MAGNETIC HEAD AND ITS PRODUCTION

摘要

PURPOSE:To provide higher S/N by joining a front part magnetic core consisting of a thin magnetic metallic film directly to a rear part magnetic core consisting of a ferromagnetic oxide. CONSTITUTION:The thin magnetic metallic film 1 is formed on a core plate 10 consisting of the ferromagnetic oxide and a reinforcing plate 11 is adhered by crystallized glass 12, etc. to form a laminated plate. The plate is then cut orthogonally with the lamination face to form a slender core block of which the reinforcing plate side comes to the side of the surface for sliding with a recording medium. Notched grooves 3 are formed to this block from the sliding surface 12 to the gap surface 13 and glass 4 is packed therein. The gap surface 13 is polished and the opposite core blocks worked with a winding groove 6 are butted and adhered to each other. The joined block is so worked that an apex part 8 comes to the position of the joint face 7 between the thin film 1 and the core plate 10. A head chip is thereafter prepd. and is polished until the thin magnetic metallic film 1 is exposed. The magnetic head is thus produced.