| 摘要 |
PURPOSE:To improve the accuracy of polishing for gap depth restriction by forming a magnetic pole front edge having a width different from a magnetic pole width at the top of a magnetic pole tip to the magnetic pole tip of a magnetic substance layer. CONSTITUTION:The magnetic pole front edge 7 provided at a posite side to a connection part 4 of the 1st and 2nd both magnetic substance layers at the magnetic pole tip 5 of the magnetic substance layer is formed wider than the magnetic pole width at a prescribed value of the gap (l) from the front edge of the insulation layer 2 of the magnetic pole tip 5. The magnetic pole is polished while the width of magnetic pole is being observed at the gap restriction polish, the polishment is finished when the width reaches the magnetic pole width of the magnetic pole tip to obtain the magnetic pole tip with a prescribed depth. Thus, gap is obtained with high accuracy and the polish time is reduced. |
