New Fowler-Nordheim Injection, Charge Neutralization, and Gamma Tests on the REM RFT300 RADFET Dosimeter

J. LIPOVETZKY; A. HOLMES-SIEDLE; M. GARCIA INZA; S. CARBONETTO; E. REDÍN; A. FAIGÓN

IEEE TRANSACTIONS ON NUCLEAR SCIENCE

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: New York; Año: 2012 p. 3133 - 3140

0018-9499

Through the injection of a Fowler-Nordheim tunnel current or the inversion of oxide fields during irradiation (Radiation-Induced Charge Neutralization), the oxide charge trapped in thick-oxide (300 nm) commercial RADFETs, often called QOT could be erased. Novel trapped-hole and interface characteristics were observed after treatments of this type at high doses. With both erasure techniques, it was possible only to neutralize a fraction of the oxide trapped charge. A non negligible amount of charge and border traps is deemed here to be ?intractable?. That adjective an a symbol, QIN, are introduced for the first time in this paper. Later sections discuss the possible impact of these results. The conclusion for dosimetry is that a ?reusable RADFET? dosimeter, working up to an unprecedented dose before wearing out, may be a practical possibility.