Method for producing a metal radio-frequency chip card with improved electromagnetic permittivity
US11501127B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2019 |
| Grant date | Nov 15, 2022 |
| Priority date | — |
| Expiry date | Dec 6, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07773
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for producing a metal insert for a radio-frequency chip card includes the steps of forming or providing an assembly comprising an insulating substrate bearing: at least one antenna coil resting on the substrate, comprising a connection interface to a radio-frequency module, a metal plate comprising radio-frequency permittivity perforations and a cavity for receiving a radio-frequency chip module, respectively arranged facing the antenna coil and its connection interface. The perforations comprise at least two longitudinal slots extending along and facing a portion of the antenna coil, each slot also opening onto the edge of the plate via a passage arranged on the edge. The invention also relates to a corresponding card produced by the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.