Patent ID: 6104269
Filing Date: 2000-08-15
Classification: H02K,Y10T

Abstract:
A method of making an array of magnets, comprising the steps of:placing a generally planar piece of magnetizable material on a piece of material with a magnetic permeability comparable to or greater than that of iron;placing, against a face of said piece of magnetizable material opposite said piece of high magnetic permeability material, a pair of coils;generating currents in said pair of coils, a direction of current in one of said pair of coils being opposite that of a direction of current in the other of said pair of coils;holding said pair of coils against said face of said piece of magnetizable material for a sufficient period of time to form a magnetized region; andmoving said pair of coils to a plurality of locations on said piece of magnetizable material and repeating said step of generating and said step of holding for each of the plurality of locations to form a translationally symmetric pattern of magnetized regions.