UNIFORM CHARACTERISTIC FERRITE PLATE AND MANUFACTURING METHOD FOR THE SAME

PROBLEM TO BE SOLVED: To provide a uniform characteristic ferrite plate obtained by successively laminating a ferrite, a self-adhering layer and a plastic film, with a uniform inductance across the entire area. SOLUTION: The laminate obtained by laminating a plate-like sintered ferrite, a double-side self-adhering tape and a PET film, is sandwiched between two pieces of rubber sheet, on both sides in the lamination direction, and rolled horizontally (direction along the plane) by allowing the laminate to pass through the clearance formed by a biaxial roll. Before and after the rolling process, the inductance is measured at the positions A and E of both ends of the laminate, the position C of the center of the laminate, etc. Compared with the inductance (A) before the rolling process, the inductance (B) after the rolling process shows that the inductance at the position C of the center etc. is lowered down to the level in the neighborhood of the inductance at the positions A and E, etc. of both ends of the laminate. Thus, the inductance is equalized over the entire area. Also, the density is reduced by 0.9%. COPYRIGHT: (C)2011,JPO&INPIT