A Giant Magneto-Resistive (GMR) sensor (900) having Current Perpendicular
to Plane (CPP) structure provides an extended first pinned layer (914) as
compared to second pinned layer (912) and free layer (910). Increased
magnetoresistance changes, increased pinning strength, increased thermal
stability, and decreased susceptibility to Electro-Static Discharge (ESD)
events is realized by maintaining equivalent current densities through
free layer (910) and second pinned layer (912), while decreasing the
relative current density through first pinned layer (914).