Patent ID: 6591480
Filing Date: 2003-07-15
Classification: G11B,Y10T

Abstract:
A method for fabricating a flux concentrating stitched write head comprising:providing a substrate, which is a first part of a lower magnetic pole; forming on said first part a second part of a magnetic pole, said second part comprising a first portion and a second portion separated by a gap; forming a first dielectric layer over said second part such that said dielectric layer conformally fills the gap between said two portions; removing said dielectric layer from said two portions by a method of chemical mechanical polishing (CMP) but leaving said dielectric material to conformally fill the gap and to form an embedded step; forming a continuous write gap layer covering said first portion, said embedded step and part of said second portion but leaving a region of said second portion distal to said embedded step exposed; planarizing said write gap layer by the method of chemical mechanical polishing (CMP); forming an upper pole structure over said write gap layer and said exposed portion of the second part of the magnetic pole, wherein said upper pole structure comprises a front part formed on the write gap layer and a rear part formed on the exposed region of said second portion of the lower magnetic pole part; forming a second dielectric layer over said upper pole structure wherein said dielectric layer conformally fills the space between said front part and said rear part; removing said second dielectric layer from said upper pole structure by the method of chemical mechanical polishing (CMP) whereby said front part, said rear part and said second dielectric layer between said front and rear parts have a common planar upper surface and said dielectric layer conformally fills the space between said front and rear parts; forming an insulated inductive coil layer on said second dielectric layer; forming over said insulated inductive coil layer an upper pole yoke that magnetically connects said front and rear parts of said upper pole formation whereby a front edge of said yoke is recessed from the air bearing surface of said upper pole formation.