Patent ID: 7248221
Filing Date: 2007-07-24
Classification: G11B,H01Q

Abstract:
1. A radio tag antenna structure for an optical recording medium having an antenna structure comprising an antenna pattern on one surface of a dielectric member and a ground pattern on the other surface of said dielectric member, and attached to said optical recording medium having a dielectric layer and a metal layer on the side from which a laser beam does not come in, said radio tag antenna structure further comprising: a communication circuit chip which is to be connected to said antenna pattern being formed on a surface of said dielectric layer of said optical recording medium so that a ground terminal of said communication circuit chip is connected to said metal layer of said optical recording medium through a through hole formed in said dielectric layer of said optical recording medium, wherein said antenna pattern is formed on a surface of or inside said dielectric layer of said optical recording medium so that said metal layer (