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    • 7. 发明授权
    • Control trimming of hard mask for sub-100 nanometer transistor gate
    • 对100纳米晶体管栅极的硬掩模进行控制修整
    • US06482726B1
    • 2002-11-19
    • US09690152
    • 2000-10-17
    • Massud AminpurDavid WuScott Luning
    • Massud AminpurDavid WuScott Luning
    • H01L213205
    • H01L21/28123H01L29/6659
    • A method is provided, the method including forming a gate dielectric layer above a substrate layer, forming a gate conductor layer above the gate dielectric layer, forming a first hard mask layer above the gate conductor layer, and forming a second hard mask layer above the first hard mask layer. The method also includes forming a trimmed photoresist mask above the second hard mask layer, and forming a patterned hard mask in the second hard mask layer using the trimmed photoresist mask to remove portions of the second hard mask layer, the patterned hard mask having a first dimension. The method further includes forming a selectively etched hard mask in the first hard mask layer by removing portions of the first hard mask layer adjacent the patterned hard mask, the selectively etched hard mask having a second dimension less than the first dimension, and forming a gate structure using the selectively etched hard mask to remove portions of the gate conductor layer above the gate dielectric layer.
    • 提供了一种方法,该方法包括在衬底层上方形成栅介质层,在栅极介电层上方形成栅极导体层,在栅极导体层之上形成第一硬掩模层,并形成第二硬掩模层 第一硬掩模层。 该方法还包括在第二硬掩模层之上形成修整的光致抗蚀剂掩模,并且在第二硬掩模层中使用经修剪的光致抗蚀剂掩模形成图案化的硬掩模以去除第二硬掩模层的部分,图案化硬掩模具有第一 尺寸。 该方法还包括通过去除与图案化的硬掩模相邻的第一硬掩模层的部分来形成第一硬掩模层中的选择性蚀刻的硬掩模,该选择性蚀刻的硬掩模具有小于第一尺寸的第二尺寸,以及形成栅极 结构,其使用选择性蚀刻的硬掩模以去除栅极介电层上方的栅极导体层的部分。