Patent ID: 8446689
Filing Date: 2013-05-21
Classification: C25D,G11B

Abstract:
1. A process for manufacturing a magnetic writer having a high data rate, comprising: providing a lower field coil embedded within a non-magnetic dielectric layer having a first top surface; forming in said first top surface a cavity having internal walls, one of said internal walls being a sloping wall that subtends an angle of about 30 degrees relative to said first top surface; depositing a write gap layer on said internal walls; then forming a mask that covers all of said write gap layer except an upper portion of said sloping wall; then electrodepositing a magnetic pole tip layer on said upper portion of said sloping wall, said magnetic pole tip layer having a saturation magnetization in a range of from 20 k to 24.5 k Oe and a magnetic damping constant of 0.05 to 0.5; once said magnetic pole tip layer has reached a thickness in a range of from 0.1 to 0.5 microns, terminating electrodeposition and then removing all of said mask; then over-filling said cavity with a material that is suitable for a main pole, that has a magnetic damping constant in a range of from 0.05 to 0.5, and that has a saturation magnetization of 19k to 24.5k, thereby forming a main pole; then planarizing until a second top surface of said magnetic pole tip layer is exposed, said second top surface being coplanar with a third top surface of said main pole, thereby forming a stitched pole tip that extends upwards from said write gap layer by an amount that is in a range of from 0.1 to 1 microns; and forming, on said second top surface, a top yoke, a write yoke, and an upper field coil.