Title
Behavior of power MOSFETs during heavy ions irradiation performed after γ-rays exposure.
Abstract
The behavior of medium voltage commercial power MOSFETs, first degraded with increasing gamma-rays doses and subsequently irradiated with heavy ions, is presented. It is shown that the degradation of the gate oxide caused by the gamma irradiation severely corrupt the SEE robustness and drastically modify the physical behavior of the device under test after the impact of a heavy ion. A decrease of the critical voltages at which destructive burnouts and gate ruptures appear has been detected in all devices previously irradiated with gamma-rays, the amount of the critical voltage reduction is strictly related to the amount of the absorbed gamma-rays dose. Furthermore, at the failure voltage, the behavior of the device is affected by the conduction of a current through the gate oxide. Moreover the SEGR of the device appears at lower voltages due to the reduction of the Fowler-Nordheim limit in the gamma-irradiated devices. (C) 2012 Elsevier Ltd. All rights reserved.
Year
DOI
Venue
2012
10.1016/j.microrel.2012.06.153
MICROELECTRONICS RELIABILITY
Field
DocType
Volume
Voltage reduction,Voltage,Power MOSFET,Irradiation,Electronic engineering,Time-dependent gate oxide breakdown,Gate oxide,Engineering,Ion,AND gate
Journal
52
Issue
ISSN
Citations 
SP9-10
0026-2714
0
PageRank 
References 
Authors
0.34
1
5
Name
Order
Citations
PageRank
G. Busatto15217.57
V. De Luca200.34
F. Iannuzzo310642.25
A. Sanseverino42511.27
F. Velardi53112.32