MAGNETIC HEAD

摘要

PURPOSE:To eliminate the adverse influence of a pseudo gap and to provide high mass productivity by disposing the rugged parts on right and left magnetic cores in the positions asymmetrical with the head gap. CONSTITUTION:A striped resist film 31 is formed at the intervals P smaller than the track width of a video head on the surface A of a ferrite substrate 30 and is electrolytically etched to form a striped rugged surface A' of ferrite. An alloy magnetic material 31 having high saturation magnetic flux density is deposited on the surface A' to a suitable thickness and the surface is polished. Lancing grooves 35 are cut to ridges 34 to form successively track parts 36. The width of the track parts 36 is made qual to the track width W of the head. Glass 37 is melted and packed into the grooves 35 and the surface is finished by polishing to a specular surface. The substrate formed in such a manner and the substrate formed in the same manner and formed with a groove 38 for winding are made a pair. A gap forming material is formed onto the specular surface of at least one substrate to a prescribed thickness and both substrates are joined to constitute a gap bar having a gap 41. The grooves 35 are then cut approximately at the center thereof along the dotted lines 43 at the required angle with respect to the gap 41.