Patent ID: 7253990

Claim:
A magnetic write head comprising: an ABS and top and bottom poles separated by a write gap; said bottom pole further comprising: a first lower part having a first height, an outer surface that is coplanar with the ABS, and a first width; on said first lower part, a second lower part having a second height, a second width that is less than said first width, an outer surface that is coplanar with the ABS, and an opposing inner surface on said second lower part, a third lower part having a third height, a third width that is less than said second width, and an inner surface that is coplanar with that of said second part; on said third lower part, a fourth lower part having a fourth height, an inner surface that is coplanar with said second and third parts' inner surfaces, and an outer surface that is coplanar with the ABS, whereby a recess is present in the ABS; and a flux concentration sub-pole on said fourth lower part.