  A 100um thick silicon detector with 1mm2 pad readout optimized for
sub-nanosecond time resolution has been developed and tested. Coupled to a
purposely developed amplifier based on SiGe HBT technology, this detector was
characterized at the H8 beam line at the CERN SPS. An excellent time resolution
of (106+-1)ps for silicon detectors was measured with minimum ionizing
particles.
