Several diodes with different multi-guard ring structures were fabricated f
rom 10 k Ohm cm p-type bulk material. Studies on the performance of such de
vices are presented here. They include the measurement of the leakage curre
nt, breakdown voltage and charge collection efficiency before and after 2 x
10(14) p/cm(2) irradiation with 63.3 MeV kinetic protons. (C) 1999 Elsevie
r Science B.V. All rights reserved.