Patent ID: 6795271
Filing Date: 2004-09-21
Classification: G11B

Abstract:
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 &mgr;m; and wherein with respect to the yoke length, a product of a saturation magnetization of said first and second magnetic cores, and the film thickness of the magnetic materials composing each of said first and second magnetic cores, respectively, satisfies: 0.05(T)Ã—yoke length L (&mgr;m)+0.5(TÂ·&mgr;m)&lE;saturation magnetization (T)Ã—film thickness (&mgr;m).