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Electrical Properties of Ultra Thin Nitride/Oxynitride Stack Dielectrics pMOS Capacitor with Refractory Metal Gate

Keywords: equivalent oxide thickness,nitride/oxynitride gate dielectric stack,high k,boron-penetration,metal gate
equivalent
,oxide,thickness,nitride/oxynitride,gate,dielectric,stack,high,k,boron,penetration,metal,gate

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Abstract:

Electrical properties of high quality ultra thin nitride/oxynitride(N/O)stack dielectrics pMOS capacitor with refractory metal gate electrode are investigated,and ultra thin (<2 nm) N/O stack gate dielectrics with significant low leakage current and high resistance to boron penetration are fabricated.Experiment results show that the stack gate dielectric of nitride/oxynitride combined with improved sputtered tungsten/titanium nitride (W/TiN) gate electrode is one of the candidates for deep sub-micron metal gate CMOS devices.

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