Method for Manufacturing Dummy Gate in Gate-Last Process and Dummy Gate in Gate-Last Process
    13.
    发明申请
    Method for Manufacturing Dummy Gate in Gate-Last Process and Dummy Gate in Gate-Last Process 有权
    闸门最后过程中虚拟门制造方法及闸门最后过程中虚拟门的制作方​​法

    公开(公告)号:US20140273426A1

    公开(公告)日:2014-09-18

    申请号:US14119869

    申请日:2012-12-12

    CPC classification number: H01L21/28123 H01L21/32139 H01L29/513 H01L29/66545

    Abstract: A method for manufacturing a dummy gate in a gate-last process and a dummy gate in a gate-last process are provided. The method includes: providing a semiconductor substrate; growing a gate oxide layer on the semiconductor substrate; depositing bottom-layer amorphous silicon on the gate oxide layer; depositing an ONO structured hard mask on the bottom-layer amorphous silicon; depositing top-layer amorphous silicon on the ONO structured hard mask; depositing a hard mask layer on the top-layer amorphous silicon, and trimming the hard mask layer so that the trimmed hard mask layer has a width less than or equal to 22 nm; and etching the top-layer amorphous silicon, the ONO structured hard mask and the bottom-layer amorphous silicon in accordance with the trimmed hard mask layer, and removing the hard mask layer and the top-layer amorphous silicon.

    Abstract translation: 提供了一种在门最后处理中制造伪栅极的方法和在栅极最后工艺中的伪栅极。 该方法包括:提供半导体衬底; 在半导体衬底上生长栅极氧化层; 在栅极氧化物层上沉积底层非晶硅; 在底层非晶硅上沉积ONO结构的硬掩模; 在ONO结构化的硬掩模上沉积顶层非晶硅; 在顶层非晶硅上沉积硬掩模层,并修剪硬掩模层,使得修整的硬掩模层具有小于或等于22nm的宽度; 并根据修整的硬掩模层蚀刻顶层非晶硅,ONO结构的硬掩模和底层非晶硅,以及去除硬掩模层和顶层非晶硅。

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