| http://www.w3.org/ns/prov#value | - hen, in the step shown in FIG. 30, the third insulating layer 58 having a small film thickness and made of inorganic insulating materials, such as Al2O3 and SiO2, is formed all over the main magnetic pole layer 24 and the insulating layer 33. [0197] Then, in the step shown in FIG. 31, the third insulating layer 58 is partly removed to form holes 58 a, 58 b by using a resist layer (not shown).
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