Patent ID: RE41301

Claim:
A micro-electronic component for a passive card without contact intended to be electromagnetically coupled to a remote station for the bidirectional transfer of data between the card and the station, said component comprising: a surface on a substrate of the component, said surface having a total surface area; processing means produced in integrated circuit technology on said surface of the component for processing a signal representative of transferred data, said processing means occupying a surface area substantially smaller than said total surface area; a coil for supplying a supply voltage to the processing means by induction and for inductive transfer with the station of said signal representative of data, the turns of said coil being produced in flat integrated technology by metallisation and engraved directly on said surface of the component in an area substantially unoccupied by the processing means; wherein the turns of the coil cover at least about 50% of said total surface area of the component and are produced on plural levels of metallisation ; and wherein the number of turns of the coil and the width of the turns are selected based, at least in part, on the yield of the supply voltage by induction, the total surface area of the component, the surface area occupied by the processing means, and the variation in voltage at terminals of the processing means during the bidirectional transfer of data.