Mitsubishi Denki Kabushiki Kaisha

Ryoden Kasei Co., Ltd.

Masato Ohashi

Shiyoojiro Kodai

Shiyojiro Kodai

An identification card comprises a center core layer, a photograph embedded in the core layer, a first assembly of multiple layers laminated on the upper surface of the core layer and the photograph, and a second assembly of multiple layers laminated on the back surface of the core layer and the photograph. The layers of the first and second assemblies have substantially similar thermal expansion properties. Accordingly, the thickness of the identification card is uniform since the thickness of the core layer is substantially the same as the thickness of the photograph. High reliability can be obtained without any accompanying warp as a result of the substantially symmetrical arrangement of the first and second assemblies with respect to the core layer and the embedded photograph.

Identification card

An IC card has a laminated card body in which an IC module is housed. The card body is formed by lamination of a plurality of sheets, at least the sheet which contacts the bottom surface of the IC module being made of a synthetic paper having good flexing resistance. The remaining sheets are made of a rigid polyvinyl chloride. The card body is formed by conventional laminating processes.

Growing community of inventors

Sanda, Japan

Masato Ohashi