Title :
Experimental Study of Deep Levels in MESFETs
Author :
Meneghesso, G. ; Gasparetto, G. ; Paccagnella, A. ; Camin, D.V. ; Pessina, G. ; Fedyakin, N. ; Canali, C.
Author_Institution :
DEI, UniversitÃ\xa0 di Padova, via Gradenigo 6/A 35131 Padova, Italy
Abstract :
We have induced the formation of deep levels in the active channel of GaAs MESFET´s by exposing these devices to high fluence of energetic neutrons. A result, we have measured a modification of the main DC parameters, i.e. decrease of IDSS, gm and Vp. By using an experimental technique based on the frequency dispersion of the device transconductance, gm(f), we have been able to indentify at least one of the type of the defects (U-band) introduced in the GaAs substrate by irradiation.
Keywords :
Electrons; Frequency measurement; Frequency modulation; Gallium arsenide; Leakage current; MESFETs; Neutrons; Temperature; Transconductance; Voltage;
Conference_Titel :
Solid State Device Research Conference, 1996. ESSDERC '96. Proceedings of the 26th European
Conference_Location :
Bologna, Italy
