Method of manufacture of IC contactless communication devices
A method of manufacture of an electrical bridge including the following steps: (a) providing a first flexible electrically insulating material, (b) laminating a pattern of a second electrically conductive material, on the first material, (c) separating a strap having a connection portion formed from the pattern of electrically conductive material.
1. A method for manufacturing an electrical bridge comprising the following steps:
(a) providing an elongated band of a first flexible electrically insulating material,
(b) laminating, in a plurality of locations of the band, a pattern of a second electrically conductive material, on the first electrically insulating material,
(c) separating, from each location, a strap so that said strap comprises:
a first layer of the first electrically insulating material,
a second layer of the second electrically conductive material,
at least a first connection portion formed from the second layer having a first free face made of the second electrically conductive material only, and a second free face made of the second electrically conductive material only opposite to the first free face regarding a thickness direction (Z_ of the strap, and
at least a second connection portion,
where a portion of the first layer of the first electrically insulating material extends between the first and second connection portions.
2. Method according to claim 1 , wherein the second connection portion is formed from the second layer having a first free face and a second free face opposite to the first free face with respect to a thickness direction (Z) of the strap.
3. A method according to claim 1 wherein,
at step (a), the band is provided with a through hole disposed along the thickness direction (Z) in each location,
at step (b), the pattern at least partly covers the through hole, and
at step (c), the strap is separated from the band.
4. A method according to claim 1 , wherein at step (b), the laminated pattern is a band of metal comprising first and second portions which are to be the first and second connection portions of the strap.
5. A method according to claim 1 , wherein at step (b), the laminated pattern comprises at least a first and a second bands of metal, electrically insulated from one another, and wherein each band of metal comprises a respective portion which is to become the respective first and second connection portions of the strap.
6. A method according to claim 1 , wherein, at step (b), the pattern is laminated with a recess outside the connection portions.
7. A method according to claim 1 , wherein, at step (b), the laminated pattern is a band of metal comprising first and second portions which will become the first and second portions of the strap.
8. A method for electrically connecting two connection portions of an antenna comprising the step of:
(a) providing an elongated band of a first flexible electrically insulating material,
(b) laminating, in a plurality of locations of the band, a pattern of a second electrically conductive material, on the first electrically insulating material,
(c) separating, from each location, a strap so that said strap comprises:
a first layer of the first electrically insulating material,
a second layer of the second electrically conductive material,
at least a first connection portion formed from the second layer having a first free face made of the second electrically conductive material only, and a second free face made of the second electrically conductive material only opposite to the first free face regarding a thickness direction (Z) of the strap, and
at least a second connection portion,
where a portion of the first layer of the first electrically insulating material extends between the first and second connection portions,
(i) providing, in relation to each strap, an antenna having first and second distant connection portions,
(ii) assembling the first free face of the first connection portion of the strap and the first connection portion of the respective antenna in an electrically conductive manner, and assembling the second connection portion of the strap and the second connection portion of the respective antenna in an electrically conductive manner.
9. A method according to claim 8 , wherein, step (i) comprises providing, in relation to each strap, a card body comprising a card substrate carrying a coil having at least one turn, forming said antenna.
10. A method according to claim 9 wherein, at step (ii), the first layer is placed between the second layer and the card substrate.
11. A method according to claim 8 , further comprising a step of electrically connecting an IC-chip to the antenna.
12. A method according to claim 11 , wherein, at step (iii), the chip is mechanically directly attached to the strap, the chip having first and second electrical connection portions respectively electrically connected to the first and second band of metals.