A microstrip silicon detector SVX II has been proposed for the
upgrade of CDF to be installed in 1999 for Run II of the Tevatron.  Three
barrels of five layers of double-sided silicon microstrip detectors will cover
the interaction region.  A description of the project status will be
presented.  Emphasis will be given to the R&D program for silicon sensors
which includes capacitance minimization, the study of coupling capacitor
integrity, the operation of the detectors inconjunction with the SVXH and SVX2
readout chips in two beam tests and the determination of the detectors
performance deterioration due to radiation damage.