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    • 6. 发明授权
    • Display device
    • 显示设备
    • US07635895B2
    • 2009-12-22
    • US11647179
    • 2006-12-29
    • Hongyong ZhangYasuhiko TakemuraToshimitsu KonumaHideto OhnumaNaoaki YamaguchiHideomi SuzawaHideki Uochi
    • Hongyong ZhangYasuhiko TakemuraToshimitsu KonumaHideto OhnumaNaoaki YamaguchiHideomi SuzawaHideki Uochi
    • H01L27/12
    • H01L27/127H01L27/1214H01L29/66757H01L29/78621H01L29/78627
    • There is provided a method by which lightly doped drain (LDD) regions can be formed easily and at good yields in source/drain regions in thin film transistors possessing gate electrodes covered with an oxide covering. A lightly doped drain (LDD) region is formed by introducing an impurity into an island-shaped silicon film in a self-aligning manner, with a gate electrode serving as a mask. First, low-concentration impurity regions are formed in the island-shaped silicon film by using rotation-tilt ion implantation to effect ion doping from an oblique direction relative to the substrate. Low-concentration impurity regions are also formed below the gate electrode at this time. After that, an impurity at a high concentration is introduced normally to the substrate, so forming high-concentration impurity regions. In the above process, a low-concentration impurity region remains below the gate electrode and constitutes a lightly doped drain region.
    • 提供了一种方法,通过该方法可以容易地形成轻掺杂漏极(LDD)区域,并且在具有覆盖有氧化物覆盖层的栅电极的薄膜晶体管中的源/漏区域中以良好的产率形成。 通过以栅极电极作为掩模,以自对准的方式将杂质引入岛状硅膜中形成轻掺杂漏极(LDD)区域。 首先,通过使用旋转 - 倾斜离子注入在岛状硅膜中形成低浓度杂质区,以相对于衬底从倾斜方向进行离子掺杂。 此时也在栅电极下方形成低浓度杂质区。 之后,将高浓度的杂质通常引入衬底,从而形成高浓度杂质区域。 在上述过程中,低浓度杂质区域保留在栅电极下方并构成轻掺杂漏区。