Patent ID: 8472138

Claim:
A magnetic pole suitable for perpendicular magnetic recording, comprising: a substrate having a top surface; said magnetic pole having a first surface that is normal to said substrate top surface, said first surface also being collinear with an edge of said substrate; said magnetic pole having at least three additional surfaces that are disposed to lie in planes that are normal to said first surface; each of said additional surfaces being coated with a layer of non-magnetic material, one of said layers of non-magnetic material serving as a bonding layer between said magnetic pole and said substrate top surface; each of said layers of non-magnetic material having a precise and predetermined thickness; on said substrate, a layer of soft magnetic material that fully contacts all of said layers of non-magnetic material, thereby serving as a magnetic side shield for said write pole; and in consequence of said non-magnetic layers having precise and predetermined thicknesses, said perpendicular magnetic recording head is symmetrically located relative to said magnetic side shield whereby said perpendicular magnetic recording head has minimal fringe effects and minimal side erasure.