Non-contact IC card having enhanced reliability
First Claim
1. A non-contact IC (integrated circuit) card having a combination of an antenna coil and an IC chip, which is connected to said antenna coil, said card comprising a first combination of a first antenna coil and a first IC chip, which Is connected to said first antenna coil, and a second combination of a second antenna coil and a second IC chip, which is connected to said second antenna coil, wherein said card comprises a pair of thin sheets which constitute an outer cover of said card, and wherein said first antenna coil and first IC chip are mounted on first face of a first one of said sheets and said second antenna coil and second IC chip are mounted on a first face of a second one of said sheets, wherein the first face of the first one of the sheets and the first face of the second one of to sheets are opposed and face one another, so that said first antenna coil and said first IC chip and said second antenna coil and said second IC chip are respectively sandwiched between said pair of thin sheets.
1 Assignment
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Accused Products
Abstract
To increase the reliability of a non-contact IC card for use in such applications as a door key, etc., two separate combinations of an IC chip and an antenna coil coupled to that chip are provided in the card, with each IC chip storing the same information, such as a key code. Since the probability of both of the IC chips being damaged concurrently due to application of external force is much smaller than the probability of failure of a single IC chip, the objective of enhanced reliability is effectively achieved.
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Citations
23 Claims
- 1. A non-contact IC (integrated circuit) card having a combination of an antenna coil and an IC chip, which is connected to said antenna coil, said card comprising a first combination of a first antenna coil and a first IC chip, which Is connected to said first antenna coil, and a second combination of a second antenna coil and a second IC chip, which is connected to said second antenna coil, wherein said card comprises a pair of thin sheets which constitute an outer cover of said card, and wherein said first antenna coil and first IC chip are mounted on first face of a first one of said sheets and said second antenna coil and second IC chip are mounted on a first face of a second one of said sheets, wherein the first face of the first one of the sheets and the first face of the second one of to sheets are opposed and face one another, so that said first antenna coil and said first IC chip and said second antenna coil and said second IC chip are respectively sandwiched between said pair of thin sheets.
- 12. A non-contact IC (integrated circuit) card having a combination of an antenna coil and an IC chip, which is connected to said antenna coil, said card comprising a first combination of a first antenna coil and a first IC chip, which is connected to said first antenna coil, and a second combination of a second antenna coil and a second IC chip, which is connected to said second antenna coil, wherein said card comprises a pair of thin sheets which constitute an outer cover of said card, and wherein said combination of a first antenna coil and first IC chip and said combination of a second antenna coil and second IC chip are mounted in common on one of said sheets with said first antenna coil and said first IC chip and said second antenna coil and said second IC chip respectively sandwiched between said pair of thin sheets.
Specification