Patent ID: 6317291
Filing Date: 2001-11-13
Classification: B82Y,G11B

Abstract:
A thin-film magnetic head comprising:a medium facing surface that faces toward a recording medium;first and second magnetic layers magnetically coupled to each other and including magnetic pole portions that are opposed to each other and placed in regions on a side of ends of the magnetic layers facing toward the recording medium, the magnetic layers each being made up of at least one layer;a gap layer provided between the pole portions of the two magnetic layers; anda thin-film coil placed between the magnetic layers, being insulated from the magnetic layers; whereina distance between the medium facing surface and an outermost end of the coil in a direction parallel to surfaces of the gap layer is greater than a throat height and measures 8 .mu.m or less, andat least when data is written at a frequency of 180 MHz, the magnetic head exhibits a nonlinear transition shift of 20% or less and an overwrite property of 30 dB or more.