Patent ID: 6376063
Filing Date: 2002-04-23
Classification: B22F,C22C,C25C,C25D,H01F,Y10S,Y10T

Abstract:
A method for making magnetic particulates containing cobalt, iron, or both, having high magnetic permeability and controlled dimensions in the form of flakes having a controlled thickness within a narrow thickness distribution, comprising the steps of:(a) electroplating a substantially uniformly thick layer of particulate onto a cathode from an electrolyte, the thickness of the layer being in the range from about 0.1 &mgr;m to 1.0 &mgr;m; (b) separating the layer from the cathode to define flakes in the electrolyte having a size on the order of (no more than about 0.001 inch long)Ã—(no more than about 0.001 inch wide)Ã—(the desired thickness); and (c) separating the flakes from the electrolyte.