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EnglishThe behavior of medium voltage commercial power MOSFETs, first degraded with increasing c-rays doses and subsequently irradiated with heavy ions, is presented. It is shown that the degradation of the gate oxide caused by the c 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 c-rays, the amount of the critical voltage reduction is strictly related to the amount of the absorbed c-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 c-irradiated devices.
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| Titolo: | Behavior of power MOSFETs during heavy ions irradiation performed after γ-rays exposure |
| Autori: | |
| Data di pubblicazione: | 2012 |
| Rivista: | |
| Abstract: | The behavior of medium voltage commercial power MOSFETs, first degraded with increasing c-rays doses and subsequently irradiated with heavy ions, is presented. It is shown that the degradation of the gate oxide caused by the c 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 c-rays, the amount of the critical voltage reduction is strictly related to the amount of the absorbed c-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 c-irradiated devices. |
| Handle: | http://hdl.handle.net/11580/23509 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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