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- W2891885610 abstract "The key technologies for the dual high-k and dual metal gate, such as the electrical optimization of metal insert poly-Si stack structure, the separating of high-k and metal gate of n/pMOS in different regions of the wafer, and the synchronous etching of n/pMOS gate stack, are successfully developed. First, reasonable flat-band voltage and equivalent oxide thickness of pMOS MIPS structure are obtained by further optimizing the HfSiAlON dielectric through incorporating more Al–O dipole at interface between HfSiAlON and bottom SiO x . Then, the separating of high-k and metal gate for n/pMOS is achieved by SC1 (NH4OH:H2 O 2:H2O = 1 :1 : 5) and DHF-based solution for the selective removing of nMOS TaN and HfSiON and by BCl3-based plasma and DHF-based solution for the selective removing of pMOS TaN/Mo and HfSiAlON. After that, the synchronous etching of n/pMOS gate stack is developed by utilizing optimized BCl3/SF6/O2/Ar plasma to obtain a vertical profile for TaN and TaN/Mo and by utilizing BCl3/Ar plasma combined with DHF-based solution to achieve high selectivity to Si substrate. Finally, good electrical characteristics of CMOS devices, obtained by utilizing these new developed technologies, further confirm that they are practicable technologies for DHDMG integration." @default.
- W2891885610 created "2018-09-27" @default.
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- W2891885610 date "2018-09-01" @default.
- W2891885610 modified "2023-10-17" @default.
- W2891885610 title "Key technologies for dual high- k and dual metal gate integration" @default.
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- W2891885610 doi "https://doi.org/10.1088/1674-1056/27/9/097306" @default.
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