Non-contact IC card having enhanced reliability
US7044388B2 · kind B2 · utility
11Cited by
3References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2002 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Sep 30, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.