WO2002056377A2 - Procede de raccordement electrique module d'affichage et carte a puce obtenue selon ce procede. - Google Patents
Procede de raccordement electrique module d'affichage et carte a puce obtenue selon ce procede. Download PDFInfo
- Publication number
- WO2002056377A2 WO2002056377A2 PCT/FR2002/000040 FR0200040W WO02056377A2 WO 2002056377 A2 WO2002056377 A2 WO 2002056377A2 FR 0200040 W FR0200040 W FR 0200040W WO 02056377 A2 WO02056377 A2 WO 02056377A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- connection
- display module
- tracks
- card
- base plate
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 60
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- 229910052782 aluminium Inorganic materials 0.000 claims description 27
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49855—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers for flat-cards, e.g. credit cards
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/538—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates
- H01L23/5388—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates for flat cards, e.g. credit cards
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/42—Arrangements for providing conduction through an insulating substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the present invention relates to a method of electrical connection.
- the present invention relates more particularly to a method of electrical connection of the connection tracks of a display module, of the flat screen type, to connection pads, the display module being in particular intended to be mounted in an electronic device.
- the display module comprising a base plate of insulating material which carries, superimposed above its upper face, connection tracks and an electro-optical device d display which is electrically connected to the connection tracks.
- display modules for electronic devices use a liquid crystal display screen which is interposed between two glass slides.
- Such a type of display module is shown in Figure 1.
- the liquid crystal display module 10 is produced by means of two superimposed glass slides 12, 14 between which is arranged an electro-optical device 16 of the liquid crystal type.
- the upper plate 12, or display window is transparent so as to form a display screen oriented here upwards.
- the lower blade 14, or base plate carries on its upper face tracks 18 of electrical connection which are connected to the electro-optical device 16.
- FIG. 2 A possible variant is shown in which the connection tracks 18 are worn by the lower face of the display window 12.
- connection tracks 18 form connection pads 20 in a lateral zone of the base plate 14, respectively of the display window 12, which is not covered by the display window 12, respectively by the base plate 14.
- connection pads 20 are always arranged either on the upper face of the base plate 14 or on the lower face of the display window 12, that is to say generally between the two blades 12, 14.
- connection pads 20 make it possible to electrically connect the connection tracks 18 to an electronic control unit which controls the electro-optical device 16 so that the screen displays the desired image.
- the glass slides 12, 14 have the advantage of translucency and dimensional stability, but their disadvantages are too great a thickness and an absence of flexibility making the display module 10 fragile and not suitable for installation in thin objects and in common use such as smart cards.
- glass slides 12, 14 makes it difficult to integrate electronic functions into the thickness of the display module 10, for example the integration of control microcircuits.
- display modules 10 have been proposed using blades 12, 14 made of plastic, replacing glass, and allowing the integration of microcircuits into the thickness of module 10.
- WO-A-00/55916 describes for example a display module in which the electro-optical device 30 is arranged between two blades 26, 28, or plates, of small thickness of plastic material which comprise microcircuits for controlling the display, or "nanoblocks" 32.
- This type of display module 10 is shown diagrammatically in FIG. 4.
- the “nanoblocks” 32 are arranged in cavities made in the upper face of the base plate 28.
- a thin layer of aluminum 34 is then deposited by evaporation on the upper face of the base plate 28, over the “nanoblocks” 32, then this layer of aluminum 34 is etched, according to a photolithography process, or “etching In order to produce the connection tracks 33 of the display module 10 and a lower electrode 35 for controlling the display.
- the lower electrode 35 is formed from a matrix of pixels or aluminum bars which are electrically connected to the “nanoblocks” 32.
- the display module 10 also includes an upper electrode 37 which is carried by the lower face of the upper plate 26, or transparent protection plate.
- the upper electrode 37 consists of a transparent titanium oxide grid which is connected to ground, at the level of the connection tracks 33, and which covers an area greater than or equal to the total area of the lower electrode.
- An electro-optical layer 30 is arranged between the two electrodes.
- the electro-optical layer 30 includes elements sensitive to an electric field created between the electrodes 35, 37. These sensitive elements are liable to change their appearance when subjected to an appropriate electrical signal from the electrodes 35, 37 , so as to allow the display of a visible image, here from above the display module, through the transparent protection plate 26 and through the upper electrode 37.
- the electro-optical layer 30 comprises for example liquid crystals or an electrophoretic device.
- Each “nanoblock” 32 controls a part of the lower electrode 35, for example an area of the lower electrode 35 which allows the display of a character such as a letter or a number.
- connection pads 36 are formed in a lateral zone of the upper face of the base plate 28 which is not covered by the upper plate 26.
- connection pads 36 extending towards the outside of the display module 10, they must not be brought into contact with the oxygen in the air, at the risk of being oxidized.
- connection pads 36 The oxidation of the connection pads 36 causes the creation of an alumina layer, which is a non-conductive compound, which makes it difficult to interconnect the connection pads 36 with an electrical network external to the display module 10, for example with the output pads of a main microcircuit, or chip, of a smart card. To interconnect the connection pads
- connection pads 36 with an external electrical network, it is then necessary to exert a relatively large force on the pads 36, so as to pierce the alumina layer.
- the thickness of the aluminum layer 34 forming the connection pads 36 is very thin, for example of the order of
- connection tracks 33 and / or the connection pads 36 are 0.5 ⁇ m, and therefore very fragile. By piercing the alumina layer, there is therefore a risk of damaging the connection tracks 33 and / or the connection pads 36.
- connection pads 36 are carried by the base plate 28, which is made of plastic, that is to say in a flexible material which does not have a high mechanical resistance.
- the base plate 28 therefore does not offer a rigid bearing surface to allow the interconnections.
- a conductive protective layer can be deposited, but this increases the manufacturing cost.
- connection of the thin layer of aluminum 34, forming each connection pad 36, to another conductive element, such as an output pad of a microcircuit, is difficult to achieve industrially by a conventional process.
- the invention proposes an electrical connection method of the type described above, characterized in that it comprises the following steps: • the arrangement of the connection pads under the base plate;
- connection tracks • making electrical connections between the connection tracks and the connection pads, through connection wells.
- connection pads which facilitate the interconnection of the display module with other electronic devices, in particular inside a smart card.
- the invention simplifies the assembly of a display module in a smart card and reduces the production costs of the card.
- the invention allows the display module and several electronic devices to be integrated in the same module, or combined module, with their connections, such as a microcircuit, an antenna, contact tracks, etc. According to other characteristics of the invention:
- the studs are made directly on the underside of the base plate
- the pads are produced by depositing and etching a layer of conductive material on the underside of the base plate;
- the studs are made before the wells are made, and the wells open opposite the studs;
- At least one antenna element is made flat on the underside of the base plate
- the pads belong to contact tracks, in particular the contact tracks of a smart card, which are electrically connected to at least one main microcircuit, so as to form an interface to allow a electronic communication of the main microcircuit of the card with an external electronic device, or card reader, comprising a complementary interface;
- the pads belong to flat antenna elements, in particular antenna elements of a smart card, which are electrically connected to at least one main microcircuit, so as to allow contactless electronic communication of the main microcircuit the card with an external electronic device, or card reader, comprising an additional transmitter / receiver;
- the studs are made on the upper face of a secondary plate which is fixed against the lower face of the base plate;
- connection tracks and the electrical connections are made simultaneously through the connection wells by depositing and etching a layer of conductive connection material on the upper face of the base plate, after the perforation step;
- the conductive connecting material is a metal, in particular aluminum, which is deposited by evaporation;
- each microcircuit is electrically connected with the connection tracks, and the connection tracks with the pads, during the same step;
- connection wells and each cavity are produced during the same step, in particular by removing material or by moving material.
- the invention also provides a display module characterized in that it comprises connection pads which are electrically connected to its connection tracks by a method according to any one of the preceding characteristics.
- the invention also proposes a smart card characterized in that it comprises at least one display module according to the preceding characteristic.
- the display module when it has a support plate, or card body, of which a lower face has contact tracks, the display module is arranged in the support plate so that the display is oriented towards the side of the upper face of the support plate; - The contact tracks of the card support plate are arranged on the back of the display module;
- the display module is part of an element added in the card which comprises in superposed layers respectively from bottom to top: • a secondary plate carrying on its underside contact tracks and / or at least one antenna element and carrying in its upper face at least one main microcircuit which controls the display module and which is electrically connected to the contact tracks and / or to the antenna element; • the display module, the connection tracks of which are electrically connected to the output pads of the main microcircuit.
- FIGS. 1 and 2 are views in longitudinal section which schematically represent two variants of a display module according to the prior art comprising glass slides;
- - Figure 3 is a view similar to the previous which schematically shows a display module of the "chip on glass” type according to the prior art
- - Figure 4 is a view similar to the previous which schematically shows a flexible display module produced by the "Fluidic Self Assembly”process
- - Figure 13 is a bottom view which schematically shows the display module of Figure 12;
- - Figure 14 is a perspective view which schematically shows a first embodiment of a smart card comprising a display module produced in accordance with the teachings of the invention;
- FIG. 15 is a longitudinal sectional view along the sectional plane of stage 15-15 which schematically represents the smart card of Figure 14;
- FIG. 16 is a perspective view which schematically shows a second embodiment of a smart card comprising a display module produced in accordance with the teachings of the invention.
- FIG. 17 is a longitudinal sectional view which schematically shows the arrangement of the display module in the contact chip card of Figure 16;
- FIG. 18 is a view similar to the previous one which schematically represents a variant of the second embodiment in which the chip card with display operates without contact;
- FIG. 19 is a view similar to the previous one which schematically shows a variant of the second embodiment in which the smart card with display operates with contacts and without contact;
- FIG. 20 is a view similar to the previous one which schematically represents a third embodiment a smart card comprising a display module produced in accordance with the teachings of the invention
- FIG. 21 is a view similar to the previous one which schematically represents a variant of the third embodiment of a smart card.
- FIGS. 5 to 13 The preferred embodiment of the electrical connection method according to the invention is illustrated diagrammatically in FIGS. 5 to 13.
- Figures 12 and 13 show a complete display module 10 comprising pads 38 which are electrically connected in accordance with the teachings of the method according to the invention.
- the first phase P1 of the method according to the invention consists in producing connection pads 38 on the back of a base plate 40 made of insulating material, that is to say on its underside 42.
- connection pads 38 are produced by a known method such as that which is used to produce the contact tracks of a smart card.
- This first phase P1 of the method comprises a first step E1 p ⁇ , which is illustrated by FIG. 5, during which a layer of conductive material is deposited, here a layer of copper 44,. on the underside 42 of the base plate 40 of insulating material.
- the insulating material is for example a plastic material such as polyethylene or polyamide.
- the copper layer 44 has a thickness of less than 5 ⁇ m after it has been deposited.
- connection pads 38 are formed on the copper layer 44 by removing material, so as to form connection pads 38.
- connection pads 38 have for example the shape of generally rectangular blocks which are separated from each other by corridors 46, or grooves.
- the thickness of the copper layer 44 is increased, for example by immersing the base plate 40 in an electrolytic bath containing copper.
- This third step E3 P ⁇ makes it possible to obtain a layer of copper 44 whose final thickness is for example greater than or equal to 15 ⁇ m.
- the copper layer 44 is covered with a "gold flash" (not shown) forming a very thin protective layer which makes it possible to avoid the oxidation of the copper layer 44.
- the lower face 42 of the base plate 40 comprises for example a GND pad for the electrical connection of the display module 10 to ground, an I / O pad for electrical connection of the display module 10 for the input and the data output, " a CLK pad for electrical connection of the display module 10 to a clock, and a VCC pad for connection to the electrical supply of the display module 10.
- a second phase P2 of the method is then implemented during which is arranged on the upper face 48 of the base plate 40 of the display control microcircuits, or "nanoblocks" 50.
- the “nanoblocks” 50 are microcircuits which are carried by the upper face of a base, here in the form of a section of inverted pyramid with four sides.
- these “nanoblocks” 50 are deposited in cavities 52 of complementary shape by a process called “Fluidic Self Assembly” (FSA).
- FSA Fluid Self Assembly
- the second phase P2 therefore comprises a first step E1 p 2 , which is illustrated by FIG. 8, during which the base plate 40 is drilled and / or machined, with a view to producing cavities in its upper face 48, or receptacles 52, for "nanoblocks". 50 and with a view to producing connection wells 54 passing through the base plate 40, opposite the connection pads 38.
- the base plate 40 here comprises a connection well 54 associated with each connection pad 38.
- connection well 54 associated with each connection pad 38.
- three connection wells 54 have been shown in section.
- connection wells 54 are not necessarily aligned. Thus, in the bottom view of Figure 13, it is noted that the connection wells 54 are offset from each other.
- the receptacles 52 and the wells 54 are advantageously produced here by removing material by means of a laser, according to a method known from the state of the art.
- the receptacles 52 and the wells 54 can be produced by other means, for example by moving the material by creep.
- the receptacles 52 must have a shape that is substantially complementary to the “nanoblocks” 50. They therefore each have here the shape of a section of pyramid with a vertical axis, the base of which is oriented upwards.
- the connection wells 54 have for example a frustoconical shape of vertical axis, the base being oriented upwards.
- connection wells 54 can have other shapes. They can for example having a cylinder shape or a parallelepiped shape.
- the frustoconical shape is the most advantageous, in particular with a view to guaranteeing a reliable electrical connection of the tracks with the connection pads 38.
- connection wells 54 are larger than the receptacles 52 since they extend throughout the thickness of the base plate 40, so as to open into the underside 42 of the base plate 40, in vis-à-vis at least part of the upper face 56 of an associated connection pad 38.
- connection wells 54 When these connection wells 54 are produced, it is preferable not to perforate the copper layer 44 forming the associated pads 38. The bottom of each connection well 54 is then formed by a part of the upper face 56 of the associated connection pad 38.
- the “nanoblocks” 50 are placed in the receptacles 52 associated with the upper face 48 of the base plate 40.
- the “nanoblocks” 50 are contained in a fluid which is poured onto the upper face 48 of the base plate 40, so that the “nanoblocks” 50 are deposited by gravity in the associated receptacles 52.
- the “nanoblocks” 50 being very light and of complementary shape to the receptacles 52, they are retained inside these receptacles 52 under the effect of atmospheric pressure which is applied to their upper face.
- connection wells 54 are of different shapes and dimensions of the receptacles 52, the “nanoblocks” 50 are not retained in the connection wells 54.
- the “nanoblocks” 50 can be placed in their receptacles 52 by a conventional method of the “pick and place” type, that is to say for example by means of a robotic arm which takes the “nanoblocks” 50 and deposits them one by one or in groups in the associated receptacles 52.
- One or the other of the two methods of arranging “nanoblocks” will be chosen, in particular as a function of the size of the “nanoblocks” and as a function of the desired productivity of the method of manufacturing the display module 10.
- a third phase P3 of the method according to the invention aims to produce connection tracks 58 of the display module 10 on the upper face 48 of the base plate 40 and to electrically connect these tracks 58 with the connection pads 38.
- This third phase P3 includes a first step
- E1 p 3 which is illustrated in FIG. 10, during which a metallization of the upper face 48 of the base plate 40 is carried out, that is to say that a layer of metal 60 is deposited which is conductive .
- the metal 60 is aluminum, but other metals, pure or alloyed, can be used.
- the aluminum 60 is deposited on the upper face 48 of the base plate 40 by evaporation according to a known method.
- the aluminum layer 60 therefore covers the
- connection wells and the walls 62 of the connection wells 54, including the parts of the connection pads 38 forming the bottom of the connection wells 54.
- the aluminum layer 60 therefore electrically connects the upper face 48 of the base plate 40 to the connection pads 38, through the connection wells 54.
- the aluminum layer 60 is etched by a known process of photolithography, or "etching", so as to produce the connection tracks 58 and l 'lower control electrode 64 on the upper face 48 of the base plate 40.
- discontinuous representation of the aluminum layer 60 aims to schematically illustrate the etched state of the aluminum and the connection tracks 58.
- the lower electrode 64 is for example made up of bars 66 of aluminum 60 which form numbers, as shown in FIG. 13.
- the lower electrode 64 here comprises twenty-eight bars
- Each bar 66 of a group of seven is electrically connected by a connection track to the same “nanoblock” 50, so that the latter can control the display of the desired figure.
- the display module 10 includes additional “nanoblocks” 50 which coordinate the display instructions.
- the connection tracks 58 are appropriately electrically connected to the connection pads 38 by means of the connection wells 54.
- connection wells 54 must not be superimposed with the bars 66 of the lower electrode 64 controlling the display.
- connection wells 54 are arranged outside the display areas, as in FIG. 13.
- connection tracks 58 and the lower electrode 64 can be produced by applying a conductive adhesive substance in a viscous state to the upper face 48 of the base plate 40.
- this substance for example an anisotropic conductive adhesive
- a deposition technique known as "dispensing” according to which a liquid or low viscosity substance is applied by means of a syringe, or a similar device. , with controlled flow and opening.
- the electrical connection of the pads 38 to the connection tracks 58 is carried out for example by filling the wells 54 with the conductive adhesive.
- connection tracks 58 and the lower electrode 64 by depositing a conductive ink by screen printing.
- the display module 10 is completed by arranging on the upper face 48 of the base plate 40 an electro-optical layer 68 and an upper electrode 70 according to a known production method.
- the upper electrode 70 is carried by the lower face 72 of a transparent protection plate 74.
- the upper electrode 70 is for example made up of a layer of titanium oxide which is deposited on the lower face 72.
- the upper electrode 70 is adequately connected electrically to the connection tracks 58.
- the display module 10 is of the passive type, that is to say that the electro-optical layer 68 absorbs or reflects the light emitted by an external source in a controllable manner.
- the display module 10 can be of the active type, that is to say that the electro-optical layer 68 comprises elements, for example light-emitting diodes, which emit light.
- the electro-optical layer 68 comprises for example liquid crystals or an electrophoretic device.
- the connection wells 54 are filled, after the aluminum layer 60 has been deposited, with a non-conductive protective resin 75.
- the electro-optical layer 68 can be of the bistable type, that is to say that it requires electric current only to change state. In the absence of a power supply, the screen therefore displays the image which corresponds to the last electrical control signal transmitted to the electrodes 64, 70. Thanks to the method according to the invention which has just been described, a module is obtained. display 10 provided with its connection pads 38, the total thickness of which is approximately 400 ⁇ m.
- connection pads 38 have substantially the shape of blocks which are nested one inside the other without being in contact.
- Each pad 38 has a portion arranged below at least one "nanoblocks”.
- each stud 38 is substantially rigid and pivots relative to the adjacent studs 38, around a substantially transverse axis.
- connection pads 38 offer great freedom in choosing the place of arrangement of the wells.
- connection 54 which makes it easier to produce connection tracks 58 which do not intersect.
- connection pads 38 offers great freedom of positioning of the display module 10 relative to external connection tracks, which makes it possible to use techniques for bonding the display module
- connection pads 38 which have a small thickness, for example of the order of 15 ⁇ m, while providing a rigid contact surface to allow simple interconnection of these connection pads 38 with other electronic devices, such as the main microcircuit, or chip, of a smart card, such as keys on a keyboard, such as power supply batteries.
- connection pads 38 are produced on the upper face of a secondary plate, for example a plate carrying a main microcircuit.
- the secondary plate is then fixed against the lower face 42 of the base plate 40, for example by bonding, so that the connection pads 38 are arranged opposite the associated connection wells 54.
- several display modules 10 can be produced simultaneously, for example in a large plastic plate which circulates between drive rollers, from one manufacturing step to another.
- the plate is cut so as to obtain independent display modules 10.
- FIG. 14 shows a first embodiment of a card 76 with integrated circuit (s), also called a chip card, which has in its upper face 78 contact tracks 80, a chip 82 or main microcircuit, and a display module 10 produced in accordance with the teachings of the invention, such as that which is represented in FIG. 12,
- the contact tracks 80 form an interface which allows electronic communication of the main microcircuit 82 with an external electronic device (not shown), or chip card reader, comprising an interface complementary to the contact tracks 80.
- the card 76 is generally presented in a conventional rectangular format, which is defined by international standards, the contact tracks 80 being for example precisely arranged in the vicinity of an angle of the upper face 78 of the card 76.
- the display module 10 is then arranged in the vicinity of another angle of the upper face 78 of the card 76, so that the display is oriented here on the same side as the contact tracks 80, upwards.
- the contact tracks 80 and the main microcircuit 82 belong to a module 92 which will be called "contact / chip module”.
- the contact tracks 80 are produced on the upper face 84 of an insulating plate 86 which has in its lower face 88 the main microcircuit 82 of the card 76, which is electrically connected to the contact tracks 80 by connection wells 90 similar to the wells 54 of the display module 10.
- This assembly forms the contacts / chip module 92.
- the underside 88 of the insulating plate 86 here has an etched aluminum layer 93 which forms connection tracks 89 and output pads for the main microcircuit 82.
- the contact / chip module 92 is here stuck in a cavity
- the display module 10 is produced according to the method which has been described with reference to FIGS. 5 to 13. It is arranged in a complementary cavity 100 which is arranged in the upper face 96 of the support plate 98.
- Connection tracks 102 are produced in the bottom of the cavities 94, 100 and on the upper face 96 of the support plate 98, so as to electrically connect the output pads of the main microcircuit 82 with the connection pads
- a protective film 104 is glued here on the upper face 96 of the support plate 98, over the connection tracks 102 and the display module 10, so as to isolate them from the outside.
- the protective film 104 includes a cutout 106 around the contact tracks 80, so that it is accessible from the outside, in order to allow the electrical connection and communication between the card reader and the main microcircuit 82.
- the protective film 104 is transparent at least above the display module 10, in order to make visible, from the outside, the image formed by this module 10.
- the display module 10 is controlled here by the main microcircuit 82.
- This type of smart card 76 comprising a display module 10 can be advantageously used in an application of the “electronic purse” or “e-purse” type.
- the user "loads" his card 76 with a sum of money by inserting the card 76 in a suitable reader.
- the main microcircuit 82 stores this sum of money and controls the “nanoblocks” 50 of the display module 10 so that the module 10 displays the figures corresponding to this sum of money.
- the main microcircuit 82 then drives the module 10 so that it displays the new amount of money available "in” the card 76.
- the use of a display module 10, the electro-optical layer 68 of which includes bistable sensitive elements, makes it possible to permanently display the amount of money available "in” the card 76, without that it is necessary to supply the display module 10 with electric current.
- Figures 16 and 17 show a second embodiment of a smart card 108 according to the invention.
- the contact tracks 80 of the chip card 108 are arranged on the back of the display module 10 and the main microcircuit 82 of the card 108 is arranged in the upper face 48 of the base plate 40 of the display module 10, that is to say substantially in the same plane as the “nanoblocks” 50.
- the assembly then forms a combined module 1 10 contacts / chip / display.
- the contact tracks 80 are produced for example according to a process similar to that which is described with reference to FIGS. 5 to 7.
- the main microcircuit 82 of the card 76 is then arranged in a complementary cavity which is arranged, for example by means of the realization of the receptacles 52 and the connection wells 54, in the upper face 48 of the base plate 40.
- the main microcircuit 82 is shown in dotted lines in FIG. 17 because it is arranged here in the vicinity of an edge of the base plate 40, so that it is offset with respect to the central display area comprising the lower control electrode 64.
- the main microcircuit 82 is electrically connected to the contact tracks 80 and to the “nanoblocks” via the connection tracks 58 of the display module 10.
- the base plate 40 delimits, with the protection plate 74 of the module display 10, a shoulder surface 12 oriented here upwards.
- This shoulder surface 1 12 is for example bare, so that one can deposit there a layer of glue 1 14, in order to ' stick the combined module 1 10 in a cavity 1 16 which is arranged in the lower face of the support plate 1 18 of the chip card 108 and which has a complementary shoulder surface 120.
- the support plate 1 18 of the smart card 108 is made of a transparent plastic material, so that it is not necessary to provide a cutout and a protective film, or to provide a transparent window, sure. the upper face of the support plate 1 18, to make visible the display area outside.
- the transparency of the support plate 1 18 of the smart card 108 can be exploited by making a magnifying glass in the thickness of the support plate 1 18, facing the display module 10, of so that the images formed by the display module 10 are seen enlarged.
- the contact tracks 80 are replaced by flat antenna elements 122, which are produced here according to a process analogous to the contact tracks 80, c ' is to say by depositing and etching a layer of copper.
- the combined module 110 is then an antenna / chip / display module which, when it is arranged in the support plate 118, makes it possible to produce a contactless chip card 108, that is to say that the smart card reader communicates with the main microcircuit 82 of the card 108 by means of radio waves which are picked up by the antenna 122 of the combined module 110.
- FIG. 19 Another variant of the third embodiment is shown in FIG. 19.
- contact tracks 80 and flat antenna elements 122 similar to those produced on the underside 42 of the base plate 40 are produced. those of Figures 17 and 18, so as to form a combined module 1 10 antenna / contacts / chip / display.
- connection wells which electrically connect the flat antenna elements 122 to the connection tracks 58 have not been shown, through the base plate 40.
- the smart card 108 which is equipped with such a combined module 1 10 antenna / contacts / chip / display is called combi-card, or hybrid card, because it can operate with a contactless card reader, or "contactless” reader , and with a card reader with contacts.
- FIG. 20 A third embodiment is shown in FIG. 20.
- the external appearance of this embodiment is similar to that which is represented in FIG. 16, with reference to the second embodiment, since the contact tracks 80 of the chip card 108 are also arranged under the display module 10.
- the third embodiment aims to arrange more than one active electronic layer under the display module 10, in order to perform complex functions in a combined module 1 1 1 of small bulk in volume.
- the combined module 1 1 1 consists of a display module 10, such as that which is represented in FIG. 12, which is arranged on a contact / chip module 92, such as that which is represented in FIG. 15.
- the combined module 1 1 1 is therefore here a contact / chip / display module.
- the connection tracks 58 of the display module 10 are electrically connected to the connection tracks 89 of the contact / chip module 92 directly through the connection wells 54 of the base plate 40.
- connection tracks 89 of the contacts / chips module 92 delimit, for example, pads 38 for the connection of the display module 10.
- the method for manufacturing the combined module 1 1 1 is as follows.
- the contacts / chips module 92 We start by making the contacts / chips module 92. On the underside of a plate 124 made of insulating material, for example plastic, the contact tracks 80 are produced according to a process analogous to that which is described with reference to the figures. 5 to 7.
- connection wells 128 opening opposite the contact tracks 80 and a cavity 130 for each of the main microcircuits 132, here two in number, for example according to a process analogous to that which is described with reference to FIG. 8.
- a part of the upper face of the plate 124 is then metallized, for example by depositing a layer of aluminum 134 by evaporation, and the aluminum layer 134 is etched to produce the connection tracks 89 and the connection pads 38, according to a process analogous to that which is described with reference to FIGS. 10 and 11.
- a layer of resin 136 for protection and insulation is deposited on the aluminum layer 134, which also makes it possible to fill the holes formed by the connection wells 126.
- the display module 10 is then produced directly on the contacts / chips module 92.
- the production of the display module 10 is then continued according to the method which is described with reference to FIGS. 8 to 13.
- connection wells 54 of the display module 10 are made so as to open opposite the connection pads 38, which are formed here by portions of the aluminum layer 134 deposited on the face. higher
- the combined module 1 1 1 is then arranged, for example by a “pick and place” type process, in a complementary cavity 140 arranged in the lower face 142 of a support plate 144 of the chip card 108, as in the second embodiment shown in FIG. 17.
- the combined module 1 1 1 is for example fixed in the cavity 140 by means of a layer of adhesive 143.
- the complementary cavity 140 opens here in - each face of the support plate 144 of the chip card 108.
- a transparent protective film 146 is fixed on the upper face 148 of the support plate 144 by means of a layer of adhesive 150.
- FIG. 21 shows a variant of the third embodiment in which the combined module 1 1 1 comprises flat antenna elements 152, 154, in addition to the contact tracks 80, so as to allow the operation of the chip card 108 with a contact reader and with a contactless reader.
- the combined module 1 1 1 comprises two layers of antenna elements 152, 154.
- a first layer of antenna elements 152 is produced thanks to the production of the contact tracks 80, by depositing and etching a layer of copper.
- a second layer of antenna elements 154 is produced thanks to the production of the connection tracks 89 on the upper face 126 of the plate 124 of the contact / chip module 92, by deposition and etching of a layer of aluminum 134.
- the antenna elements 152, 154 are therefore located here, respectively at the periphery of the contact tracks 80 and at the periphery of the connection tracks 89 of the aluminum layer 134 of the contact / chip module 92.
- the support plate 118, 144 of the chip card 108 does not have connection tracks in its thickness or on its faces. It is therefore possible to produce the support plate 1 18, 144 in a transparent material without the aesthetic appearance of the object, here the chip card 108, being deteriorated by the presence of a network of connecting tracks connecting several electronic devices distributed in different places, in the plane of the smart card 108.
- these embodiments make it possible to dispense with complex steps aimed at electrically connecting a microcircuit and a display module 10 which are located in two distinct places, in the plane of the smart card 108.
- the display module 10 produced by the method according to the invention can be arranged in other electronic devices, for example in an electronic label, in a calculator, in a token, or "tag”, etc.
- the display module 10 does not include “nanoblocks”, all “electronic intelligence” then being located outside of the display module 10, by example in the main microcircuit of a smart card.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Nonlinear Science (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
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- Credit Cards Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0100497A FR2819340B1 (fr) | 2001-01-10 | 2001-01-10 | Procede de raccordement electrique, module d'affichage et carte a puce obtenue selon ce procede |
FR01/00497 | 2001-01-10 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2002056377A2 true WO2002056377A2 (fr) | 2002-07-18 |
WO2002056377A3 WO2002056377A3 (fr) | 2003-02-27 |
WO2002056377B1 WO2002056377B1 (fr) | 2003-10-02 |
Family
ID=8858837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/000040 WO2002056377A2 (fr) | 2001-01-10 | 2002-01-08 | Procede de raccordement electrique module d'affichage et carte a puce obtenue selon ce procede. |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2819340B1 (fr) |
WO (1) | WO2002056377A2 (fr) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59143126A (ja) * | 1983-02-04 | 1984-08-16 | Kawaguchiko Seimitsu Kk | 液晶セル |
US6312304B1 (en) * | 1998-12-15 | 2001-11-06 | E Ink Corporation | Assembly of microencapsulated electronic displays |
-
2001
- 2001-01-10 FR FR0100497A patent/FR2819340B1/fr not_active Expired - Fee Related
-
2002
- 2002-01-08 WO PCT/FR2002/000040 patent/WO2002056377A2/fr not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
WO2002056377A3 (fr) | 2003-02-27 |
FR2819340B1 (fr) | 2007-07-27 |
WO2002056377B1 (fr) | 2003-10-02 |
FR2819340A1 (fr) | 2002-07-12 |
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