Yayınlanmış 1 Ocak 2019
| Sürüm v1
Dergi makalesi
Açık
Investigation of angstrom-thick aluminium oxide passivation layers to improve the gate lag performance of GaN HEMTs
Oluşturanlar
- 1. Bilkent Univ, Nanotechnol Res Ctr, TR-06800 Ankara, Turkey
Açıklama
In this paper, we report an angstrom-thick atomic layer deposited (ALD) aluminum oxide (Al2O3) dielectric passivation layer for an AlGaN/GaN high electron mobility transistor (HEMT). Our results show a 55% improvement in the gate lag performance of the design and a decrease by half in interface state density upon coating with two cycles of ALD Al2O3. DC characteristics such as current density, threshold voltage, and leakage currents were maintained. ALD Al2O3 passivation layers with thicknesses up to 10 nm were investigated. XPS analyses reveal that the first ALD cycles are sufficient to passivate GaN surface traps. This study demonstrates that efficient passivation can be achieved in atomic-scale with dimensions much thinner than commonly used bulk layers.
Dosyalar
bib-c50bdd4b-7933-40ff-a7ce-38c80347d7f3.txt
Dosyalar
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