GaAs p- and n-MOS devices integrated with novel passivation (plasma nitridation and AlN-surface passivation) techniques and ALD-HfO2/TaN gate stack
2006
By using novel surface passivation techniques (plasma nitridation, AlN-passivation) on GaAs, we demonstrate GaAs p- and n-MOS devices integrated with ALD-HfO 2 /TaN gate stack. Results show that robust passivation layers can be achieved at HfO 2 /GaAs interface, leading to good C-V characteristics on both n- and p-type GaAs with low leakage current. It is also found that GaAs MOS devices with plasma nitridation and AlN-passivation show higher thermal-stability than Si-passivated devices
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