scholarly journals Implications of gate-edge electric field in AlGaN/GaN high electron mobility transistors during OFF-state degradation

2014 ◽  
Vol 54 (12) ◽  
pp. 2650-2655 ◽  
Author(s):  
H. Sun ◽  
M. Montes Bajo ◽  
M.J. Uren ◽  
M. Kuball
Keyword(s):  
Electric Field ◽  
Electron Mobility ◽  
High Electron Mobility Transistors ◽  
High Electron ◽  
High Electron Mobility ◽  
Electron Mobility Transistors ◽  
Gate Edge

scholarly journals Effect of Electric Field On Electron Mobility in Sub-100 nm InAlN/GaN High Electron Mobility Transistors

2021 ◽  
Author(s):  
Peng Cui ◽  
Yuping Zeng
Keyword(s):  
Electric Field ◽  
Electron Mobility ◽  
Scattering Theory ◽  
Field Effect Transistors ◽  
High Electron Mobility Transistors ◽  
Electron Velocity ◽  
High Electron ◽  
Current Output ◽  
High Electron Mobility ◽  
Electron Mobility Transistors

Abstract Electron mobility is important for electron velocity, transport current, output power, and frequency characteristics. In conventional mobility extraction methods, electron mobility is usually extracted directly from the measured gate capacitance (CG) and current-voltage characteristics. When device gate length (LG) scales to sub-100 nm, the determination of CG becomes more difficult not only for the measure equipment but also the enhanced effect from parasitic capacitance. Here in this paper, the CG extracted from high-frequency small-signal equipment circuit is used for the InAlN/GaN high electron mobility transistors (HEMTs). Electron mobility of the device with LG of 60-nm under VDS of 0.1 V and 10 V is extracted using two-dimensional scattering theory, respectively. The obtained results show that under a high electric field, the electron temperature (Te) and addition polarization charges (∆σ) increase, resulting in the enhanced polar optical phonon (POP) as well as polarization Coulomb field (PCF) scatterings and degradation of the electron mobility. This study makes it possible to improve the electron mobility by reducing Te and ∆σ for the InAlN/GaN HEMTs application.AlGaN/GaN heterostructure field-effect transistors with different gate lengths were fabricated. Based on the chosen of the Hamiltonian of the system and the additional polarization charges, two methods to calculate PCF scattering by the scattering theory were presented. By comparing the measured and calculated source-drain resistances, the influence of the different gate lengths on the PCF scattering potential was confirmed.

scholarly journals Electric Field Reduction in C-Doped AlGaN/GaN on Si High Electron Mobility Transistors

2015 ◽  
Vol 36 (8) ◽  
pp. 826-828 ◽  
Author(s):  
Michael J. Uren ◽  
Markus Caesar ◽  
Serge Karboyan ◽  
Peter Moens ◽  
Piet Vanmeerbeek ◽  
...  
Keyword(s):  
Electric Field ◽  
Electron Mobility ◽  
High Electron Mobility Transistors ◽  
High Electron ◽  
High Electron Mobility ◽  
Electron Mobility Transistors ◽  
Gan On Si
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