| 摘要 |
<p>A data processing system is provided in the approximate dimensions of a conventional credit card. Also disclosed is a method of forming such a system. The system comprises a rigid, electrically insulating, thermally conductive carrier layer (34) having a lead pattern (40) etched on one or both faces. The rigid carrier layer (34) is laminated with a second, flexible layer (16), or possibly sandwiched between two such flexible layers, upon which are mounted circuit chip devices (14) which are connected to the lead pattern(s) to provide a logic circuit. Preferably at least one of the circuit chips (14) is an electrically erasable programmable read only memory device, and the lead pattern (40) extends to the edge of the card to provide input terminals (36) connectable to an outside supply. The flexible layer(s) carrying the circuit chip devices (14) and the rigid carrier layer (34) carrying the lead pattern(s) (40) are hermetically sealed between two outer laminating layers (42, 44). Preferably the edge of the thermally conductive rigid carrier layer (34) is exposed at the edge of the card to assist heat dissipation.</p> |
