Contactless IC card
First Claim
1. A contactless IC card having an IC circuit and an antenna coil and for transferring power, the antenna coil in the contactless IC card being formed by printing,wherein the antenna coil in the contactless IC card generally lies along a plurality of first directions and a plurality of second directions, the first and second directions being perpendicular to each other, and a line width of the antenna coil along the first directions is greater than a line width of the antenna coil along the second direction.
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Accused Products
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.
32 Citations
18 Claims
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1. A contactless IC card having an IC circuit and an antenna coil and for transferring power, the antenna coil in the contactless IC card being formed by printing,
wherein the antenna coil in the contactless IC card generally lies along a plurality of first directions and a plurality of second directions, the first and second directions being perpendicular to each other, and a line width of the antenna coil along the first directions is greater than a line width of the antenna coil along the second direction.
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5. A contactless IC card having an IC circuit and an antenna coil connected to said IC circuit, wherein said coil comprises:
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a first portions positioned along a plurality of first direction and a plurality of second portions positioned along a second direction which is perpendicular to the first direction, wherein a pitch of the coil in the first portions is larger than a pitch of the coil in the second portions and the coil in said first portions has a larger width than the coil in said second portions. - View Dependent Claims (6, 7, 8, 9, 10)
wherein the width of the coil in the third portion is greater than the width of the coil in the second portion.
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11. A contactless IC card having an IC circuit and an antenna coil connected to said IC circuit, wherein said coil comprises:
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a first portions positioned along a plurality of first direction and a plurality of second portions positioned along a second direction which is perpendicular to the first direction, wherein the coil in said first portions has a larger width than the coil in said second portion. - View Dependent Claims (12, 13, 14, 15, 16)
wherein the width of the coil in the third portion is greater than the width of the coil in the second portion.
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- 17. A contactless IC card having an IC circuit and an antenna coil formed during a printing process with a single material, the antenna coil being connected to the IC circuit and comprising a first portions positioned along a plurality of first direction and a plurality of second portions intersecting the first portion and positioned along a second direction different from the first direction, the width of the coil in the first portions being greater than the width of the coil in the second portions.
Specification