IC card having image information
First Claim
Patent Images
1. A card in which an IC (integrated circuit) chip is incorporated, said card comprising:
- a first base board and second base board constructed to form said card, said first base board having a Vicat Softening Point (°
C.);
an IC chip incorporated between said first base board and said second base board;
an image receiving layer onto which an ink image is transferred from an ink supply sheet by a thermal transfer method, said image receiving layer being disposed on an outside of said first base board; and
a cushion layer provided between said IC chip and said image receiving layer whereby said cushion layer smooths irregularities caused by said IC chip and improves a flatness of said image receiving layer, a softening point of said cushion layer being at least 10°
C. lower than that of said first base board, whereby said cushion layer is softer than said first base board.
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Abstract
An IC card in which an IC chip is incorporated between a first and second base boards, comprises an image receiving layer on which an ink image is transferred by a thermal transfer method and a cushion layer provided between the IC chip and the image receiving layer so that the cushion layer smooths irregularity caused by the IC chip and improves a flatness of the image receiving layer.
55 Citations
14 Claims
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1. A card in which an IC (integrated circuit) chip is incorporated, said card comprising:
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a first base board and second base board constructed to form said card, said first base board having a Vicat Softening Point (°
C.);an IC chip incorporated between said first base board and said second base board; an image receiving layer onto which an ink image is transferred from an ink supply sheet by a thermal transfer method, said image receiving layer being disposed on an outside of said first base board; and a cushion layer provided between said IC chip and said image receiving layer whereby said cushion layer smooths irregularities caused by said IC chip and improves a flatness of said image receiving layer, a softening point of said cushion layer being at least 10°
C. lower than that of said first base board, whereby said cushion layer is softer than said first base board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A card in which an IC (integrated circuit) chip is incorporated, said card comprising:
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a first base board and a second base board constructed to form said card, said first base board and said second base board having a tensile elastic modulus (ASTM D790) of 210 kgf mm-2 to 1020 kgm mm-2 ; an IC chip incorporated between said first base board and said second base board; an image receiving layer onto which an ink image is transferred from an ink supply sheet by a thermal transfer method, said image receiving layer being disposed on an outside of said first base board; and a cushion layer provided between said IC chip and said image receiving layer, said cushion layer having a tensile elastic modulus of 20 kgf mm-2 to 200 kgf mm-2, whereby said cushion layer is softer than said first base board, thereby smoothing irregularities caused by said IC chip and improving a flatness of said image receiving layer.
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Specification