Radio frequency identification device in polycarbonate and its manufacturing method
AssigneeAsk S.A.
InventorCarina Zambon
Life of this patent
Estimating the term…
Abstract
The invention concerns a method for manufacturing a radio frequency identification device (RFID), featuring a flat and flexible substrate made of polycarbonate equipped with an antenna (14) composed of conductive ink fully encased in the polycarbonate and a chip or integrated circuit module (29) connected to the antenna, the antenna formed by the winding of several turns features a turn overlap zone, an insulating strip of dielectric material separating the turns of the antenna in the overlap zone, the edges of the device being completely uniform so that no lines of demarcation between the various layers are visible, thereby preventing all attempt of delamination of the device over its thickness.
Claims10
A method for manufacturing a radio frequency identification device (RFID) comprising a flat substrate equipped with an antenna (14) and a chip (25) connected to the antenna, said antenna formed by the winding of several turns (11) comprises a zone where the turns overlap, an insulating strip (16) of dielectric material separating the overlaid antenna turns where they overlap, the method including the following steps:
- a) producing the antenna consisting in printing turns, two contacts (17, 18) of conductive ink and an insulating strip (16) made of dielectric material at the location where the turns overlap, and in subjecting said substrate to heat treatment in order to bake said ink,
- b) connecting said chip (25) to said substrate (10) of the side of said antenna (14),
- c) overlaying a second layer (20) on said substrate on the side of the antenna, this second layer comprising a first perforation (39) centered on the chip and a second perforation (26) centered on said insulating strip (16) of antenna overlap zone,
- d) overlaying a third layer (30) on the second layer,
- e) laminating the three layers together (10, 20, 30),
- wherein said second perforation (2) passes through an entire thickness of said second layer (20) and
- wherein step a) includes the following steps:
- a1) printing an undercoat (12) comprising an ink, resin or varnish on a predetermined zone on said antenna support substrate (10), said zone corresponding to an imprint of the antenna or being slightly larger than it, and
- a2) printing the antenna on said undercoat (12).
Dependencies are inferred from the claim text.