Shielded IC card

Details Shielded IC card Shielded IC card

1993-11-18

1995-12-19

Ledynh, Bot L.

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

235380, 235492, 361737, 361742, 361758, H05K 900, H05K 114

Patent

active

054774217

ABSTRACT:
An IC card is described which has a housing that is of low cost and which provides very good shielding against ESD/EMI (electrostatic discharge and electromagnetic interference), while securely holding a circuit board assembly and providing good contact with a ground conductor of the board. The housing comprises lower and upper housing halves (22, 24, FIG. 2), each molded of an electrically conductive polymer. The lower housing, half includes a bottom cover portion (90) and a pair of upstanding flanges (92, 94) that each forms part of a side of the housing. The upper housing half forms a top cover portion (100) and a pair of downwardly extending flanges (102, 104). The circuit board has a ground conductor (70) at its periphery which is trapped between the upper and lower housing halves to securely hold the circuit board in place and to electrically ground its ground conductor. Each housing half has platform parts (114, 116, 120, 122) that engage corresponding surfaces of the circuit board. The platform parts are staggered along the length of each housing side, to slightly bend each circuit board side and thereby hold the circuit board in place while assuring good electrical contact therewith.

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