Patent ID: 6600219
Filing Date: 2003-07-29
Classification: G06K

Abstract:
A non-contact data carrier device comprising an upper layer pattern having an antenna coil part made of wire pattern laid spirally and capacitor patterns and a lower layer pattern having, in a same way, an antenna coil part made of wire pattern laid spirally and capacitor patterns, wherein the respective antenna coil parts have almost the same external forms, wherein the upper and lower layer patterns are disposed on a surface and a back of a dielectric layer, respectively, in such a manner that at least the external forms of the upper and lower layer patterns accord with each other so that a resonance circuit is formed, characterized in that a part of each antenna coil part includes a portion which has the shape according with the external form of coil of a data carrier chip with on-chip coil and has a densely formed wire pattern, and that the data carrier chip is mounted on one of the portions of densely formed wire pattern in such a manner that the data carrier chip partially conforms to the external form of coil of the densely formed wire pattern.