Radio frequency identification tags and labels
US6147662A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1999 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | Sep 10, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/01087
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Radio frequency identification elements, including linerless or lined labels, are produced with enhanced effectiveness. The antenna is printed with conductive ink or toner, and cross-over may be provided by spot printing a non-conductive material over a portion of the antenna and then printing a conductive cross-over element on the non-conductive material. Typically the antenna is printed on one face of a web, and the radio frequency identification chip is moved into contact with the opposite face of the web so that the contacts penetrate the web and engage the antenna so that the web material acts as a dielectric. Alternatively part of the antenna on the first face may be over-printed with a non-conductive material and the chip attached to the first face passing through openings in, or penetrating, the non-conductive material to engage the antenna. A protective substrate or coating is provided on at least one of the chip and antenna, for example by heating heat expandable microspheres, or applying a substrate having hot melt adhesive. The antenna may be printed with a printing media comprising a carrier including resin and wax and containing conductive material in it, and by heati…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.