A perpendicular magnetic recording (PMR) head with single or double coil
layers has a small write shield stitched onto a main write shield. The
stitched shield allows the main write pole to produce a vertical write
field with sharp vertical gradients that is reduced on both sides of the
write pole so that adjacent track erasures are eliminated. From a
fabrication point of view, both the main pole and the stitched shield are
defined and formed using a single photolithographic process, a trim mask
and CMP lapping process so that the main shield can be stitched onto a
self-aligned main pole and stitched shield.