode, and a semiconductor layer including ZnO etc. is formed on the second insulating film. The first insulating film is formed by using SiNx having a high insulating characteristic, and the second insulating film is formed by using an oxide (for example, SiO2). This structure improves a crystalline characteristic of the semiconductor layer that constitutes an interface in combination with the second insulating film, and decreases a defective level of the interface between the semiconductor layer and the second insulating film. Further, the second insulating film is constituted of the oxide, so that it is possible to restrain a material for the second insulating film from depriving oxygen of the semiconductor layer. This keeps a crystalline characteristic of the semiconductor layer under a preferable condition in the vicinity of the interface between the second insulating film and the semiconductor layer. As a result, it is possible to realize a thin film transistor such that: a leak current level at an OFF area is low, and the mobility is high, and a switching characteristic is preferable. Thus, in the thin film transistor having a transparent semiconductor film, a TFT characteristic is improved.

    摘要翻译: 在薄膜晶体管中,在栅电极上形成具有第一绝缘膜和第二绝缘膜的栅极绝缘膜,并且在第二绝缘膜上形成包括ZnO等的半导体层。 第一绝缘膜通过使用具有高绝缘特性的SiNx形成,并且第二绝缘膜通过使用氧化物(例如,SiO 2)形成。 该结构改善了构成与第二绝缘膜结合的界面的半导体层的结晶特性,并降低了半导体层与第二绝缘膜之间的界面的缺陷水平。 此外,第二绝缘膜由氧化物构成,使得可以抑制第二绝缘膜的材料剥夺半导体层的氧。 这在第二绝缘膜和半导体层之间的界面附近的优选条件下保持半导体层的结晶特性。 结果,可以实现薄膜晶体管,使得在OFF区域的漏电流水平低,并且迁移率高,并且切换特性是优选的。 因此,在具有透明半导体膜的薄膜晶体管中,提高了TFT特性。

    Liquid crystal display element
    7.
    发明授权
    Liquid crystal display element 失效
    液晶显示元件

    公开(公告)号:US4997262A

    公开(公告)日:1991-03-05

    申请号:US515362

    申请日:1990-04-30

    摘要: A liquid crystal display element for matrix display, employing, as address elements, thin film transistors each having a layered arrangement of a gate electrode, an insulating film, a semiconductor film, a source electrode, a drain electrode and a display picture element electrode formed in that order on an insulating substrate. The liquid crystal display element is characterized by a thin metallic film for smoothing path lines for the source electrodes, formed of the same material as that forming the gate electrodes in a plane including the gate electrodes.

    Method of fabricating a liquid crystal display device
    9.
    发明授权
    Method of fabricating a liquid crystal display device 失效
    制造液晶显示装置的方法

    公开(公告)号:US5231039A

    公开(公告)日:1993-07-27

    申请号:US743029

    申请日:1991-08-09

    IPC分类号: G02F1/1362

    CPC分类号: G02F1/136213

    摘要: A liquid crystal display device is described which contains picture element electrodes arranged on an insulating substrate and thin film transistors for switching the voltage to be applied to the picture element electrodes. The device is characterized in that additional capacity electrodes are formed from the same material as electrodes of the thin film transistors, between the insulating substrate and the picture element electrodes.

    摘要翻译: 描述了一种液晶显示装置,其包含布置在绝缘基板上的像素电极和用于切换施加到像素电极的电压的薄膜晶体管。 该器件的特征在于,在绝缘衬底和像素电极之间,由与薄膜晶体管的电极相同的材料形成附加电容电极。