Memory cards

Details Memory cards Memory cards

G - Physics

11

C

352/57

G11C 11/34 (2006.01) G06K 19/02 (2006.01) G06K 19/077 (2006.01) H01L 23/60 (2006.01)

Patent

CA 1146272

ABSTRACT IMPROVEMENTS TO MEMORY CARDS In a plastic transaction card containing and integrated memory and data processing circuit, the circuit is surrounded by an electrostatic screen comprising an electrically-conductive polyurethane foam with a sufficiently high resistivity to avoid short-circuiting the circuit terminals, or a foil of metal or metallised plastic, or both. If the circuit is mounted using TAB (tape automated bonding), the screen can be formed by retention of part of the metallisation on the film substrate surrounding the circuit.

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