| 摘要 |
A plating film formation method used for forming an upper magnetic pole (30) of an induction write head (26) for use in a magnetic disk apparatus, for example, comprising the step of removing a part of a plating base (42) formed on a gap layer (31) to expose the surface of the gap layer (31), and the step of growing a plating from the plating base (42) to form a plating film (44) on the exposed surface of the gap layer (31). When an excessive plating base (42) around the plating film (44) is removed by an ion mill, for example, the plating base (42) is removed prior to the formation of the plating film (44) from the portions in the shade (55) of the plating film (44) which an ion beam (54) cannot reach easily. As a result, the upper magnetic pole (30) can be formed in accordance with a predetermined pattern. A write gap having a desired tip width of the magnetic pole can be provided, and a recording track density can be improved on the magnetic disk.
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