Production of core for composite type magnetic head

Abstract

Abstract PURPOSE:To obtain a core for a magnetic head which exhibits excellent recording and reproducing characteristics even to a high-coercive force recording medium by embedding nonmagnetic materials into track width control grooves, then embedding prescribed magnetic metallic materials into track parts. CONSTITUTION:A 1st nonmagnetic material is packed into the butted and joined body of two ferrite blocks, by which a magnetic gap 6 having a prescribed spacing is formed. The 2nd nonmagnetic material 14 is embedded into the track width control grooves 10 formed in the direction orthogonal with the magnetic gap. Only the ferrite part near the gap 6 is removed and the magnetic metallic materials 26 is packed therein, following which medium traveling faces 16 are exposed by polishing, etc. Finally, the block is cut in the sections of the track width control grooves 10, by which the cores are obtd. The magnetic metallic materials are thereby made to exist only near the magnetic gap or in extremely small part of the medium traveling face and the loss of eddy current is decreased.

Inventors

• 👤 Motoichiro Matsuzawa
• 👤 Nobuhiro Terada
• 👤 Hideto Sandaiji

Bibliographic Details