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The effects of radiation on AlxGa1-xN/GaN MODFETs is an area of increasing interest to the USAF as these devices become developed and integrated in satellite-based systems. Irradiation is also a valuable tool for analyzing the quantum-level characteristics and properties that are responsible for device operation. AlxGa1-xN/GaN MODFETs were fabricated and irradiated at liquid nitrogen temperatures by 0.45 -1.2 MeV electrons up to doses of 6??1016 e /cm2. Following irradiation, low temperature I-V measurements were recorded providing dose-dependent measurements. Temperature-dependent I-V measurements were also made during room temperature annealing following irradiation. I-V measurements indicate radiation-induced changes occur in these devices creating increased gate and drain currents. These increased currents are only maintained at low temperatures (T greater than 300 K). It is believed that the increase in gate current is caused by an increase in the electron trap concentration of the AlxGa1-xN layer. This increase in trap concentration directly increases the trap-assisted tunneling current resulting in the observed increase in gate current. The mechanism causing the increase in drain current is unknown. Several theories explaining this increase are presented along with the additional research necessary to illuminate the correct theory. This is the first experiment involving electron radiation of AlxGa1-xN/GaN MODFETs.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
