| 摘要 |
<p>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.</p> |
