Radio frequency identification transponder apparatus and method
US5574470A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1995 |
| Grant date | Nov 12, 1996 |
| Priority date | — |
| Expiry date | Oct 11, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/30107
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A transponder is formed of a very thin flexible substrate (10) on opposite sides of which are formed first (26) and second (31) series connected halves of a single antenna coil having ends connected to an integrated circuit die (50) mounted to a corner of the substrate. A plurality of bond pads (12a-12e) and programming pads (14a-14e) are also formed on the substrate and operatively connected to couple the antenna coils and the programming pads through the bond pads to the integrated circuit die. Unique configurations and arrangements of a die mounting site (46), bond pads (12a-12e), program pads (14a-14e), and vias (22,24) through the substrate enable an inexpensive simple construction. Protective laminates (58,60) on either side of the substrate are bonded to one another around the edges that circumscribe the substrate and also are bonded to one another at interior portions through a slot (20) formed in the substrate. In one embodiment narrow closely spaced coil turns are grouped in a perimetrical area of the substrate, leaving a large area in the center of the substrate free of antenna coil turns. The thin flexible substrate is stiffened in the area of the die and bond site by t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.