Patent ID: 7120989

Claim:
A process to form a magnetic write head, including a stitched write shield and a main pole comprising: forming a first magnetic disk on a substrate and abutting said first magnetic disk with a first layer of insulation with which the first magnetic disk and the first layer of insulation each share a first common top surface; depositing a non-magnetic write gap layer on said first common top surface; forming on said write gap layer a second magnetic disk and abutting said second magnetic disk with an end point detection layer with which the second magnetic disk and the end point detection layer each share a second common top surface; forming on said second common top surface a hard mask that defines, within said magnetic disks, the stitched write shield and main pole; then removing all material not covered by the hard mask down as far as said substrate, thereby forming a cavity; overfilling said cavity with a second layer of insulation and then performing a first CMP step until said end point detection layer is just exposed, thereby also just exposing said second magnetic layer and thus forming thereform said stitched write shield; and then performing a second CMP step until said stitched write shield has been given a desired thickness.