Various types of silicon mono-crystals (epitaxial of different thickness, s
tandard and oxygenated float zone material) have been grown and processed w
ith mesa and planar technologies to produce 5 x 5 mm(2) pad detectors. The
detectors have been irradiated with 24 GeV/c protons. Electrical properties
of the detectors have been studied, before and after irradiation, in order
to find the correlation with the material type, the fabrication process an
d the radiation hardness.