| 摘要 |
A magneto-resistance effect type head (MR head) is formed of a laminated structure by using a thin film forming technique. In the magneto-resistance effect type head, an insulating layer, a lower shield layer, a lower gap layer, a magnetic resistance effect layer, an upper gap layer, an upper shield layer, and a protective layer are layered in sequence on one end of a base plate. A fine concave-convex portion is formed by means of etching on one end face of the base plate of which side is adjacent to the insulating layer so that the insulating layer can strictly be adhered to the base plate. The concave-convex portion is formed by means of ion etching using Argon gas or the like so as to be a surface roughness in the range of 1 to 100 nm.
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