Patent ID: 6191917
Filing Date: 2001-02-20
Classification: G11B

Abstract:
A thin film write head for writing a write-equalized digital data stream onto magnetic tape, the write-equalized data stream comprising data transitions and equalization pulses, wherein the data transitions occur at a frequency no greater than a data frequency and wherein each equalization pulse is a signal written at an equalization frequency, the equalization frequency much greater than the data frequency, the thin film write head comprising:a top pole;a bottom pole;a conductive coil disposed between a first portion of the top pole and the bottom pole, the top pole, bottom pole, and conductive coil forming an electromagnet operative to write the write-equalized digital data stream onto the magnetic tape by converting an input current through the conductive coil into a head field, the input current magnitude for data transitions expressed as a data transition amplitude; andan insulating gap layer disposed between a second portion of the top pole and the bottom pole, the top pole, the bottom pole and the gap layer forming a gap in the electromagnet, the head field generated across the gap, the gap having a gap depth causing saturation to write current at the data frequency and data transition amplitude,wherein, for an amplitude of equalization pulses substantially the same as the data transition amplitude, the gap depth result in substantially the same head field amplitude for equalization pulses as for data transitions.