# US 2021/0279544 A1 · Prelaminate for an electronic card, and methods for producing such a prelaminate and an electronic card comprising such a prelaminate

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- Number: US 2021/0279544 A1
- Document ID: US20210279544A1
- Status: Published application
- Kind: A1
- Application number: 17/192,307
- Filed: 2021-03-04
- Published: 2021-09-09
- Earliest claimed: 2020-03-06
- Assignees: Idemia France
- Applicants: Idemia France
- Inventors: Philippe GAC; Pierre ESCOFFIER; Rémi LAVARENNE
- Web page: https://patentgrep.com/patent/US20210279544A1

## CPC

- G06K 19/07749: {the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card}
- H05K 3/02: in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- G06K 19/07754: {the connection being galvanic}
- H05K 1/0243: {Printed circuits associated with mounted high frequency components}
- H05K 1/0313: {Organic insulating material}
- H05K 3/043: {by using a moving tool for milling or cutting the conductive material}
- H05K 3/202: {using self-supporting metal foil pattern}
- H05K 3/4015: {using auxiliary conductive elements, e.g. pieces of metal foil, metallic spheres}
- H05K 1/183: associated with components mounted in and supported by recessed areas of the PCBs
- H05K 3/303: with surface mounted components (H05K3/32 takes precedence)
- H05K 2201/10098: Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas
- H05K 2201/10166: Transistor
- H05K 2203/0242: Cutting around hole, e.g. for disconnecting land or Plated Through-Hole [PTH] or for partly removing a PTH
- H05K 2203/166: Alignment or registration; Control of registration
- H05K 2203/175: Configurations of connections suitable for easy deletion, e.g. modifiable circuits or temporary conductors for electroplating; Processes for deleting connections
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present invention relates to a prelaminate for an electronic card, wherein at least a first group of pads is formed from a metal plate formed from a piece comprising a central part and branches extending from the central part, the branches of the metal plate forming the pads of the first group. The invention also relates to a method for producing such a prelaminate and an electronic card comprising such a prelaminate.

## Claims

### Claim 1

A prelaminate for an electronic card, comprising at least two substrates and at least a first group (30) of pads assembled between the two substrates, wherein the prelaminate comprises a metal plate (10) formed from a piece comprising a central part (11) and branches (12) extending from the central part (11), the branches (12) of the metal plate (10) forming the pads of the first group (30).

### Claim 2 (depends on 1)

The prelaminate according to claim 1, comprising at least a second group (31) of pads (32), at least one of the pads of the second group (31) being connected to one of the branches (12) of the metal plate (10) by a bonding wire (34).

### Claim 3 (depends on 1)

The prelaminate according to claim 1, comprising a second metal plate (10) formed from a piece comprising a central part (11) and branches (12) extending from the central part (11), the branches (12) of the second metal plate (10) forming the pads (32) of the second group (31).

### Claim 4 (depends on 1)

The prelaminate according to claim 1, comprising an antenna (33) having two ends, the two ends of the antenna (33) being connected to two of the branches (12, La, Lb) of the metal plate (10) of the first group (30).

### Claim 5

A method for producing a prelaminate, comprising:
A step for providing at least two substrates;
A step for providing a metal plate (10) formed from a piece comprising a central part (11) and branches (12) extending from the central part (11), the branches (12) forming a first group (30) of pads;
A step for positioning the metal plate (10) in relation to at least one first of the two substrates (21);
A step for laminating the at least two substrates, the metal plate (10) being between the two substrates.

### Claim 6 (depends on 5)

The method according to claim 5, wherein the step for positioning the metal plate (10) with at least the first of the two substrates (21) comprises a step for embedding the metal plate (10) in the first substrate (21).

### Claim 7 (depends on 5)

The method according to claim 5, further comprising a step for providing a second group (31) of pads (32), and a step for connecting at least one of the pads (32) of the second group (31) to one of the branches (12) of the metal plate (10) by a bonding wire (34).

### Claim 8 (depends on 5)

The method according to claim 5, further comprising a step for providing an antenna (34) having two ends, and a step for connecting the two ends of the antenna (34) to two of the branches (12, La, Lb) of the metal plate (10).

### Claim 9 (depends on 5)

A method for producing an electronic card comprising:
Method steps for producing a prelaminate according to claim 5; and
A machining step comprising at least a sub-step of removing the central part (11) of the metal plate (10) of the first group (30) of pads and a sub-step of stripping at least one of the branches (12) of the metal plate (10) forming a pad of the first group (30).

### Claim 10 (depends on 9)

The method according to claim 9, further comprising a step for providing two cover layers, and a step for laminating the prelaminate between the two cover layers arranged on either side of the prelaminate.

### Claim 11 (depends on 9)

The method according to claim 9, wherein the machining step further comprises a sub-step of removing a central part (11) of a metal plate (10) forming a second group (31) of pads (32) and a sub-step of stripping at least one pad (32) of the second group (31).

### Claim 12 (depends on 9)

The method according to claim 9, further comprising a step for inserting and for connecting a first module (40) to pads (12) of the first group (30).