Patent ID: 7517463

Claim:
A method for fabricating a thin film perpendicular write head comprising: fabricating a magnetic pole layer, said magnetic pole layer having a first portion and a second portion; depositing a first non-magnetic gap layer on said first and said second portions of said magnetic pole layer, said first non-magnetic gap layer being resistant to etching in solutions having a pH less than 7; depositing a second non-magnetic gap layer on said first non-magnetic gap layer deposited on said first and said second portions of said magnetic pole layer, said second non-magnetic gap layer being resistant to etching in solutions having a pH greater than 7; covering said second non-magnetic gap layer deposited on said first portion of said pole layer with a photo resist layer; removing said second non-magnetic gap layer deposited on said second portion of said magnetic pole with a solution having a pH of less than 7, without damaging said photo resist layer; and, removing said first non-magnetic gap layer deposited on said second portion of said magnetic pole layer with a solution having a pH greater than 7, without damaging said second portion of said magnetic pole.