Patent ID: 8268092
Filing Date: 2012-09-18
Classification: G06K,H01Q

Abstract:
1. A method of manufacturing a multi-layered magnetic sheet for a radio frequency identification antenna, the method comprising the steps of: preparing first and second magnetic sheet layers made of alloy powder including at least one kind of an amorphous alloy selected from the group consisting of Fe—Si—B, Fe—Si—B—Cu—Nb, Fe—Zr—B, and Co—Fe—Si—B, the first and second magnetic sheet layers are made by the steps of mixing amorphous alloy powder including at least one kind of an amorphous alloy selected from the group consisting of Fe—Si—B, Fe—Si—B—Cu—Nb, Fe—Zr—B, and Co—Fe—Si—B and a resin for a binder, and depositing the mixture on a base member in the form of a thin film and then drying the base member to form a dried magnetic sheet layer; preparing a first amorphous alloy ribbon made of one kind of the amorphous alloys, the first amorphous alloy ribbon made by melt-spinning process; and laminating the first amorphous alloy ribbon between the first and second magnetic sheet layers and then compression-molding the laminated multi-layered magnetic sheet to increase a relative density of the laminated magnetic sheet and simultaneously form microcracks on the first amorphous alloy ribbon.