A METHOD OF MANUFACTURING FLEXIBLE MAGNETIC TAPE

摘要

A method of manufacturing flexible magnetic tape having a permanently structured magnetic characteristic which varies from place to place in two different directions in the plane of the tape, includes: a) coating a flexible substrate with a slurry comprising anisotropic magnetic particles; b) moving the substrate and slurry coating relative to a first magnetic field having a field strength which varies with time in a first direction, thereby selectively orienting the said particles in areas spaced apart in a first direction; c) subsequently moving the substrate and slurry coating relative to a second magnetic field having a field strength which varies with time in a second direction making an oblique angle with the first direction, such that the said magnetic particles are selectively oriented in spaced areas in both said first and said further directions, and d) solidifying the slurry to fix the said particles in place.