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    • 6. 发明授权
    • Semiconductor device and display device
    • 半导体器件和显示器件
    • US09000441B2
    • 2015-04-07
    • US12504897
    • 2009-07-17
    • Daisuke KawaeYoshiyuki KurokawaHidekazu Miyairi
    • Daisuke KawaeYoshiyuki KurokawaHidekazu Miyairi
    • H01L27/14H01L29/786H01L27/12H01L29/04H01L29/66
    • H01L29/78696H01L27/1214H01L27/1288H01L29/04H01L29/66765H01L29/78645
    • A thin film transistor whose threshold voltage can be controlled and which has a favorable switching characteristic is provided. The thin film transistor includes a first gate electrode layer; a semiconductor layer; a first gate insulating layer provided between the first gate electrode layer and the semiconductor layer; source electrode and drain electrode layers which are provided over the semiconductor layer; a conductive layer covered by the first gate insulating layer and the semiconductor layer and provided so as to overlap with part of the first gate electrode layer; a second gate insulating layer provided so as to cover at least a back channel portion of the semiconductor layer; and a second gate electrode layer provided over the second gate insulating layer so as to overlap with the back channel portion of the semiconductor layer.
    • 提供了可以控制阈值电压并具有良好的开关特性的薄膜晶体管。 薄膜晶体管包括第一栅电极层; 半导体层; 设置在所述第一栅极电极层和所述半导体层之间的第一栅极绝缘层; 源电极和漏极电极层,设置在半导体层上; 由第一栅极绝缘层和半导体层覆盖的导电层,并且设置成与第一栅极电极层的一部分重叠; 第二栅极绝缘层,设置成覆盖半导体层的至少后沟道部分; 以及第二栅极电极层,设置在所述第二栅极绝缘层上方以与所述半导体层的所述后部沟道部重叠。
    • 8. 发明授权
    • Method for manufacturing thin film transistor and method for manufacturing display device
    • 薄膜晶体管的制造方法及显示装置的制造方法
    • US08709836B2
    • 2014-04-29
    • US13175990
    • 2011-07-05
    • Hidekazu MiyairiTakafumi Mizoguchi
    • Hidekazu MiyairiTakafumi Mizoguchi
    • H01L21/00
    • H01L27/1288H01L27/1214
    • An object is to provide a method for manufacturing a thin film transistor and a display device with reduced number of masks, in which adverse effects of optical current are suppressed. A manufacturing method comprises forming a stack including, from bottom to top, a light-blocking film, a base film, a first conductive film, a first insulating film, a semiconductor film, an impurity semiconductor film, and a second conductive film; performing first etching on the whole thickness of the stack using a first resist mask formed over it; forming a gate electrode layer by side etching the first conductive film in a second etching; forming a second resist mask over the stack; and performing third etching down to the semiconductor film, and partially etching it, using the second resist mask to form a source and drain electrode layer, a source and drain region, and a semiconductor layer.
    • 本发明的目的是提供一种制造薄膜晶体管的方法和减少数量的掩模的显示装置,其中抑制了光电流的不利影响。 一种制造方法,包括从底部到顶部形成包括遮光膜,基底膜,第一导电膜,第一绝缘膜,半导体膜,杂质半导体膜和第二导电膜的堆叠体; 使用形成在其上的第一抗蚀剂掩模对堆叠的整个厚度执行第一蚀刻; 在第二蚀刻中通过侧蚀刻所述第一导电膜形成栅极电极; 在堆叠上形成第二抗蚀剂掩模; 并且使用第二抗蚀剂掩模对半导体膜执行第三蚀刻并部分蚀刻,以形成源极和漏极电极层,源极和漏极区域以及半导体层。