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Electrically Erasable Metal–Oxide–Semiconductor Dosimeters

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3 Author(s)
Lipovetzky, J. ; Univ. of Buenos Aires, Buenos Aires ; Redin, E.G. ; Faigon, A.

Metal-oxide-semiconductor (MOS) dosimetry including the reset of the sensor device for its reuse (reutilization) is described. The method consists in restoring the shifted threshold voltage after irradiation to a predefined value by the injection of a Fowler-Nordheim tunnel current. The amount of interface states per unit area is initially saturated in order to ensure repeatability. The method was tested on 70 nm pMOSFETs exposed to a 60Co source. After successive irradiations and erasures amounting several tens of kGy[SiO2], the devices exhibit a dispersion smaller than 2% in the responses.

Published in:

Nuclear Science, IEEE Transactions on  (Volume:54 ,  Issue: 4 )

Date of Publication:

Aug. 2007

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