| 摘要 |
PURPOSE:To prevent the leak of magnetic flux and to eliminate a false gap action by eliminating a work degenerated layer of a ferrite in the joint boundary part between the ferrite and a magnetic alloy film of a high saturation magnetic flux density, which is formed on the ferrite, to form a magnetic gap. CONSTITUTION:Flat parts 21 narrower than a prescribed track width tw and V-shaped grooves 22 are provided on the joint surface of each of two core part pieces 20 and 20' consisting of a high-permeability ferrite, and a winding groove 23 is formed in one core part piece 20', and a magnetic alloy film 24 of a high saturation magnetic flux density is formed on the joint surface of each part piece. After nonmagnetic packing layers 26 consisting of a high-melting point glass or the like are formed in grooves 22, and both part pieces 20 and 20' are so assembled that gaps 27 are constituted while projecting to hill shapes, thus obtaining magnetic heads. In this assembling, alloy films 24 are formed after work degenerated layers, which are generated when grooves 22 are formed, on surfaces of grooves 22 of core pieces 20 and 20' are removed by etching with an aq. solution of a phosphoric acid. An alloy whose magnetic permeability is equal to or higher than that of ferrite part pieces 20 and 20' is used as materials of films 24. Thus, an excellent magnetic head is obtained where false gaps are not generated in joint parts parallel with the gap 27 though different kinds of magnetic materials are joined to each other. |
