Patent ID: 7064924

Claim:
A method to manufacture a perpendicular magnetic writer, comprising: providing a magnetic yoke having a bottom surface and an exposed top surface, said bottom surface being magnetically connected to a return pole; providing a conductive coil that surrounds said yoke; depositing a lower layer of ferromagnetic material onto an area that includes said front surface; depositing a layer of non-magnetic material on said lower layer; depositing an upper ferromagnetic layer on said layer of non-magnetic material whereby there is no exchange coupling between said upper and lower ferromagnetic layers; patterning said upper and lower ferromagnetic layers, as well as said non-magnetic layer, to form a laminated write pole that extends from said yoke in the same direction as the return pole and that has a bottom surface that is coplanar with that of said return pole; and thereby causing said laminated write pole to have a residual flux density that is less than about 0.1 T.