A current-perpendicular-to-plane (CPP) spin valve (SV) sensor and
fabrication method with a contiguous junction type geometry that
increases sensor resistance by up to two orders of magnitude over
conventional CPP GMR geometry for a particular track read-width. The
superior CPP GMR coefficient (.delta.r/R) is implemented at an increased
sensor resistance by using two small self-aligned SV stacks disposed with
the sense current flowing perpendicular thereto when also flowing
parallel to the free layer deposition plane. With the CPP geometry of
this invention, thicker conductive spacer layers may be used without
unacceptable sense current shunting, so the two self-aligned SV stacks
may be completed following the free-layer track-mill step. The two SV
stacks may be connected in parallel or back-to-back in series to provide
different sense voltages.