RELATION BETWEEN SPACING LOSSES AND LEVEL DIFFERENCES IN LAMINATED FILMS HEADS

A reproduced voltage and the surface level difference between magnetic metal layers and substrates were measured directly, During the measur ement of reproduced voltage,the level difference grows depending on th e characteristics of the magnetic tape. The spacing loss is proportion al to the level difference. Therefore the level difference is one of t he most important cause of the spacing loss. The same results are foun d in various magnetic tapes. The spacing losses in recording and in re producing were measured separately and were found to be proportional t o the level difference. The spacing loss factor in reproducing is abou t two times larger than in recording.