Field Plate Designs in All-GaN Cascode Heterojunction Field-Effect Transistors

Buffer Transport Mechanisms in Intentionally Carbon Doped GaN Heterojunction Field Effect Transistors

Temperature dependent pulsed and ramped substrate bias measurements are used to develop a detailed understanding of the vertical carrier transport in the buffer layers in a carbon doped GaN power heterojunction field effect transistor. Carbon doped GaN and multiple layers of AlGaN alloy are used in these devices to deliver an insulating and strain relieved buffer with high breakdown voltage cap...

Transient characteristics of Al x Ga 1x N/GaN heterojunction field-effect transistors

Investigation of InAs/InGaAs/InP Heterojunction Tunneling Field-Effect Transistors

Tunneling field-effect transistors (TFETs) are very applicable to low standby-power application by their virtues of low off-current (Ioff) and small subthreshold swing (S). However, low on-current (Ion) of silicon-based TFETs has been pointed out as a drawback. To improve Ion of TFET, a gate-all-around (GAA) TFET based on III-V compound semiconductor with InAs/InGaAs/InP multiple-heterojunction...

Charge trapping on defects in AlGaN/GaN field effect transistors

The presence of electronic traps in GaN-based devices limits device performance and reliability. Crystallographic defects in the bulk and electronic states on the surface act as trapping centers. We review the trapping phenomena in GaN-based high electron mobility transistors and discuss a characterization method, current transient spectroscopy, applied for trap identification. Probing the char...

Deep Submicron GaN-based Heterostructure Field Effect Transistors with InGaN Channel and InGaN Back-barrier Designs

We developed a double-recess etching process and a new Digital-Oxide-Deposition (DOD) technique to fabricate 180nm low-threshold GaN Metal-OxideSemiconductor Double Heterostructure Field Effect Transistors (MOS-DHFET). Two device layer structures, InGaN channel design and InGaN back-barrier design, were employed to improve the confinement of TwoDimensional Electron Gas (2DEG) and mitigate the s...