Patent ID: 7173793

Claim:
A recording head, comprising: a first magnetic core; a second magnetic core arranged opposite to said first magnetic core; a recording gap formed by one end of said first magnetic core and one end of said second magnetic core; a magnetic couple formed by the other ends of said first and second magnetic cores; and a coil, insulated by an insulating material, between said first and said second magnetic cores, whereby magnetic fluxes of said first and said second magnetic cores excited by said coil and leaked from said recording gap are used for recording information onto a magnetic medium, wherein a yoke length between a front end of said recording head, in proximity of said recording gap, and a contact point of said magnetic couple, is not more than 20 Î¼m; wherein said magnetic material forming each one of said first and said second magnetic cores each opposing to each other, has a configuration in that a plurality of magnetic material layers are laminated with each other and further wherein, with respect to the yoke length L (unit: Î¼m), a total sum Î£ of a product of a saturation magnetization (unit: T) and the film thickness (unit: Î¼m) of the respective magnetic materials composing the respective magnetic cores, (Î£(saturation magnetization (T)Ã—film thickness (Î¼m)) ) satisfies the following relationship: 0.05 (T)Ã—yoke length L (Î¼m)+0.5 (T Î¼m)<=SIGMA(saturation magnetization (T)Ã—film thickness (Î¼m)).