A List of Master and Graduation Theses

2023

Master thesis

・Study of the effects of device simulation parameters and sine wave signals on Y-parameters and DC characteristics of GaN HEMTs

・Study on Surface Traps in GaN HEMTs under Electric Stress and Forward Bias using Low-Frequency Y -parameters Measurement

・Study on evaluation of transient response characteristics of traps in GaN HEMTs and comparison with Y21 and Y22 characteristics

Graduation thesis

・Bias dependence of Y parameter in GaN HEMT using device simulation

・Acceptor type trap or donor type How traps affect the Y-parameter of GaN HEMTs Research using related device simulations

・Surface Trap Location in AlGaN/GaN HEMTs. Influence of surface trap location on low-frequency Y parameters (device simulation)

・Study of the effect of field structure and Fe impurity on low-frequency Y_21 and Y_22 of GaN HEMT

・Study on trap response in the extremely low frequency region of GaN HEMT by transient response measurement

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2022

Master thesis

・Transient response and low-frequency Y-parameters for GaN HEMTs (A study on the bias dependence of the trap signal)

・Characterization of surface traps in GaN HEMTs using low-frequency Y-parameter measurements

・Effect of Acceptor Trap Depth in GaN HEMTs on Low Frequency Y-parameters (Device Simulation Study)

Graduation thesis

・Study on　Process Technology toward Fabrication of Rectenna Circuits using GaN Devices

・A device simulation study on the effect of thermal parameters on the electrical properties of GaN HEMTs

・Study on the Influence of Surface Acceptor Type Discrete Trap Levels on Low Frequency Y Parameters in GaN HEMTs Using Device Simulation

・Study of the effect of field plate structure and Fe impurity on low-frequency Y_21 and Y_22 of GaN HEMT

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2021

Master thesis

・Studies on fabrication and electrical properties of Diamond Schottky Barrier Diodes using ion implantation process

・Evaluation of traps in GaN transistors using temperature and voltage dependence of frequency Y parameters

Graduation thesis

・Study of Access region structure of GaN HEMTs for Power Devices using Device Simulation

・Study of the cascode configuration consisted of GaN HEMT and Si SBD by circuit simulation

・Study on Effects of Electron Mobility parameters on Low-frequency Y22 characteristics of GaN HEMTs using Device Simulation

・Study on Buffer Trap Characterization in Fe-doped GaN HEMT using Two-port Network Measurement

・Study on Trap Time Constant of GaN HEMTs using Transient Response Measurement

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2020

Master thesis

・Study of deep level by small signal equivalent circuit analysis of GaN HEMT

・Study of side gate effect of AlGaN/GaN HEMT with multi-layer GaN structure by device simulation

Graduation thesis

・Study on trap evaluation of GaN HEMTs by measurement of low frequency Y parameters

・Study on deep levels in GaN devices using broadband measurement of Z parameters

・Study on GaN Schottky barrier diode for high power high frequency rectenna using LTspice

・Study for the fabrication of diamond Schottky barrier diodes using double-layer resists

・Study on buffer trap and self-heating of AlGaN/GaN HEMT using low frequency Y parameter with device simulation

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2019

Master thesis

・Study on RF-DC conversion circuit using cascode configurations of GaN HEMT and Si diode

・Study fabrication of fine gate and parasitic capacitance reduction structure in diamond MOSFET

・Device Manufacture for the Circuit Implementation of Diamond SBD for Large Electricity High-frequency Rectenna

・Using β-Ga2O3 semiconductor Flame detection sensor and its application research to rectenna circuitr

Graduation thesis

・Research on diamond Schottky barrier diode using ion implantation technology

・Study on buffer trap of GaN HEMT with low frequency Y parameter using device simulation

・Study on high frequency characteristics of RF-DC conversion circuit using wide band gap semiconductor

・Study on construction of low frequency Y parameter measurement system and initial evaluation of GaN HEMT

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2018

Master thesis

・Study on fabrication of RF-DC conversion circuit using Ga2O3 Schottky Barrier Diode for high power rectenna and research on high frequency operation

・Evaluation of DC characteristics and Small-signal RF characteristics for MOSFETs fabricated on hetero-epitaxial diamond substrate

・Fabrication of diamond chottky barrier diodes using Al2O3 interlayer and its RF-DC conversion operationr

Graduation thesis

・Study on forming process of two-layer metal T-shaped gate electrode by wet etching for high breakdown voltage of diamond FET

・Study on fabrication process for incorporating diamond MOSFET into high frequency circuit using wire bonding

・Research on conduction mechanism of β -Ga2O3 Schottky barrier diode using Thin Surface Barrier model

・Study on dual diode type RF-DC conversion circuit using diamond by simulation

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2017

Master thesis

・Study on resistance and capacitance product in wide band gap semiconductor Schottky barrier diode for high power high frequency rectenna and study on high voltage

・Study on constant voltage stress in air for NO2 adsorbed H-terminated diamond FET and high temperture Al2O3 applied etching process

Graduation thesis

・Fabrication of coplanar waveguide with GaN HEMT and research on high frequency pulse response measurement

・Gallium oxide SBD for large power rectenna study on the influence of carrier concentration on RF-DC conversion operation

・Fabrication of high frequency circuit using cascode connection of wide bandgap semiconductor transistor and Si diode and research on RF/DC conversion efficiency operation

・For fine gate diamond MOSFET Study on preparation of photomask and gate resist pattern formation

・Wire Bonding for Circuit Implementation of Diamond SBD　for High-power and High-frequency Rectenna

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2016

Master thesis

・Study on buffer trap evaluation of GaN HEMT using low frequency S parameter measurement　

・Small Signal Modeling of GaN SBDs and Fablicating Rectenna Circuit with Cascode Connection　

Graduation thesis

・Fabrication and Characterization of GaN HEMTs RF-DC Conversion Circuit for High Power and High Frequency Rectenna　

・Fabrication of Diamond MOSFETs Using Image Reverse Method and Measurement of Field Effect Mobility　

・Study on application of fixed charge model to device simulation of NO2 hole doping diamond MOSFETs　

・Process refinement of diamond Schottky barrier diodes for high-power high frequency rectenna and estimation of RF-DC conversion efficiency　

・Construction of the measurement system for evaluation of high frequency pulse characteristics on GaN HEMTs　

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2015

Graduation thesis

・Study on parameter dependence of GaN high electron mobility transistors by device simulation　

・Fabrication of diamond Schottky barrier diodes and application to rectenna circuit　

・Fabrication and electrical properties of Al2O3 by atomic layer deposition method 　

・Fabrication of the frequency properties measurement system of the impedance and accommodation to GaN Schottky barrier diodes　

・Study on trap in GaN high electron mobility transistors by transient current measurement -passivation film dependence-　

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2014

Graduation thesis

・Gate length dependence of GaN High Electron Mobility Transistors 　　

・Device simulation on GaN high electron mobility transistors and Diamond field effect transistors　

・Analysis of GaN Schottky Barrier Diodes using three-terminal structure 　

・Electrode edge effect of the GaN schottky barrier diodes with two dimensional structure