公开(公告)号：JP2001273607A

公开(公告)日：2001-10-05

申请号：JP2001055070

申请日：2001-02-28

Applicant: IBM

Inventor： WEN-CHEN DAVID SHIAO ,  TERENCE TIN-LOCK LAMB ,  LEE EDWARD HINPONG ,  YANSHEN RUO ,  YUAN SAMUEL WONDER

IPC: G11B5/31 ,  G11B5/187 ,  G11B5/23 ,  G11B5/245

Abstract: PROBLEM TO BE SOLVED: To provide a magnetic head wherein the leakage of a magnetic flux passed through a surface gap is extremely small, and its manufacturing method, and a hard disk drive having the magnetic head loaded. SOLUTION: A magnetic head 38 has a first magnetic pole composed of double layers. This first magnetic pole has a first magnetic pole layer formed on a reading head element, and a second magnetic pole layer formed on the first magnetic pole layer. The second magnetic pole layer is formed to be a pattern so as to have an opening formed in the vicinity of the upper end position of a substantially formed second magnetic pole tip part 76. A surface gap distance between the upper end of a second magnetic pole tip part and the first magnetic pole layer 68 is increased, and the leakage of a magnetic flux crossing a surface gap 72 is reduced. According to one embodiment, the second magnetic pole layer, is provided as a single integrated formed layer having an opening. According to another embodiment, the second magnetic pole layer is formed as two independent parts having openings.