Patent ID: 6274256
Filing Date: 2001-08-14
Classification: G11B,Y10S,Y10T

Abstract:
A combination type thin film magnetic head comprising:a writing head comprising a lower magnetic core layer and an upper magnetic core layer, said lower and upper core layers separated by a coil layer for inducing a recording magnetic field in both the lower and upper core layers; anda reading head comprising a magnetoresistive layer;wherein the upper core layer comprises a tip portion having a constant width starting from a facing portion facing onto a recording medium to the rearward direction which is distant from the recording medium, and a rear end portion which rearwardly becomes larger in width from the tip portion;wherein a length dimension of the tip portion having the constant width in the distant direction from the recording medium is in a range of 3.5 to 7.6 .mu.m; andwherein when a cross-sectional area of the tip portion is S, and a saturation magnetic flux density of a magnetic material consisting the upper core layer is Bs, the product of (S.times.Bs) is in a range of 1.5 to 10.5 T.multidot..mu.m.sup.2.