Contactless Module with Configurable Antenna Coil
AssigneeSealsq France
InventorsGhislain Boiron, Jean-Pierre Enguent
Life of this patent
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Abstract
A contactless module that includes a microcircuit connected to an antenna coil having turns of which the rank increases from the outside to the inside of the antenna coil, including an external turn of rank 1 and an internal turn of rank N, the internal turn being connected to an internal connection pad and the external turn connected to an external connection pad, wherein the antenna coil comprises, in a bypass area, at least one connection pad for connecting to a turn of rank greater than 1, to which the microcircuit can be connected.
Claims19
A method for producing a contactless module, the method comprising the steps of:
- depositing a first electrically conductive layer on a first face of an insert;
- forming an antenna coil by etching the first layer, the antenna coil comprising turns of increasing rank from the outside to the inside of the antenna coil, including an external turn of rank 1 and an internal turn of rank N, the internal turn being connected to an internal connection pad and the external turn being connected to an external connection pad;
- attaching a microcircuit to the first face of the insert, in a central area of the antenna coil bounded by a turn of the antenna coil;
- connecting first connection terminals of the microcircuit to connection pads of the antenna coil, via wires;
- in which method the external and internal connection pads of the antenna coil are formed in the central area of the antenna coil, the antenna coil comprising a bypass area in which each turn bypasses the external connection pad via the central area;
- wherein the conductive layer is etched in such a way that the antenna coil comprises, in the bypass area, at least one connection pad for connecting to a turn of rank greater than 1 to which at least one of the first connection terminals of the microcircuit is connected or can be connected.
A contactless module comprising:
- an insert comprising, on a first face, an antenna coil comprising turns of increasing rank from the outside to the inside of the antenna coil, including an external turn of rank 1 and an internal turn of rank N, the internal turn being connected to an internal connection pad and the external turn being connected to an external connection pad;
- a microcircuit attached to the first face of the insert, in a central area of the antenna coil bounded by a turn of the antenna coil, and comprising first connection terminals connected to connection pads of the antenna coil via wires,
- wherein the external and internal connection pads of the antenna coil are formed in the central area of the antenna coil, the antenna coil comprising a bypass area in which each turn bypasses the external connection pad via the central area,
- wherein the antenna coil comprises, in the bypass area, at least one connection pad for connecting to a turn of rank greater than 1 to which at least one of the first connection terminals of the microcircuit is connected or can be connected.
Dependencies are inferred from the claim text.