Patent ID: 7014532
Filing Date: 2006-03-21
Classification: B24B

Abstract:
1. A manufacturing method of magnetic head comprising the steps of: fitting a bar-like work having a plurality of magnetic heads and a plurality of resistive elements, that are lapped by a lapping surface of a lapping surface plate, to a lower surface of a lapping jig; connecting a plurality of pushing/pulling mechanisms, that push down and pull up the lapping jig in a vertical direction with respect to the lapping surface, to a plurality of operation points of the lapping jig; measuring individual reference bending curves of the pushing/pulling mechanisms when a reference pushing/pulling force is applied to the lapping jig while selecting one of the pushing/pulling mechanisms sequentially; measuring a current shape of a lower surface of the work; setting a target shape of the work; calculating a correction shape that is a difference between the current shape and the target shape; calculating one pushing/pulling curve that is most approximate to the correction shape, by multiplying respective reference bending curves of the plurality of pushing/pulling mechanisms by an optimization ratio individually and then superposing them; and adjusting heights of the magnetic heads by lapping the work, the magnetic heads, and the resistive elements by virtue of friction between the lapping surface and them, while pushing/pulling the lapping jig to/from the lapping surface by the plurality of pushing/pulling mechanisms by applying pushing/pulling amounts, that are derived by multiplying the plurality of reference bending curves by the optimization ratio individually, to the plurality of pushing/pulling mechanisms.