| 摘要 |
A surface of a work piece, in which a plurality of magnetic head elements are formed on a substrate, is linearly ground. The surface is linearly ground by an outer circumferential face of a disk-shaped rotary grind stone. By the linear grind, linear grind traces are formed in the work piece. By selecting the direction of the grind traces, amount and direction of warping the work piece can be controlled. By making the direction of the grind traces parallel to a direction of cutting of the work piece to form a plurality of blocks, in each of which a plurality of magnetic head elements are arranged, stress in the blocks are released and the amount of warping of the blocks can be reduced.
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