Patent ID: 8111479

Claim:
A magnetic write head for perpendicular magnetic data recording, comprising: a magnetic write pole having a trailing edge and having an end disposed at an air bearing surface; and a magnetic trailing shield located at the air bearing surface and adjacent to the trailing edge of write pole, the trailing shield being separated from the trailing edge of the write pole by a non-magnetic trailing gap layer and extending in a trailing direction a portion of the trailing shield being formed over a non-magnetic bump; wherein the non-magnetic bump causes the trailing shield to be formed with a notch at an end nearest the write pole, the notch defining a first throat height, measured from the air bearing surface to a beginning of the non-magnetic bump, and a second throat height, measured from the air bearing surface to a back edge of the trailing magnetic shield, the first throat height being smaller than the second throat height; wherein the non-magnetic trailing gap has a thickness (TG) and the notch has a height measured in the trailing direction that is 1-2 times TG.