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Method for Manufacturing Dummy Gate in Gate-Last Process and Dummy Gate in Gate-Last Process
Method for Manufacturing Dummy Gate in Gate-Last Process and Dummy Gate in Gate-Last Process
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机译:最后浇口的虚拟闸门的制造方法及最后浇口的虚拟闸门的制造方法
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摘要
A method for manufacturing a dummy gate in a gate-last process is 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; forming photoresist lines having a width ranging from 32 nm to 45 nm on the hard mask layer; and etching the hard mask layer, the top-layer amorphous silicon, the ONO structured hard mask and the bottom-layer amorphous silicon in accordance with the photoresist lines, and removing the photoresist lines, the hard mask layer and the top-layer α-Si. Correspondingly, a dummy gate in a gate-last process is also provided.
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