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Study of breakdown effects in silicon multiguard structures

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14 Author(s)
Da Rold, M. ; Dipt. di Fisica, Padova Univ., Italy ; Bacchetta, N. ; Bisello, D. ; Paccagnella, A.
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The purpose of this work is to study layout solutions aimed at increasing the breakdown voltage in silicon micro-strip detectors. Several structures with multiple floating guards in different configurations have been designed and produced on high-resistivity silicon wafers. The main electrical characteristics of these devices have been measured before and after irradiation. Both radiation-induced surface and bulk damage effects were considered as well. The highest breakdown voltage was found on devices featuring p+ guards without field plates. A simulation study has been carried out on simplified structures to evaluate the distribution of the breakdown field as a function of the guard layout. The aim was design optimization

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Nuclear Science, IEEE Transactions on  (Volume:46 ,  Issue: 4 )