M. Takai et al., ION-INDUCED CURRENT MEASUREMENT FOR OPTIMIZATION OF BURIED IMPLANTED LAYERS AGAINST SOFT ERRORS, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 96(1-2), 1995, pp. 425-428
Collection of charge carriers, generated by 2 MeV protons, in n(+)p di
odes with buried conductive layers, formed by high-energy B+ implantat
ion, has been investigated using nuclear microprobe (i.e., focused ion
beam) induced current-measurement. Suppression efficiency of generate
d charge carriers was found to depend on the implantation dose for bur
ied wells. About 20% of carriers generated by an incident ion beam cou
ld be suppressed by formation of a buried layer, while the suppression
rate by the buried layers was increased to about 60% by lowering the
applied reverse bias down to 1 V.