Contactless IC card
US5999409A · kind A · utility
32Cited by
7References
11Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 21, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Jan 21, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K1/16
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.