The improvement of atomic layer deposited SiO2/4H-SiC interfaces via a high temperature forming gas anneal
The improvement of atomic layer deposited SiO2/4H-SiC interfaces via a high temperature forming gas anneal
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通过高温合成气体退火改善原子层沉积的 SiO2/4H-SiC 界面
DOI:
10.1016/j.mssp.2020.105527
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发表时间:
2021
影响因子:
4.1
通讯作者:
Renz A
中科院分区:
文献类型:
--
作者:
Renz A
This letter reports on the improvement of a SiO 2 layer formed by atomic layer deposition on 4H-SiC, using a post-deposition anneal in forming gas ambient. Capacitance–voltage measurements revealed good electrical properties, compared to a thermal oxide which was grown in N 2 O, with flatband voltage values averaging at-0.29 V and a low positive mobile ion charge density in the order of 10 10 cm− 2. XPS analysis revealed the FG annealed sample to have the most Si rich interface comparatively to other PDAs, with a C: Si ratio of 0.72, allowing more Si bonds to be terminated. SIMS analysis identified an increase in hydrogen near the interface of the FG-annealed sample with a peak concentration of 2.12× 10 21 cm− 3. It is concluded that the improvement in electrical performance is due to the hydrogen passivating trap states at the SiO 2/4H-SiC interface.
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DOI:
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发表时间:
2010
期刊:
影响因子:
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DOI:
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DOI:
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发表时间:
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期刊:
--
影响因子:
--
作者:
A. B. Renz.
通讯作者:
A. B. Renz.