Patent ID: 7193814

Claim:
A method to form a magnetic write head for high track density applications, comprising: providing a lower pole piece that further comprises a write-coil in a coil well, said coil well being filled with insulation and having a top surface; depositing on said top surface a seed layer having a magnetic moment of at least 24 kilogauss; forming, in said seed layer, a trench that extends down as far as said top surface and that has sloping sidewalls; just filling said trench with a layer of a non-magnetic metal; forming, a photoresist mold whose floor is said seed layer and then electroplating, a write gap layer on said floor whereby said write gap layer overlaps both said seed layer and said layer of a non-magnetic metal; then forming, through electroplating onto said write gap layer, an upper pole piece and then removing all photoresist; and forming a back gap piece that is in magnetic contact with said seed layer and with said upper pole piece and that does not overlap said write gap layer.