Patent ID: 8232630

Claim:
A contactless communication medium, comprising: a first substrate, a second substrate, an antenna formed on the second substrate, and an IC module connected to the antenna; wherein: the IC module has at least a lead frame, an IC chip mounted on the lead frame, and a mold part for sealing the IC chip; the first substrate has an opening for exposing the mold part; the second substrate has a hole or recessed part for accommodating at least the mold part, the hole or recessed part having an area size larger than the mold part; a sealing member having an insulating layer and an adhesive layer in a stacked manner is located so as to cover the mold part, the sealing member being bonded to the mold part via the adhesive layer; and where the sealing member has a transverse width × and a longitudinal width y, the hole or recessed part of the second substrate has a transverse width a and a longitudinal width b, and the first substrate has a thickness of d, at least one of the following expressions: x<a+ 2 d (1) and y<b+ 2 d (2) is fulfilled.