Contactless IC card

Details Contactless IC card Contactless IC card

1998-01-21

1999-12-07

Picard, Leo P.

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

343895, 235492, H05K 114, H01Q 136, G06K 19067

Patent

active

059994096

ABSTRACT:
The pattern line width of a coil is partially widened in a predetermined dimension and wiring patterns of a coil on the surface side and a coil on the rear side are arranged so as not to be in overlapped positions. Consequently, a direct current resistance of the coil can be reduced and an adverse influence by a self resonance of the coil on a communication can be reduced.

REFERENCES:
patent: 4795898 (1989-01-01), Bernstein et al.
patent: 5237165 (1993-08-01), Tingley, III
patent: 5399847 (1995-03-01), Droz
patent: 5424527 (1995-06-01), Takahira
patent: 5436441 (1995-07-01), Inoue
patent: 5598032 (1997-01-01), Fidalgo
patent: 5640004 (1997-06-01), Mardinian et al.

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