Improved SiO2/ 4H-SiC Interface Defect Density Using Forming Gas Annealing
Improved SiO2/ 4H-SiC Interface Defect Density Using Forming Gas Annealing
复制标题
使用合成气体退火提高 SiO2/4H-SiC 界面缺陷密度
DOI:
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发表时间:
2019
期刊:
影响因子:
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通讯作者:
L. Knoll
中科院分区:
文献类型:
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作者:
S. Wirths;G. Alfieri;A. Prasmusinto;A. Mihaila;L. Kranz;M. Bellini;L. Knoll
We investigated the influence of forming gas annealing (FGA) before and after oxide deposition on the SiO2/4H-SiC interface defect density (Dit). For MOS capacitors (MOSCAPs) that were processed using FGAs at temperatures above 1050°C, CV characterization revealed decreased flat band voltage shifts and stretch-out for different sweep directions and frequencies. Moreover, constant-capacitance deep level transient spectroscopy (CC-DLTS) was performed and showed Dit levels below 1012 cm-2eV-1 for post deposition FGA at 1200°C. Finally, lateral MOSFETs were fabricated to analyze the temperature-dependent threshold voltage (Vth) shift.