METHODS AND APPARATUS FOR MANUFACTURING A PLURALITY OF ELECTRONIC CIRCUITS

Abstract

The present invention relates to a method and apparatus for manufacturing a plurality of electronic circuits, each electronic circuit comprising a respective flexible first portion, comprising a respective group of contact pads (contacts), and a respective flexible integrated circuit, IC, comprising a respective group of terminals and mounted on the respective group of contact pads with each terminal in electrical contact with a respective contact pad, the method comprising:

providing (e.g. manufacturing) a flexible first structure comprising the plurality of first portions;

providing (e.g. manufacturing) a second structure comprising the plurality of flexible ICs and a common support arranged to support the plurality of flexible ICs;

dispensing an adhesive onto the first structure and/or onto the flexible ICs;

transferring said flexible ICs from the common support onto the flexible first structure such that each group of terminals is mounted on (brought into electrical contact with) a respective group of contact pads to form an electronic circuit,

providing a heated surface and an opposing surface together having a gap therebetween,

transferring the flexible first structure, comprising the electronic circuits, between the heated surface and the opposing surface such that the adhesive is cured by application of heat and pressure from the heated surface and the opposing surface thereby adhering the IC onto the respective first portion.

Claims

1. A method of manufacturing a plurality of electronic circuits, each electronic circuit comprising a respective flexible first portion, comprising a respective group of contact pads, and a respective flexible integrated circuit (IC) comprising a respective group of terminals and mounted on the respective group of contact pads with each terminal in electrical contact with a respective contact pad, the method comprising: providing a flexible first structure comprising the plurality of first portions; providing a second structure comprising the plurality of flexible ICs and a common support arranged to support the plurality of flexible ICs; dispensing an adhesive onto the first structure and/or onto the flexible ICs; transferring said flexible ICs from the common support onto the flexible first structure such that each group of terminals is mounted on a respective group of contact pads to form an electronic circuit, providing a heated surface and an opposing surface together having a gap therebetween, transferring the flexible first structure, comprising the electronic circuits, between the heated surface and the opposing surface such that the adhesive is cured by application of heat and pressure from the heated surface and the opposing surface thereby adhering the IC onto the respective first portion, wherein a silicone paper layer is located between the electronic circuits and the heated surface to protect the heated surface form fouling with excess adhesive.

2. The method according to claim 1, wherein the first structure is a flexible web.

3. The method according to claim 1, wherein the flexible ICs comprise a flexible plastic base material.

4. The method according to claim 1, wherein the adhesive is applied as a laminate layer to the first structure and/or to the flexible ICs held on the common support.

5. The method according to claim 1, wherein the adhesive is applied to a predefined area of the first structure, the predefined area comprising at least the area of the first structure comprising the respective group of contact pads of each of the plurality of first portions.

6. The method according to claim 1, wherein the adhesive is applied to a predefined area of the first structure, the predefined area of the first structure comprising the area around the contact pads and excluding the contact pads.

7. The method according to claim 1, wherein the adhesive is applied to a predefined area of the IC.

8. The method according to claim 7, wherein the predefined area comprises at least the area of the IC comprising the respective group of terminals of each of the plurality of ICs, or wherein the predefined area of the IC comprises the base layer of the IC and excludes the terminals of the IC.

9. (canceled)

10. The method according to claim 1, wherein the adhesive forms raised bond pads on the, or each flexible IC, wherein each bond pad may have a depth between 0.5 m and 10 m.

11-16. (canceled)

17. The method according to claim 1, wherein a non-conductive adhesive is flowed under heat and pressure applied by the heated surface and opposing surface, wherein the non-conductive adhesive is flowed away from the contact pads of the, or each, first portion by application of heat and pressure from the heated surface and opposing surface such that the adhesive adheres the IC and the first portion together and the terminals of the IC and the contact pads of the first portion are electrically connected and free of non-conductive adhesive.

18. (canceled)

19. The method according to claim 17, wherein the non-conductive adhesive is flowed away from the terminals of the, or each, IC by application of heat and pressure from the heated surface and opposing surface such that the adhesive adheres the IC and the first portion together and the terminals of the IC and the contact pads of the first portion are electrically connected and free of non-conductive adhesive.

20. The method according to claim 1, wherein the flexible first structure is continuously transferred between the heated surface and the opposing surface.

21-27. (canceled)

28. The method according to claim 1, wherein the adhesive is applied to the first structure and/or to the flexible ICs by screen printing, deposition, electro-plating, by jet dispensing or time pressure dispensing.

29-31. (canceled)

32. An apparatus for bonding a plurality of flexible electronic components (ICs) each comprising a group of terminals to a plurality of respective first portions each comprising a group of contact pads to form a plurality of electronic circuits utilising a curable adhesive, the apparatus comprising: a heated surface and an opposing surface together providing a gap for receiving a flexible first structure comprising a plurality of first portions; a first support structure configured to support a flexible first structure comprising the plurality of first portions and controllable to translate said a flexible first structure relative to the heated surface and opposing surface and into the gap therebetween; a second support structure configured to support a second structure, comprising the plurality of flexible electronic components; an adhesive 1 dispenser configured to dispense curable adhesive onto the flexible first portion and/or onto the plurality of flexible electronic components; a heating configured to heat the heated surface and to cure the curable adhesive, a transfer mechanism to transfer the flexible electronic components from the second structure onto a respective first portion such that each group of terminals is mounted on a respective group of contact pads, drive assembly controllable to drive the first support means to translate the flexible first structure relative to said heated surface and opposing surface; a control system arranged to control the drive assembly and first and second support structure to transfer said flexible electronic components (ICs) from the second structure onto the flexible first structure such that each group of terminals is mounted on a respective group of contact pads; and a silicone paper layer is located between the electronic circuits and the heated surface to protect the heated surface from the fouling with excess adhesive.

33. The apparatus according to claim 32, wherein the flexible first portion comprises a flexible web circuit.

34. The apparatus according to claim 33, wherein the flexible web circuit comprises a plurality of first portions.

35-49. (canceled)

50. The apparatus according to claim 32, further comprising a silicone paper layer between the flexible first structure and the heated surface.

51. The apparatus according to claim 50, wherein the silicone paper layer is located between the flexible electronic components and the heated surface.

52. The apparatus according to claim 32, wherein the adhesive dispensing means comprises a screen printer, a jet nozzle dispenser or a time pressure dispenser.

53. An apparatus for manufacturing a plurality of electronic circuits, each electronic circuit comprising a respective first portion, comprising a respective group of contact pads, and a respective integrated circuit, IC, comprising a respective group of terminals and mounted on the respective group of contact pads with each terminal in electrical contact with a respective contact pad, the apparatus comprising: a pair of nip rollers, at least one of the rollers of the pair of nip rollers comprising a heated surface, each of said rollers in the pair of nip rollers being arranged to rotate about a rotational axis, a first support structure configured to support a flexible first structure comprising the plurality of first portions and controllable to translate said first flexible structure relative to said rotational axes; a second support structure configured to support a second structure, comprising the plurality of flexible ICs; an adhesive dispensing nozzle configured to dispense curable adhesive onto the plurality of first portions flexible first structure; a heating element configured to heat the surface of the at least one of the rollers of the pair of nip rollers and to cure the curable adhesive, a transfer mechanism to transfer the flexible ICs from the second structure onto the flexible first structure such that each group of terminals is mounted on a respective group of contact pads, drive assembly controllable to drive the first support structure to translate the flexible first structure relative to said respective rotational axes; a control system arranged to control the drive assembly, the nip rollers and first and second support structure to transfer said ICs from the second structure onto the flexible first structure such that each group of terminals is mounted on a respective group of contact pads; and a silicone paper layer is located between the electronic circuits and the heated surface to protect the heated surface from fouling with excess adhesive.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Embodiments of the invention are further described hereinafter with reference to the accompanying drawings, in which:

[0082] FIG. 1a is a schematic representation of an apparatus for bonding a plurality of flexible electronic components (ICs) to a plurality of respective first portions according to an embodiment of the invention;

[0083] FIG. 1b is a schematic representation of an according to FIG. 1a further comprising a silicone paper layer to prevent excess adhesive fouling the rollers;

[0084] FIG. 2 is a schematic representation of an apparatus for bonding a plurality of flexible electronic components (ICs) to a plurality of respective first portions according to a further embodiment of the invention;

[0085] FIG. 3a-FIG. 3c are schematic representations of adhesive applied to areas of a first portion;

[0086] FIG. 4 is a schematic representation of an apparatus for bonding a plurality of flexible electronic components (ICs) to a plurality of respective first portions according to a further embodiment of the invention;

[0087] FIG. 5 shows an electronic circuit manufactured in accordance with an embodiment of the method according to the invention comprising an IC adhered to a first portion by a layer of non-conductive adhesive; and

[0088] FIG. 6 is a schematic representation of adhesive applied to discrete areas of an IC.

DETAILED DESCRIPTION

[0089] Like numerals are used to denote similar features throughout the figures.

[0090] Referring to FIG. 1a, an apparatus 1 for bonding a plurality of flexible electronic components (ICs) 3 to a plurality of respective first portions 5 to form a plurality of electronic circuits 7 utilising a curable adhesive 9 is shown.

[0091] The integrated circuits 3 are initially provided on a common support 11. Adhesive 9 is dispensed from a nozzle 13 onto a first portion 5 formed on first structure 15 in the form of a flexible web of polyethylene terephthalate (PET). Each first portion 5 comprises contact pads (not shown), upwardly facing from the surface of the flexible web 15, and electrically contact to the electronic circuit printed on web 15.

[0092] The flexible web 15 is translated in the direction A by drive means (not shown) towards of a pair of nip rollers 17a and 17b. The pair of nip rollers 17a and 17b have a gap 19 therebetween through which the flexible web 15, comprising a plurality of IC/adhesive/first portion assemblies 20 is continuously translated. The adhesive in assembly 20 is uncured. Each nip roller 17a, 17b comprises a core 21a, 21b and an outer surface 23a, 23b. The core 21a, 21b of each roller is heated by a heating element 25a, 25b which in turn heats the surface 23a, 23b of the roller.

[0093] The heated surface 23a and the opposing heated surface 23b together providing a gap 19 for receiving the IC/adhesive/first portion assembly 20 on flexible web 15. The roller 27 is arranged to support the flexible web 15 comprising the plurality of first portions 5 and is controllable to translate the a flexible web 15 (i.e. when supported by the first support means) relative to the heated surface 23a and opposing surface 23b and into the gap 19 therebetween.

[0094] Roller 29 is arranged to support common support 11 comprising the plurality of flexible electronic components (ICs) 3. Roller 29 is driven by a drive means (not shown) such as a motor or the like and is operable to move the common support 11 in direction B.

[0095] Nozzle 13 is operable to dispense curable adhesive onto the flexible web 15 and onto each first portion 5.

[0096] A pick and place device (or a transfer roller) (not shown) is used to transfer the flexible electronic components 3 from the common support 11 onto a respective first portion 5 such that each group of terminals of the flexible electronic components 3 is mounted on (brought into electrical contact with) a respective group of contact pads on each first portion 5.

[0097] The heating elements 25a and 25b are operable to heat the heated surface 23a of roller 17a and the heated surface 23b of roller 17b respectively and to cure the curable adhesive in each assembly 20 to produce an electronic circuit 7 in which the adhesive is cured and the IC 3 and the first portion 5 are adhered to one another.

[0098] A roller driver 31 comprising a drive motor is controllable to drive roller 27 to translate the flexible web 15 relative to said heated surface 23a and opposing surface, heated surface 23b.

[0099] A control unit 33 is arranged to control the roller driver 31 and first and second support means (rollers 27, 29) to transfer said ICs from the common support 11 onto the flexible web 15 such that each group of terminals is mounted on (brought into electrical contact with) a respective group of contact pads.

[0100] The control unit 33 is arranged to control the distance between the rotational axes of the pair of nip rollers 17a and 17b. In this way, the gap 19 between the adjacent surfaces 23a, 23b of the rollers at their narrowest point is controlled by the control unit 33.

[0101] The apparatus of FIG. 1b is identical to the apparatus 1 of FIG. 1a except for the provision of a further silicone paper layer 26 positioned between the assembly 20 and the roller 17a. This silicone paper 26 can be indexed by operation of drive rollers 24a, 24b as necessary to provide a fresh silicone paper layer once it is excessively soiled with adhesive 9. In FIG. 1b, the gap 19 between the rollers 17a and 17b is exaggerated in size for clarity. The rollers 17a, 17b come together to provide gap 19 and contact between the roller 17a, silicone paper layer 26, assembly 20 and roller 17b.

[0102] As best seen in FIG. 4, in embodiments of the apparatus there are two pairs of nip rollers 17a, 17b and 117a, 117b respectively. Respective heating elements 25a, 25b, 125a, 125b are arranged (adapted, configured) to heat the surfaces 23a, 23b, 123a, 123b of each of the rollers 17a, 17b, 117a, 117b of each pair of nip rollers.

[0103] The flexible web 15 comprising assemblies of IC (3)/adhesive (9)/first portion (5) is advanced continuously in direction A, and the first pair of nip rollers 17a/17b applies heat and pressure to the assembly in order to cure adhesive 9 to form electronic circuit 7. The circuit 7 on flexible web 15 continues to a second pair of nip rollers 117a/117b where heated surfaces 123a, 123b apply heat and pressure to the electronic circuit 7 to strengthen the adhesive bond between the IC 3 and the first portion 5.

[0104] In the alternative embodiment depicted in FIG. 2, the apparatus 101 is similar to apparatus 1 of FIG. 1 with the exception that the heated surface and the opposing surface of the invention are provided by roller 17a and planar surface 117. In the depicted embodiment, flexible web 15 is passed through the gap 19 between the heated roller 17a and the planar surface 117. The heat from the surface 23a of heated roller 17a and the nip pressure between roller 17a and surface 117 cure the adhesive 9 in assembly 20.

[0105] Each assembly 20 is formed of an IC 3, adhesive 9 and a first portion 5. In the assembly 20, the adhesive is uncured and the assembly 20 is ready to be passed through the gap 19 between the heated surface and the opposing surface in order to cure the adhesive and form electronic circuit 7. As best seen in FIG. 5, each assembly comprises an integrated circuit 3 having a plurality of terminals 37. A layer of adhesive 9 is applied to the first portion 5 in the area between the contact pads 35 of the first portion 5. The terminals 37 contact a respective terminal 37 in order to form an electrical contact between the IC 3 and the first portion 5. As can be seen in either FIG. 1 or FIG. 2, passing assembly 20 through the nip rollers 17a, 17b or through the gap 19 between roller 17a and surface 117 applies heat and pressure to the assembly, thereby curing the adhesive 9 and forming electronic circuit 7.

[0106] FIGS. 3a, 3b and 3c depict alternative patterns for dispensing adhesive 9 onto a first portion 5. In FIG. 3a, a conductive adhesive is dispensed only onto the contact pads 35. When the first portion contact pads 35 are brought into contact with respective terminals of an IC (not shown), the conductive adhesive 9 between the contact pads 35 and the terminals can be cured to form an electrical and mechanical attachment between the first portion 5 and the IC.

[0107] In FIG. 3b, a non-conductive adhesive is applied to the areas around the contact pads 35. The application of the adhesive in this embodiment can be to the whole first portion 5 and the application of heat and pressure to the first portion/adhesive/IC assembly will cause the non-conductive adhesive 9 to flow away from the contact pads 35 into the areas shown in FIG. 3b.

[0108] The adhesive 9 of FIG. 3c is applied as a laminate layer to the first portion 5.

[0109] FIG. 6 depicts an exemplary adhesive pattern applied to an IC 3. The adhesive 9 is applied by a nozzle in discrete patches on the base layer of an IC 3 around the terminals 37.

[0110] It should be understood that the adhesive application patterns of FIGS. 3a, 3b and 3c could be those applied to an IC and that the adhesive application pattern of FIG. 6 could be applied to a first portion.

[0111] Throughout the description and claims of this specification, the words comprise and contain and variations of them mean including but not limited to, and they are not intended to (and do not) exclude other moieties, additives, components, integers or steps. Throughout the description and claims of this specification, the singular encompasses the plural unless the context otherwise requires. In particular, where the indefinite article is used, the specification is to be understood as contemplating plurality as well as singularity, unless the context requires otherwise.

[0112] Features, integers, characteristics, compounds, chemical moieties or groups described in conjunction with a particular aspect, embodiment or example of the invention are to be understood to be applicable to any other aspect, embodiment or example described herein unless incompatible therewith. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive. The invention is not restricted to the details of any foregoing embodiments. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.

[0113] The reader's attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.

[0114] Below, there is provided a non-exhaustive list of non-limiting clauses. Any one or more of the features of these examples may be combined with any one or more features of another clause, embodiment or aspect described herein.

[0115] Aspects: [0116] 1. A method of manufacturing a plurality of electronic circuits, each electronic circuit comprising a respective flexible first portion, comprising a respective group of contact pads (contacts), and a respective flexible integrated circuit, IC, [0117] comprising a respective group of terminals and mounted on the respective group of contact pads with each terminal in electrical contact with a respective contact pad, the method comprising: [0118] providing (e.g. manufacturing) a flexible first structure comprising the plurality of first portions; [0119] providing (e.g. manufacturing) a second structure comprising the plurality of flexible ICs and a common support arranged to support the plurality of flexible ICs; [0120] dispensing an adhesive onto the first structure and/or onto the flexible ICs; [0121] transferring said flexible ICs from the common support onto the flexible first structure such that each group of terminals is mounted on (brought into electrical contact with) a respective group of contact pads to form an electronic circuit, [0122] providing a heated surface and an opposing surface together having a gap therebetween, [0123] transferring the flexible first structure, comprising the electronic circuits, between the heated surface and the opposing surface such that the adhesive is cured by application of heat and pressure from the heated surface and the opposing surface thereby adhering the IC onto the respective first portion. [0124] 2. A method according to aspect 1, wherein the first structure is a flexible web. [0125] 3. A method according to aspect 1 or aspect 2, wherein the flexible ICs comprise a flexible plastic base material. [0126] 4. A method according to any one of aspects 1 to 3, wherein the adhesive is applied as a laminate layer to the first structure and/or to the flexible ICs held on the common support. [0127] 5. A method according to any one of the preceding aspects, wherein the adhesive is applied to a predefined area of the first structure, the predefined area comprising at least the area of the first structure comprising the respective group of contact pads (contacts) of each of the plurality of first portions. [0128] 6. A method according to any one of aspects 1 to 5, wherein the adhesive is applied to a predefined area of the first structure, the predefined area of the first structure comprising the area around the contact pads and excluding the contact pads. [0129] 7. A method according to any one of the preceding aspects, wherein the adhesive is applied to a predefined area of the IC. [0130] 8. A method according to aspect 7, wherein the predefined area comprises at least the area of the IC comprising the respective group of terminals of each of the plurality of ICs. [0131] 9. A method according to aspect 7, wherein the predefined area of the IC comprises the base layer of the IC and excludes the terminals of the IC. [0132] 10. A method according to any one of the preceding aspects, wherein the adhesive forms raised bond pads on the, or each flexible IC. [0133] 11. A method according to aspect 10, wherein each bond pad may have a depth of between 0.5 m and 10 m. [0134] 12. A method according to any one of the preceding aspects, wherein the adhesive is dispensed onto discrete areas including each of the first portions of the first structure and/or each of the flexible ICs on the common support. [0135] 13. A method according to aspects 12, wherein the adhesive is dispensed onto discrete areas in a controlled amount. [0136] 14. A method according to any one of the preceding aspects, wherein the adhesive is conductive, pressure sensitive, non-conductive, isotropic and/or anisotropic. [0137] 15. A method according to aspect 14, wherein the adhesive is conductive. [0138] 16. A method according to aspect 14, wherein the adhesive is non-conductive. [0139] 17. A method according to aspect 14, wherein the non-conductive adhesive is flowed under heat and pressure applied by the heated surface and opposing surface. [0140] 18. A method according to aspect 17, wherein the non-conductive adhesive is flowed away from the contact pads of the, or each, first portion by application of heat and pressure from the heated surface and opposing surface such that the adhesive adheres the IC and the first portion together and the terminals of the IC and the contact pads of the first portion are electrically connected and free of non-conductive adhesive. [0141] 19. A method according to aspect 17 or aspect 18, wherein the non-conductive adhesive is flowed away from the terminals of the, or each, IC by application of heat and pressure from the heated surface and opposing surface such that the adhesive adheres the IC and the first portion together and the terminals of the IC and the contact pads of the first portion are electrically connected and free of non-conductive adhesive. [0142] 20. A method according to any one of the preceding aspects, wherein the flexible first structure is continuously transferred between the heated surface and the opposing surface. [0143] 21. A method according to any one of the preceding aspects, wherein the heated surface and the opposing surface are provided by a pair of nip rollers. [0144] 22. A method according to aspect 21, wherein each roller in the pair of nip rollers comprises a heated roller surface. [0145] 23. A method according to aspect 21 or aspect 22, wherein the, or each, roller of the pair of nip rollers comprises a heated core. [0146] 24. A method according to any one of aspects 21 to 23, wherein the, or each, roller of the pair of nip rollers comprises a surface layer wrapped around a core. [0147] 25. A method according to aspect 24, wherein the surface layer is heated. [0148] 26. A method according to any one of the preceding aspects, wherein a silicone paper layer is located between the electronic circuits and the heated surface to protect the heated surface from fouling with excess adhesive. [0149] 27. A method according to any one of aspects 21 to 26, wherein the first structure is transferred between a plurality of pairs of nip rollers in succession. [0150] 28. A method according to any one of the preceding aspects, wherein the adhesive is applied to the first structure and/or to the flexible ICs by screen printing, deposition, electro-plating, by jet dispensing or time pressure dispensing. [0151] 29. A method according to any one of the preceding aspects, wherein the cured adhesive is treated to improve the bond between the IC and the respective first portion. [0152] 30. A method according to any one of the preceding aspects, wherein each first portion comprises an electronic circuit in electrical contact with the group of contact pads. [0153] 31. An apparatus arranged to implement a method in accordance with any one of the preceding aspects. [0154] 32. An apparatus for bonding a plurality of flexible electronic components (ICs) each comprising a group of terminals to a plurality of respective first portions each comprising a group of contact pads to form a plurality of electronic circuits utilising a curable adhesive, the apparatus comprising: [0155] a heated surface and an opposing surface together providing a gap for receiving a flexible first structure comprising a plurality of first portions; [0156] a first support means (roller, structure, assembly, mechanism) arranged (adapted, configured) to support a flexible first structure comprising the plurality of first portions and controllable to translate said a flexible first structure (i.e. when supported by the first support means) relative to the heated surface and opposing surface and into the gap therebetween; [0157] a second support means (structure, assembly, mechanism) arranged (adapted, configured) to support a second structure, comprising the plurality of flexible electronic components; [0158] an adhesive dispensing means (nozzle, printer, manifold) arranged (adapted, configured) to dispense curable adhesive onto the flexible first portion and/or onto the plurality of flexible electronic components; [0159] a heating means (heating element) arranged (adapted, configured) to heat the heated surface and to cure the curable adhesive, [0160] a transfer means (roller, mechanism) to transfer the flexible electronic components from the second structure onto a respective first portion such that each group of terminals is mounted on (brought into electrical contact with) a respective group of contact pads, [0161] drive means (roller driving structure, assembly, system, mechanism, or at least one roller driver, for example comprising at least one drive motor) controllable to drive the first support means to translate the flexible first structure relative to said heated surface and opposing surface; [0162] control means (e.g. a control system, or at least one controller, control unit, or control module) arranged to control the drive means and first and second support means to transfer said flexible electronic components (ICs) from the second structure onto the flexible first structure such that each group of terminals is mounted on (brought into electrical contact with) a respective group of contact pads. [0163] 33. An apparatus according to aspect 32, wherein the flexible first portion comprises a flexible web circuit. [0164] 34. An apparatus according to aspect 33, wherein the flexible web circuit comprises a plurality of first portions. [0165] 35. An apparatus according to any one of aspects 32 to 34, wherein the heated surface and the opposing surface are provided by a pair of nip rollers, at least one of the rollers of the pair of nip rollers comprising a heated surface. [0166] 36. An apparatus according to aspect 35, wherein each of said rollers in the pair of nip rollers is arranged to rotate about a rotational axis. [0167] 37. An apparatus according to any one of aspects 32 to 36, wherein the first support means (roller, structure, assembly, mechanism) is arranged (adapted, configured) to support the flexible web circuit comprising the plurality of first portions and is controllable to translate said a flexible web circuit (i.e. when supported by the first support means) relative to said rotational axes. [0168] 38. An apparatus according to any one of aspects 32 to 37, wherein the second support means (structure, assembly, mechanism) is arranged (adapted, configured) to support the second structure comprising the plurality of flexible electronic components. [0169] 39. An apparatus according to any one of aspects 35 to 38, wherein the heating means (heating element) is arranged (adapted, configured) to heat the surface of the at least one of the rollers of the pair of nip rollers and to cure the curable adhesive. [0170] 40. An apparatus according to any one of aspects 32 to 39, wherein the drive means (roller driving structure, assembly, system, mechanism, or at least one roller driver, for example comprising at least one drive motor) is controllable to drive the first support means to translate the flexible web circuit relative to said respective rotational axes. [0171] 41. An apparatus according to any one of aspects 35 to 40, wherein the control means (e.g. a control system, or at least one controller, control unit, or control module) is arranged to control the drive means, the nip rollers and first and second support means to transfer said ICs from the second structure onto the flexible web circuit such that each group of terminals is mounted on (brought into electrical contact with) a respective group of contact pads. [0172] 42. An apparatus according to any one of aspects 35 to 41, wherein the control means is arranged to control the distance between the rotational axes of the pair of nip rollers. [0173] 43. An apparatus according to any one of aspects 35 to 41, wherein the apparatus comprises two or more pairs of nip rollers. [0174] 44. An apparatus according to aspect 43, wherein a heating means (heating element) is arranged (adapted, configured) to heat the surface of at least one of the rollers of each pair of nip rollers. [0175] 45. An apparatus according to aspect 43 or aspect 44, wherein the control means is arranged to control the distance between the rotational axes of each pair of nip rollers. [0176] 46. An apparatus according to any one of aspects 35 to 45, wherein the, or each roller of the, or each pair of nip rollers comprises a heated core. [0177] 47. An apparatus according to aspect 46, wherein the heated core comprises a heating element. [0178] 48. An apparatus according to any one of aspects 35 to 47, wherein, the, or each, roller of the pair of nip rollers comprises a surface layer wrapped around a core. [0179] 49. An apparatus according to aspect 48, wherein the surface layer is heated. [0180] 50. An apparatus according to any one of aspects 32 to 49, further comprising a silicone paper layer between the flexible first structure and the heated surface (e.g. the roller). [0181] 51. An apparatus according to aspect 50, wherein the silicone paper layer is located between the flexible electronic components and the heated surface. [0182] 52. An apparatus according to any one of aspects 32 to 51, wherein the adhesive dispensing means comprises a screen printer, a jet nozzle dispenser or a time pressure dispenser. [0183] 53. An apparatus for manufacturing a plurality of electronic circuits, each electronic circuit comprising a respective first portion, comprising a respective group of contact pads (contacts), and a respective integrated circuit, IC, comprising a respective group of terminals and mounted on the respective group of contact pads with each terminal in electrical contact with a respective contact pad, the apparatus comprising: [0184] a pair of nip rollers, at least one of the rollers of the pair of nip rollers comprising a heated surface, [0185] each of said rollers in the pair of nip rollers being arranged to rotate about a rotational axis, [0186] a first support means (roller, structure, assembly, mechanism) arranged (adapted, configured) to support a flexible first structure comprising the plurality of first portions and controllable to translate said first flexible structure (i.e. when supported by the first support means) relative to said rotational axes; [0187] a second support means (structure, assembly, mechanism) arranged (adapted, configured) to support a second structure, comprising the plurality of flexible ICs; [0188] an adhesive dispensing means (nozzle, printer) arranged (adapted, configured) to dispense curable adhesive onto the plurality of first portions flexible first structure; [0189] a heating means (heating element) arranged (adapted, configured) to heat the surface of the at least one of the rollers of the pair of nip rollers and to cure the curable adhesive, [0190] a transfer means (roller, mechanism) to transfer the flexible ICs from the second structure onto the flexible first structure such that each group of terminals is mounted on (brought into electrical contact with) a respective group of contact pads, [0191] drive means (roller driving structure, assembly, system, mechanism, or at least one roller driver, for example comprising at least one drive motor) controllable to drive the first support means to translate the flexible first structure relative to said respective rotational axes; [0192] control means (e.g. a control system, or at least one controller, control unit, or control module) arranged to control the drive means, the nip rollers and first and second support means to transfer said ICs from the second structure onto the flexible first structure such that each group of terminals is mounted on (brought into electrical contact with) a respective group of contact pads.