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    • 6. 发明公开
    • THIN-FILM TRANSISTOR AND PREPARATION METHOD THEREFOR, ARRAY SUBSTRATE, AND DISPLAY PANEL
    • 德黑兰,德黑兰,德黑兰,阿拉伯联合酋长国
    • EP3121840A1
    • 2017-01-25
    • EP15882903.6
    • 2015-10-09
    • BOE Technology Group Co., Ltd.South China University of Technology
    • YUAN, GuangcaiYAN, LiangchenXU, XiaoguangWANG, LeiPENG, JunbiaoLAN, Linfeng
    • H01L21/34H01L29/786
    • This invention discloses a thin film transistor and the preparation method thereof, an array substrate, and a display panel, so as to solve the problem that the active layer is prone to be corroded when a metal oxide thin film transistor is produced by a back channel etching process. The preparation method comprises: forming a gate electrode metal thin film on a base substrate, and allowing the gate electrode metal thin film to form a gate electrode metal layer comprising a gate electrode by a patterning process; forming a gate electrode insulating layer on the gate electrode metal layer; forming an active layer on the gate electrode insulating layer; preparing a metal nanoparticle layer on the active layer, said metal nanoparticle layer being used as an etching protection layer; forming a source and drain electrode metal thin film on the base substrate on which the above processes are finished, and allowing the source and drain electrode metal thin film to form a source and drain electrode metal layer comprising a source electrode and a drain electrode by a patterning process, wherein the source electrode and the drain electrode cover a part of the metal nanoparticle layer; removing or oxidizing the part of the metal nanoparticle layer which is not covered by the source electrode and the drain electrode in an oxygen-containing atmosphere; and forming a passivation layer on the source and drain electrode metal layer.
    • 本发明公开了一种薄膜晶体管及其制备方法,阵列基板和显示面板,以解决当通过背沟道产生金属氧化物薄膜晶体管时有源层易于被腐蚀的问题 蚀刻工艺。 该制备方法包括:在基底基板上形成栅电极金属薄膜,并通过图案化工艺使栅电极金属薄膜形成包括栅电极的栅电极金属层; 在栅电极金属层上形成栅电极绝缘层; 在栅电极绝缘层上形成有源层; 在活性层上制备金属纳米颗粒层,所述金属纳米颗粒层用作蚀刻保护层; 在其上完成上述工艺的基底基板上形成源极和漏极金属薄膜,并且允许源极和漏极金属薄膜通过一个源极和漏极电极金属薄膜形成源极和漏极电极, 其中所述源电极和所述漏电极覆盖所述金属纳米颗粒层的一部分; 在含氧气氛中去除或氧化未被源电极和漏电极覆盖的金属纳米颗粒层的部分; 以及在所述源极和漏极电极金属层上形成钝化层。