RFID transponders with paste antennas and flip-chip attachment
US6259408A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Nov 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3011
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio frequency transponder is provided which comprises a substrate layer, a radio frequency integrated circuit affixed to said substrate layer; and an antenna provided on said substrate layer in electrical connection with said radio frequency integrated circuit. The antenna is comprised of a conductive paste material having a resistivity of approximately 20 .mu..OMEGA.-cm., which is greater than the resistivity of a conventional etched copper antenna, but still sufficiently low to provide a radio frequency transponder having acceptable read range. The substrate layer further comprises a flexible organic material. The radio frequency integrated circuit is disposed in a flip-chip configuration facing downward toward said substrate layer, with electrical contacts aligned with the antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.