DTRA Contract Ga2O3 Radiation Effects
Ga2O3 Radiation Effects:
Objective: To understand the low and high dose stability of β-phase of Gallium Oxide to neutrons, electrons and protons, in order to simulate common radiation environments. Measure fundamental parameters such as carrier removal rate, energy level and thermal stability of traps and role of hydrogen.
Method: Unique coupling of theory and experiment to produce a detailed understanding of the effects of radiation on this promising wide bandgap semiconductor and a predictive capability for new radiation hardened materials and components.
DTRA Contract - AlGaN Radiation Effects
Summary of Key FLOODS Simulation Results for Proton Radiation Effects:
- Insights Into Underlying Physical Mechanics
- Mobility degradation can be explained by ionized impurity scattering from radiation-generated point source defects
- Ionized acceptor traps are responsible for positive Vt shift and reduction in Ids and gm; however, compensation by ionized donor traps mitigate severity of degradation
- Degradation of small signal AC and RF performance can be modeled primarily with static defect trap states
- New TCAD Modeling Capability in FLOODS as a Result of Simulation Needs
- Calculation of partial ionization of static traps using technique to improve convergence (trap energy spread)
- Small signal analysis capability using sinusoidal steady-state analysis technique
- Incorporation of multiple trap states in small signal or transient simulation
This paper is one of the most downloaded over the last year. S.J. Pearton, F. Ren, Erin Patrick, M.E. Law, and Alexander Polakov, “Review – Ionizing Radiation Damage Effects on GaN Devices”, ECS Journal of Solid State Science and Technology, 5(2) Q35-60, 2016.
AFOSR MURI - AlGaN Reliability
This effort ran from 2008-2013. Work on reliability for AlGaN is highlighted here - Reliability MURI
Chemical Sensor Simulation
We are aiming to understand the operation of chemical sensors with an initial focus on pH sensors. In particular, we are looking to understand and model two dimensional effects and drain bias on the sensitivity of the sensor.
FLOOXS was developed largely with support from the Semiconductor Research Corporation (SRC). The development effort won the 1993 SRC Technical Excellence Award.
This is the main page for the FLOOXS (FLOOPS, FLOODS, FLOORS) wiki manual. FLOOXS stands for the FLorida Object Oriented Device, Process and Reliability Simulator, using the old unix wild card convention of x taking the place of either "P", "R", or "D". The codes are built as a single executable (FLOOXS) and are configured with different sets of default variables for each purpose (FLOOPS/FLOODS/FLOORS).
Porting Notes from a 2016 port of the 2008 version. Thanks to Rex Lowther for sharing!