EP1599903A2 - Method for producing an electronic component or module and a corresponding component or module - Google Patents

Method for producing an electronic component or module and a corresponding component or module

Info

Publication number
EP1599903A2
EP1599903A2 EP04716631A EP04716631A EP1599903A2 EP 1599903 A2 EP1599903 A2 EP 1599903A2 EP 04716631 A EP04716631 A EP 04716631A EP 04716631 A EP04716631 A EP 04716631A EP 1599903 A2 EP1599903 A2 EP 1599903A2
Authority
EP
European Patent Office
Prior art keywords
module
conductive
component
components
coating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04716631A
Other languages
German (de)
French (fr)
Inventor
Jacky Jouan
Bachir Kordjani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sierra Wireless SA
Original Assignee
Wavecom SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wavecom SA filed Critical Wavecom SA
Publication of EP1599903A2 publication Critical patent/EP1599903A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
    • H05K3/403—Edge contacts; Windows or holes in the substrate having plural connections on the walls thereof
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/22—Secondary treatment of printed circuits
    • H05K3/28—Applying non-metallic protective coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
    • H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
    • H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
    • H01L23/3121—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed a substrate forming part of the encapsulation
    • 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
    • H01L23/49805—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers the leads being also applied on the sidewalls or the bottom of the substrate, e.g. leadless packages for surface mounting
    • H—ELECTRICITY
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    • 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
    • H01L23/5389—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 the chips being integrally enclosed by the interconnect and support structures
    • H—ELECTRICITY
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    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/141—One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters
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    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
    • H05K1/185—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit
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    • H01L2224/481—Disposition
    • H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48225—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
    • H01L2224/48227—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item
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    • H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
    • H01L2224/85—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a wire connector
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    • H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/42—Wire connectors; Manufacturing methods related thereto
    • H01L24/47—Structure, shape, material or disposition of the wire connectors after the connecting process
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    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
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    • H01L2924/19—Details of hybrid assemblies other than the semiconductor or other solid state devices to be connected
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    • H01L2924/1904—Component type
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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    • H05K2201/09436—Pads or lands on permanent coating which covers the other conductors
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    • H05K3/284—Applying non-metallic protective coatings for encapsulating mounted components
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    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/341—Surface mounted components
    • H05K3/3431—Leadless components
    • H05K3/3442—Leadless components having edge contacts, e.g. leadless chip capacitors, chip carriers
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    • H05K3/46—Manufacturing multilayer circuits
    • H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.

Definitions

  • the field of the invention is that of manufacturing complex electronic components, and in particular, but not exclusively, modules, grouping together in the form of a single and compact package a set of components on a substrate, so as to be implanted on a printed circuit in the form of a single element.
  • such a module can group together the essential components and software necessary for the operation of this terminal.
  • two (or more) modules can be provided, in particular to optimize space management. In this case, they are advantageously interconnected digitally.
  • the invention provides a new and very effective solution to this objective.
  • the modules comprise a substrate, one side of which receives the components, and the other side of the interconnection structure. It is thus possible to obtain a small thickness. In return, the surface occupied is relatively large, and determined by the components and their possible shielding.
  • the other side can be kept without components, but there is again a loss of space, to receive components and shielding.
  • an objective of the invention is to provide a technique making it possible to reduce the size, and in particular the surface occupied on a substrate, of a module or of an electronic component, while of course retaining all the functionalities of this module. or this component.
  • Another objective of the invention is to provide such a technique, making it possible to simplify the connection, and the mounting on a printed circuit.
  • an objective of the invention is to make it possible to dispense with connector components on a module.
  • Yet another objective of the invention is to provide such a technique, making it possible to optimize the shielding of the components, and for example to allow selective shielding of an element.
  • the invention also aims to provide such a technique, which makes it possible to produce complex and compact modules at an acceptable manufacturing cost, and using accessible technologies.
  • Yet another objective of the invention is to provide such a technique, which allows the production of components or modules, themselves allowing the production of new devices, at least in their shape or design, due to their reduced size and of their effectiveness. 4. Main characteristics of the invention
  • this method comprises at least one step of coating with an insulating material at least one part of said module and at least one step of making, on a part of said insulating material, at least at least one conductive zone, so as to define zones forming and / or capable of receiving at least part of a component and / or at least one interconnection element.
  • At least one of said conductive zones thus defines an interconnection structure, enabling said module to be attached to a printed circuit.
  • said interconnection structure advantageously has at least one connection point, and at least one corresponding link, extending over at least one lateral edge of said housing up to said substrate.
  • said interconnection structure allows direct mounting on a printed circuit by soldering (without external interconnection element).
  • said interconnection structure can allow mounting on a printed circuit according to the CMS technique.
  • At least one of said conductive zones defines a passive component (or a portion of such a passive component).
  • the said passive component or components may in particular belong to the group comprising the capacitors, the inductors and the resistors, as well as their combinations.
  • At least one of said conductive zones is an electrode of a capacity whose dielectric is formed by said insulating material. This can in particular make it possible to optimize the decoupling of the inputs / outputs.
  • the method preferably comprises producing at least two conductive zones designed to receive at least one component. It is thus possible to attach one or more components to the surface of the module (or component). They can be mounted for example by soldering or by bonding to the surface of the module.
  • the method advantageously comprises a step of prior coating of at least a portion of said components, and a step of metallization of the coated portion, in order to ensure electromagnetic shielding, then a final coating step.
  • the final coating can then be carried out by overmolding.
  • an independent shielding of at least two subsets of components is carried out.
  • at least one of said subassemblies is connected to an external radiator.
  • said steps of coating and producing at least one conductive zone are repeated at least once. It is thus possible to further optimize the compactness of the module.
  • the method comprises the implementation of a metallization layer forming a ground plane.
  • At least one opening is made filled with a conductive material passing through at least one coating layer.
  • the said opening (s) may in particular be conical or frustoconical. They are for example produced by mechanical drilling, laser drilling, chemical attack or molding of the coating.
  • the said opening or openings are filled with a conductive material by screen printing or filling under pressure, chemical and / or electrochemical baths.
  • said insulating material is a plastic material.
  • said insulating material has a coefficient of thermal expansion chosen so that it is compatible with that of the printed circuit material on which said component or module will be attached.
  • said coating step is selective, so as to spare at least a surface portion of said substrate, so as to present electrical continuity between at least one of said conductive areas and at least one of said surface portions.
  • Said coating step can in particular be carried out by casting material, injecting material or transferring material, then polymerization or sintering.
  • Said step of producing at least one conductive zone advantageously comprises a step of metallizing the surface of said insulating material and a step of making geometric shapes making it possible to remove part of said metallization.
  • Said metallization step may in particular comprise a surface treatment with at least one chemical and / or electrochemical bath, conductive paint, spraying of conductive elements and / or vaporization under vacuum.
  • Said step of producing geometric shapes advantageously comprises a three-dimensional engraving by laser or by revelation selective (“MID”: “Molded Interconnection Device”) or a chemical attack.
  • the method may further comprise a step of depositing a film of photosensitive organic material on said coating and the one or more conductive zones.
  • the method advantageously comprises a step of producing at least one heat sink to help evacuate the heat produced by at least one of said components.
  • a component or module according to the invention comprises an insulating material coating at least a part of said module and at least one conductive zone on a part of said insulating material, so as to define zones forming and / or capable of receiving at least part d6 component and / or at least one interconnection element.
  • at least one of said conductive zones defines an interconnection structure, making it possible to attach said module to a printed circuit.
  • said module or component carries at least one passive component defined by at least said conductive zones.
  • said module or component can in particular comprise at least one capacitor, the dielectric of which is formed by said insulating material and at least one electrode by one of said conductive zones.
  • said module or component carries at least one component connected to at least two of said conductive zones. 5.
  • FIGS. 1A and 1B show, respectively, seen from below, and from the side, a first example of a module according to the invention
  • FIG. 2 illustrates the module of Figures 1A and 1B reported on a printed circuit
  • FIGS. 4A and 4B show the case of a capacitive effect produced according to the technique of the invention
  • the invention is therefore based on a completely new approach to the manufacture of modules, or components, based in particular on the use of a coating as a support for conductive areas, on one or more faces and on one or more levels, these conductive zones having an active role of connection, components and / or shielding.
  • the coating and conductive zone deposits can be iterated several times, and can be carried out selectively on portions of the module or of the component.
  • This approach thus makes it possible to free up the surface on the module substrate, and therefore to limit the surface that the latter occupies on a printed circuit.
  • This can in particular make it possible to incorporate shielding on and into the coating, of the interconnection on the coating surface, components buried in the coating, and / or components mounted on the surface of the coating.
  • the invention proposes a new architecture in three dimensions of housing for electronic modules, or for components, with an insulating coating and selective metallizations making it possible to integrate:
  • an interconnection structure for example of the CMS type; electromagnetic shielding, which can be selective;
  • FIGS. 1A and 1B illustrate a first embodiment of a module according to the invention, respectively seen from below and from the side.
  • the substrate 11 on which components have conventionally been mounted. These components have been reported on both sides.
  • the insulating coating 13 was then deposited on each of these faces 1. This coating can also cover a shield.
  • conductive zones 14 On the underside (FIG. 1A), and more precisely on the surface of the coating, conductive zones 14 have been produced, which define an interconnection structure.
  • Each interconnection element can be connected to the substrate 11 (and more precisely a component carried by the latter) by a conductive track 15, which extends on the lateral edge of the housing (FIG. 1B).
  • a conductive track 15 which extends on the lateral edge of the housing (FIG. 1B).
  • components 16 and 17 have also been transferred to the surface, which can be connected in the same way to the substrate, or by means of through elements provided for this purpose.
  • This module can thus be directly attached to a printed circuit 21, such as a customer application card, as illustrated in FIG. 2.
  • the connection with this circuit 21 is ensured directly by the interconnections 14 produced on the surface of coating, without the need for any interposers.
  • a very simple CMS type assembly is thus obtained, and having a reduced thickness.
  • the area occupied is also limited, because certain components 16 and 17 are not present on the substrate 11, but attached to the surface of the housing. As already indicated, these components could also be on an intermediate layer, itself again covered with a coating, then if necessary, new components
  • Figures 3A to 3F illustrate an example of manufacturing a module according to the technique of the invention.
  • a substrate 31 on a substrate 31 are conventionally reported components 32, preferably distributed, so as on the one hand to optimize the use of the surface, and on the other hand to group the components according to their function, or even to move away the components likely to be disturbed, for example due to interference.
  • the components are grouped into two zones corresponding respectively to the baseband and to the radio frequency of a radiotelephony module;
  • FIG. 3B the two baseband and RF groups receive a selective coating insulator 33, 34, for example according to a technology provided for making plastic boxes;
  • FIG. 3C the surface of these two coated areas 33 and 34 is metallized (35), for example by chemical bath or painting, so as to ensure efficient and selective shielding, for each of the functions.
  • this shielding known per se, has the advantage of a reduced cost not requiring the purchase and assembly of components such as a metal box;
  • FIG. 3D a plastic overmolding 36, is then attached to the entire upper part of the module, so as to form a housing;
  • FIG. 3E according to the invention, a metallization 37 is applied to the complete surface of the overmolded housing 36, by a suitable surface treatment;
  • part of the metallization 37 is removed, so as to define the conductive zones 38 corresponding, in the example illustrated, to the tracks and pads of an interconnection structure, according for example to an etching technique in three dimensions.
  • FIGS. 3E and 3F can be replaced by a single step of direct production of the desired conductive areas, for example by screen printing.
  • FIG. 4A schematically presents the electrodes of a capacity produced according to the invention
  • FIG. 4B illustrates the corresponding electrical diagram.
  • the pad 38 (FIG. 3F) is thus not only a connection element, but also an electrode 41 with a capacity 42, the other electrode 43 of which is formed by an internal conductive zone, produced before the last layer of coating, and which can for example be a ground plane (corresponding for example to an internal shielding).
  • the technique of the invention also makes it possible to optimize the distribution of the components by mounting some of them on at least one of the faces of the module.
  • the conductive areas 51 are electrical tracks, allowing the interconnection of the components 52 and 53 mounted on the surface with the other components of the substrate 54. They can in particular be SMD components 52, or wired components ("wire bonding" or "ftip chip”);
  • the housings 61, 62 will be covered with a coating, and if necessary with a shield.
  • é.6 Details on the manufacture of modules or components according to the invention The invention therefore makes it possible to produce electronic modules, or components, in the form of a coated housing provided with a series of one or more coatings of materials electrically insulating sandwiched between one or more deposits of electrically conductive layers, the definition of geometric shapes on the surface can simultaneously ensure at least some of the following functions:
  • the electromagnetic shielding of the invention makes it possible to associate an internal shielding and an external shielding of one or more regions of the module, by the production of a conductive envelope around the components of each of these regions, according to the principle of a Faraday cage brought back to earth.
  • This deposition of conductive layers can in particular be carried out by:
  • the insulating coating receiving this layer is advantageously selective, in the choice of materials, and in order to save defined surfaces of the substrate so as to present electrical continuity between the conductive deposit on the coating and the mass of the substrate.
  • This insulating coating can for example be produced by: - material casting and polymerization or sintering;
  • the interconnection structure which can be produced on an electronic module according to the invention, associates conductive terminations for the interconnection, in the form of pads of configurable geometric shapes, connected by tracks to the signal outputs of the substrate, themselves distributed on the surface or on the edge of the latter.
  • These geometric shapes of the conductive deposit on the three-dimensional surface of the insulating coating can in particular be produced by: - etching of an initially uniform conductive deposit;
  • a module or a component according to the invention can implement several iterations of depositing electrically conductive and insulating materials, so as to receive even more elements or functions.
  • components mounted on the surface by soldering or gluing can be transferred onto conductive imprints made on the final surface of the module.
  • the insulating material for the coating supporting the conductive interconnection is chosen so that it has a coefficient of thermal expansion compatible with that of the material of the printed circuit on which it will be transferred.
  • a film for example of photosensitive organic material
  • one or more holes are advantageously made, for example cylindrical or conical, in the insulating layers, and which will be filled with conductive materials.
  • interconnections in the volume of the coating are for example obtained by: - mechanical or laser drilling; chemical attack or any material removal process;
  • the deposition of conductive material in these holes can in particular be carried out by: screen printing or filling under pressure;
  • the interconnections in the volume can be used to connect the heat source components to ground planes, the latter then being connected to the printed circuit.
  • the electrically insulating elements can also be chosen to be thermally conductive, in particular when they coat heat source components, so as to dissipate this heat towards the outside, and for example towards radiators.

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Abstract

The invention relates to a method for producing a component or a module comprising a component assembly arranged on a substrate in a housing which is mountable on a printed circuit. The inventive method consists of at least one stage when at least one part of the module is coated with an insulating material, and at least one stage when at least one conductive area is produced on one part of said insulating material in such a way that the areas forming and/or receiving at least one part of the component and/or at least one interconnection element are defined.

Description

Procédé de fabrication d'un composant ou d'un module électronique, et composant ou module correspondant. Method of manufacturing an electronic component or module, and corresponding component or module.
1. Domaine de l'invention1. Field of the invention
Le domaine de l'invention est celui de la fabrication des composants électroniques complexes, et notamment, mais non exclusivement, des modules, regroupant sous la forme d'un boîtier unique et compact un ensemble de composants sur un substrat, de façon à être implanté sur un circuit imprimé sous la forme d'un unique élément.The field of the invention is that of manufacturing complex electronic components, and in particular, but not exclusively, modules, grouping together in the form of a single and compact package a set of components on a substrate, so as to be implanted on a printed circuit in the form of a single element.
Par exemple, dans le cas d'un terminal de télécommunications, un tel module peut regrouper les composants et les logiciels essentiels nécessaires au fonctionnement de ce terminal. Dans certains cas, deux (ou plus) modules peuvent être prévus, de façon notamment à optimiser la gestion de l'espace. Dans ce cas, ils sont avantageusement interconnectés de façon numérique.For example, in the case of a telecommunications terminal, such a module can group together the essential components and software necessary for the operation of this terminal. In some cases, two (or more) modules can be provided, in particular to optimize space management. In this case, they are advantageously interconnected digitally.
Dans le domaine de la fabrication des composants et des modules électroniques, un objectif majeur est la réduction de l'encombrement global, et en particulier la réduction de la surface occupée sur un circuit imprimé.In the field of the manufacture of electronic components and modules, a major objective is the reduction of the overall dimensions, and in particular the reduction of the surface occupied on a printed circuit.
L'invention apporte une solution nouvelle et très efficace à cet objectif.The invention provides a new and very effective solution to this objective.
2. L'art antérieur 2.1. Distinction modules et composants2. The prior art 2.1. Distinction between modules and components
Par la suite, on présente notamment les inconvénients d'un module. Comme on le verra par la suite, l'invention peut également s'appliquer au cas d'un composant plus classique. Certains des inconvénients discutés ci-dessous s'appliquent également à ces composants. On ne présente donc ci-après que le cas plus complexe d'un module, qui fait apparaître de façon plus cruciale encore les inconvénients de l'art antérieur.Subsequently, the disadvantages of a module are presented in particular. As will be seen below, the invention can also be applied to the case of a more conventional component. Some of the disadvantages discussed below also apply to these components. We therefore only present below the more complex case of a module, which makes the drawbacks of the prior art appear even more crucially.
2.2. Extraction des composants encombrants Une première solution pour réduire l'encombrement d'un module est bien sûr d'en sortir un ou plusieurs composants parmi les plus encombrants, et de reporter ceux-ci directement sur le circuit imprimé client.2.2. Extraction of bulky components A first solution to reduce the size of a module is of course to take out one or more of the most cumbersome components, and to transfer these directly to the customer's printed circuit.
Cette solution n'est cependant pas souhaitable, puisque le module n'est plus alors une solution complète, et que l'on rajoute une complexité de montage (plusieurs composants à monter sur le circuit imprimé), et qu'il est en outre nécessaire de prévoir des connexions entre les différents éléments.However, this solution is not desirable, since the module is no longer a complete solution, and an assembly complexity is added (several components to be mounted on the printed circuit), and it is also necessary to provide connections between the different elements.
2.3. Les modules CMS mono face2.3. Single-sided CMS modules
Généralement, les modules comprennent un substrat dont une face reçoit les composants, et l'autre face la structure d'interconnexion. Il est ainsi possible d'obtenir une faible épaisseur. En contrepartie, la surface occupée est relativement importante, et déterminée par les composants et leur blindage éventuel.Generally, the modules comprise a substrate, one side of which receives the components, and the other side of the interconnection structure. It is thus possible to obtain a small thickness. In return, the surface occupied is relatively large, and determined by the components and their possible shielding.
Sur la face dédiée à l'interconnexion, toute la surface n'est en revanche pas occupée, ce qui induit à une perte de place.On the face dedicated to interconnection, the entire surface is not occupied, which leads to a loss of space.
2.4. Les modules à composants et interconnexion sur une même face Partant de cette constatation, il a été proposé de disposer sur une même face la structure d'interconnexion et au moins certains des composants. C'est alors cette face qui détermine la surface nécessaire pour le module. Cela entraîne bien sûr une perte de la surface disponible pour l'interconnexion.2.4. The modules with components and interconnection on the same face On the basis of this observation, it has been proposed to have the interconnection structure and at least some of the components on the same face. It is then this face which determines the surface required for the module. This of course leads to a loss of the area available for interconnection.
L'autre face peut être conservée sans composants, mais il y a à nouveau une perte de place, pour recevoir des composants et le blindage.The other side can be kept without components, but there is again a loss of space, to receive components and shielding.
D'une façon générale, on constate qu'il n'existe pas de solution optimisant l'utilisation de la surface disponible et donc permettant de réduire la surface occupée par le module sur un circuit imprimé.Generally, it can be seen that there is no solution optimizing the use of the available surface and therefore making it possible to reduce the surface occupied by the module on a printed circuit.
La présence d'un blindage, généralement nécessaire sur ce module, notamment lorsqu'il met en œuvre des composants RF, augmente encore cet encombrement. Par ailleurs, ces composants ou modules présentent généralement un coût élevé lié entre autres aux éléments annexes tels que les connecteurs, les composants passifs ou les composants métalliques de blindage, qui augmentent en outre l'encombrement. Ainsi, il est généralement nécessaire de prévoir un blindage métallique et une structure d'interconnexion. De même, la mise en œuvre de composants passifs, tels que des condensateurs ou des résistances rajoutent à la complexité du montage et à l'encombrement global. 3. Objectifs de l'invention L'invention a notamment pour objectif de pallier ces inconvénients de l'état de l'art.The presence of shielding, generally necessary on this module, in particular when it implements RF components, further increases this space requirement. Furthermore, these components or modules generally have a high cost linked inter alia to ancillary elements such as connectors, passive components or metal shielding components, which also increase the bulk. Thus, it is generally necessary to provide a metal shield and an interconnection structure. Similarly, the implementation of passive components, such as capacitors or resistors add to the complexity of the assembly and the overall size. 3. Objectives of the invention The object of the invention is in particular to overcome these drawbacks of the state of the art.
Plus précisément, un objectif de l'invention est de fournir une technique permettant de réduire la taille, et notamment la surface occupée sur un substrat, d'un module ou d'un composant électronique, en conservant bien sûr toutes les fonctionnalités de ce module ou de ce composant.More specifically, an objective of the invention is to provide a technique making it possible to reduce the size, and in particular the surface occupied on a substrate, of a module or of an electronic component, while of course retaining all the functionalities of this module. or this component.
Un autre objectif de l'invention est de fournir une telle technique, permettant de simplifier la connectique, et le montage sur un circuit imprimé. En particulier, un objectif de l'invention est de permettre de se passer de composants connecteurs sur un module. Encore un autre objectif de l'invention est de fournir une telle technique, permettant d'optimiser le blindage des composants, et par exemple de permettre un blindage sélectif d'un élément.Another objective of the invention is to provide such a technique, making it possible to simplify the connection, and the mounting on a printed circuit. In particular, an objective of the invention is to make it possible to dispense with connector components on a module. Yet another objective of the invention is to provide such a technique, making it possible to optimize the shielding of the components, and for example to allow selective shielding of an element.
L'invention a également pour objectif de fournir une telle technique, qui permet de réaliser des modules complexes et compacts à un coût de fabrication acceptable, et en utilisant des technologies accessibles.The invention also aims to provide such a technique, which makes it possible to produce complex and compact modules at an acceptable manufacturing cost, and using accessible technologies.
Encore un autre objectif de l'invention est de fournir une telle technique, qui permet la réalisation de composants ou de modules, permettant eux-mêmes la réalisation de dispositifs nouveaux, au moins dans leur forme ou design, du fait de leur encombrement réduit et de leur efficacité. 4. Caractéristiques principales de l'inventionYet another objective of the invention is to provide such a technique, which allows the production of components or modules, themselves allowing the production of new devices, at least in their shape or design, due to their reduced size and of their effectiveness. 4. Main characteristics of the invention
Ces objectifs, ainsi que d'autres qui apparaîtront par la suite sont atteints à l'aide d'un procédé de fabrication d'un composant ou d'un module regroupant dans un boîtier prêt à monter sur circuit imprimé un ensemble de composants montés sur un substrat. Selon l'invention, ce procédé comprend au moins une étape d'enrobage à l'aide d'un matériau isolant d'au moins une partie dudit module et au moins une étape de réalisation, sur une partie dudit matériau isolant, d'au moins une zone conductrice, de façon à définir des zones formant et/ou pouvant recevoir au moins une partie d'un composant et/ou au moins un élément d'interconnexion.These objectives, as well as others which will appear subsequently, are achieved using a process for manufacturing a component or a module grouping together in a box ready to mount on a printed circuit a set of components mounted on a substrate. According to the invention, this method comprises at least one step of coating with an insulating material at least one part of said module and at least one step of making, on a part of said insulating material, at least at least one conductive zone, so as to define zones forming and / or capable of receiving at least part of a component and / or at least one interconnection element.
Ainsi, comme on le verra par la suite, il est possible d'obtenir un dispositif plus compact, pouvant regrouper plus de composants et intégrant certains composants passifs, éléments d'interconnexion et blindages sans achat de composant spécifique, mais seulement en adaptant le process de fabrication. Le dispositif obtenu peut en outre être monté simplement et directement sur un circuit imprimé.Thus, as we will see later, it is possible to obtain a more compact device, able to group more components and integrating certain passive components, interconnection elements and shields without purchasing a specific component, but only by adapting the process Manufacturing. The device obtained can also be mounted simply and directly on a printed circuit.
Selon un premier aspect de l'invention préférentiel, au moins une desdites zones conductrices définit ainsi une structure d'interconnexion, permettant de rapporter ledit module sur un circuit imprimé. Dans ce cas, ladite structure d'interconnexion présente avantageusement au moins un point de connexion, et au moins une liaison correspondante, se prolongeant sur au moins un bord latéral dudit boîtier jusqu' audit substrat.According to a first aspect of the preferred invention, at least one of said conductive zones thus defines an interconnection structure, enabling said module to be attached to a printed circuit. In this case, said interconnection structure advantageously has at least one connection point, and at least one corresponding link, extending over at least one lateral edge of said housing up to said substrate.
Selon un mode de réalisation préférentiel, ladite structure d'interconnexion permet un montage direct sur un circuit imprimé par brasage (sans élément externe d'interconnexion).According to a preferred embodiment, said interconnection structure allows direct mounting on a printed circuit by soldering (without external interconnection element).
Notamment, ladite structure d'interconnexion peut permettre un montage sur un circuit imprimé selon la technique CMS.In particular, said interconnection structure can allow mounting on a printed circuit according to the CMS technique.
Selon un deuxième aspect avantageux de l'invention, au moins une desdites zones conductrices définit un composant passif (ou une portion d'un tel composant passif). Le ou lesdits composants passifs peuvent notamment appartenir au groupe comprenant les capacités, les inductances et les résistances, ainsi que leurs combinaisons.According to a second advantageous aspect of the invention, at least one of said conductive zones defines a passive component (or a portion of such a passive component). The said passive component or components may in particular belong to the group comprising the capacitors, the inductors and the resistors, as well as their combinations.
De façon avantageuse, au moins une desdites zones conductrices est une électrode d'une capacité dont le diélectrique est formé par ledit matériau isolant. Cela peut notamment permettre d'optimiser le découplage des entrées/sorties.Advantageously, at least one of said conductive zones is an electrode of a capacity whose dielectric is formed by said insulating material. This can in particular make it possible to optimize the decoupling of the inputs / outputs.
Selon un troisième aspect de l'invention, le procédé comprend preférentiellement la réalisation d'au moins deux zones conductrices conçues pour recevoir au moins un composant. II est ainsi possible de rapporter un ou plusieurs composants sur la surface du module (ou composant). Ils peuvent être montés par exemple par brasure ou par collage sur la surface du module.According to a third aspect of the invention, the method preferably comprises producing at least two conductive zones designed to receive at least one component. It is thus possible to attach one or more components to the surface of the module (or component). They can be mounted for example by soldering or by bonding to the surface of the module.
Selon un quatrième aspect de l'invention, le procédé comprend avantageusement une étape d'enrobage préalable d'au moins une partie desdits composants, et une étape de metallisation de la partie enrobée, afin d'assurer un blindage électro-magnétique, puis une étape d'enrobage final.According to a fourth aspect of the invention, the method advantageously comprises a step of prior coating of at least a portion of said components, and a step of metallization of the coated portion, in order to ensure electromagnetic shielding, then a final coating step.
L'enrobage final peut alors être réalisée par surmoulage.The final coating can then be carried out by overmolding.
De façon avantageuse, on effectue un blindage indépendant d'au moins deux sous-ensembles de composants. Preférentiellement, si des composants générateurs de chaleur sont présents, au moins un desdits sous-ensembles est relié à un radiateur externe.Advantageously, an independent shielding of at least two subsets of components is carried out. Preferably, if heat generating components are present, at least one of said subassemblies is connected to an external radiator.
Selon une caractéristique avantageuse de l'invention, lesdites étapes d'enrobage et de réalisation d'au moins une zone conductrice sont réitérées au moins une fois. II est ainsi possible d'optimiser encore la compacité du module.According to an advantageous characteristic of the invention, said steps of coating and producing at least one conductive zone are repeated at least once. It is thus possible to further optimize the compactness of the module.
Selon un aspect particulier de l'invention, le procédé comprend la mise en œuvre d'une couche de metallisation formant plan de masse.According to a particular aspect of the invention, the method comprises the implementation of a metallization layer forming a ground plane.
De façon avantageuse, on réalise au moins une ouverture remplie d'un matériau conducteur traversant au moins une couche d'enrobage. Cela permet d'interconnecter plusieurs couches entre elles ou avec le substrat. La ou lesdites ouvertures peuvent notamment être coniques ou tronconiques. Elles sont par exemple réalisées par perçage mécanique, perçage laser, attaque chimique ou moulage de l'enrobage.Advantageously, at least one opening is made filled with a conductive material passing through at least one coating layer. This makes it possible to interconnect several layers with each other or with the substrate. The said opening (s) may in particular be conical or frustoconical. They are for example produced by mechanical drilling, laser drilling, chemical attack or molding of the coating.
Avantageusement, la ou lesdites ouvertures sont remplies d'un matériau conducteur par sérigraphie ou remplissage sous pression, bains chimiques et/ou électrochimiques.Advantageously, the said opening or openings are filled with a conductive material by screen printing or filling under pressure, chemical and / or electrochemical baths.
Selon une autre caractéristique de l'invention, ledit matériau isolant est un matériau plastique.According to another characteristic of the invention, said insulating material is a plastic material.
De façon préférentielle, ledit matériau isolant présente un coefficient d'expansion thermique choisi de façon qu'il soit compatible avec celui du matériau de circuit imprimé sur lequel ledit composant ou module sera rapporté.Preferably, said insulating material has a coefficient of thermal expansion chosen so that it is compatible with that of the printed circuit material on which said component or module will be attached.
Cela permet de fiabiliser le montage sur le circuit imprimé.This makes the mounting on the printed circuit more reliable.
Avantageusement, ladite étape d'enrobage est sélective, de façon à épargner au moins une portion de surface dudit substrat, de façon à présenter une continuité électrique entre au moins une desdites zones conductrices et au moins une desdites portions de surface.Advantageously, said coating step is selective, so as to spare at least a surface portion of said substrate, so as to present electrical continuity between at least one of said conductive areas and at least one of said surface portions.
Ladite étape d'enrobage peut être notamment réalisée par coulée de matière, injection de matière ou transfert de matière, puis polymérisation ou frittage. Ladite étape de réalisation d'au moins une zone conductrice comprend quant à elle avantageusement une étape de metallisation de la surface dudit matériau isolant et une étape de réalisation de formes géométriques permettant de supprimer une partie de ladite metallisation.Said coating step can in particular be carried out by casting material, injecting material or transferring material, then polymerization or sintering. Said step of producing at least one conductive zone advantageously comprises a step of metallizing the surface of said insulating material and a step of making geometric shapes making it possible to remove part of said metallization.
Ladite étape de metallisation peut notamment comprendre un traitement de surface par au moins un bain chimique et/ou électrochimique, peinture conductrice, pulvérisation d'éléments conducteurs et/ou vaporisation sous vide.Said metallization step may in particular comprise a surface treatment with at least one chemical and / or electrochemical bath, conductive paint, spraying of conductive elements and / or vaporization under vacuum.
Ladite étape de réalisation de formes géométriques comprend avantageusement une gravure en trois dimensions par laser ou par révélation sélective (« MID » : « Molded Interconnection Device ») ou une attaque chimique.Said step of producing geometric shapes advantageously comprises a three-dimensional engraving by laser or by revelation selective (“MID”: “Molded Interconnection Device”) or a chemical attack.
De façon avantageuse, le procédé peut comprendre en outre une étape de dépôt d'un film en matière organique photosensible sur ledit enrobage et la ou lesdites zones conductrices.Advantageously, the method may further comprise a step of depositing a film of photosensitive organic material on said coating and the one or more conductive zones.
Selon un autre aspect de l'invention, le procédé comprend de façon avantageuse une étape de réalisation d'au moins un drain thermique pour aider à l'évacuation de la chaleur produite par au moins un desdits composants.According to another aspect of the invention, the method advantageously comprises a step of producing at least one heat sink to help evacuate the heat produced by at least one of said components.
L'invention concerne également les composants et les modules obtenus selon le procédé décrit ci-dessus. Dans la présente description, on utilise plus souvent le terme module. Il est clair cependant que la plupart des aspects (à l'exception de ceux spécifiques des modules, et liés notamment au fait qu'un tel module regroupe plusieurs composants) peuvent s'appliquer de la même façon à un composant et à un module. Plus généralement, un composant ou un module selon l'invention comprend un matériau isolant enrobant au moins une partie dudit module et au moins une zone conductrice sur une partie dudit matériau isolant, de façon à définir des zones formant et/ou pouvant recevoir au moins une partie d 6un composant et/ou au moins un élément d'interconnexion. De façon avantageuse, au moins une desdites zones conductrices définit une structure d'interconnexion, permettant de rapporter ledit module sur un circuit imprimé.The invention also relates to the components and modules obtained according to the method described above. In the present description, the term module is used more often. It is clear, however, that most aspects (with the exception of those specific to modules, and linked in particular to the fact that such a module brings together several components) can be applied in the same way to a component and to a module. More generally, a component or module according to the invention comprises an insulating material coating at least a part of said module and at least one conductive zone on a part of said insulating material, so as to define zones forming and / or capable of receiving at least part d6 component and / or at least one interconnection element. Advantageously, at least one of said conductive zones defines an interconnection structure, making it possible to attach said module to a printed circuit.
Preférentiellement, ledit module ou composant porte au moins un composant passif défini par au moins desdites zones conductrices. Ainsi, il peut notamment comprendre au moins une capacité dont le diélectrique est formé par ledit matériau isolant et au moins une électrode par une desdites zones conductrices.Preferably, said module or component carries at least one passive component defined by at least said conductive zones. Thus, it can in particular comprise at least one capacitor, the dielectric of which is formed by said insulating material and at least one electrode by one of said conductive zones.
De façon avantageuse, ledit module ou composant porte au moins un composant connecté à au moins deux desdites zones conductrices. 5. Liste des figures D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante de modes de réalisation préférentiels de l'invention, donnés à titre de simples exemples illustratifs et non limitatifs, et des dessins annexés, parmi lesquels : - les figures 1A et 1B présentent, respectivement, vu de dessous, et de côté, un premier exemple de module selon l'invention ;Advantageously, said module or component carries at least one component connected to at least two of said conductive zones. 5. List of figures Other characteristics and advantages of the invention will appear more clearly on reading the following description of preferred embodiments of the invention, given by way of simple illustrative and nonlimiting examples, and of the appended drawings, among which: - FIGS. 1A and 1B show, respectively, seen from below, and from the side, a first example of a module according to the invention;
- la figure 2 illustre le module des figures 1A et 1B rapporté sur un circuit imprimé ;- Figure 2 illustrates the module of Figures 1A and 1B reported on a printed circuit;
- les figures 3A à 3F illustrent différentes étapes de fabrication d'un exemple de module selon l'invention ; les figures 4A et 4B présentent le cas d'un effet capacitif réalisé selon la technique de l'invention ;- Figures 3A to 3F illustrate different stages of manufacturing an example of a module according to the invention; FIGS. 4A and 4B show the case of a capacitive effect produced according to the technique of the invention;
- la figure 5 présente un exemple de report de composants sur un module selon l'invention ; - la figure 6 illustre un autre exemple d'implantation de composants dans un module selon l'invention. 6. Description de modes de réalisation préférentiels de l'invention 6.1 Rappel du principe de Vinvention- Figure 5 shows an example of transfer of components to a module according to the invention; - Figure 6 illustrates another example of implantation of components in a module according to the invention. 6. Description of preferential embodiments of the invention 6.1 Reminder of the principle of the invention
L'invention repose donc sur une approche tout à fait nouvelle de la fabrication des modules, ou des composants, reposant notamment sur l'utilisation d'un enrobage comme support de zones conductrices, sur une ou plusieurs faces et sur un ou plusieurs niveaux, ces zones conductrices ayant un rôle actif de connexion, de composants et/ou de blindage.The invention is therefore based on a completely new approach to the manufacture of modules, or components, based in particular on the use of a coating as a support for conductive areas, on one or more faces and on one or more levels, these conductive zones having an active role of connection, components and / or shielding.
Les dépôts d'enrobage et de zones conductrices peuvent être itérés plusieurs fois, et être effectués de façon sélective sur des portions du module ou du composant.The coating and conductive zone deposits can be iterated several times, and can be carried out selectively on portions of the module or of the component.
Cette approche permet ainsi de libérer de la surface sur le substrat du module, et donc de limiter la surface que ce dernier occupe sur un circuit imprimé. Cela peut notamment permettre d'incorporer du blindage sur et dans l'enrobage, de l'interconnexion sur la surface d'enrobage, des composants enterrés dans l'enrobage, et/ou des composants montés en surface de l'enrobage.This approach thus makes it possible to free up the surface on the module substrate, and therefore to limit the surface that the latter occupies on a printed circuit. This can in particular make it possible to incorporate shielding on and into the coating, of the interconnection on the coating surface, components buried in the coating, and / or components mounted on the surface of the coating.
On notera que le titulaire de la présente demande de brevet a déjà présenté, dans le document de brevet FR-2 808 164, une technique consistant à rapporter une surface métallique sur l'intégralité d'un enrobage d'un composant, de façon à assurer le blindage de ce dernier. La présente invention repose sur une approche tout à fait différente, selon laquelle la surface métallique ne recouvre pas toute la surface de l'enrobage, mais est au contraire répartie sélectivement, de façon à conférer aux zones conductrices ainsi formées des fonctions spécifiques, notamment de connectique (pour permettre le report du module, et/ou pour recevoir des composants) ou encore pour former directement certains composants passifs.It will be noted that the owner of this patent application has already presented, in patent document FR-2 808 164, a technique consisting in attaching a metal surface to the entire coating of a component, so as to shield the latter. The present invention is based on an entirely different approach, according to which the metal surface does not cover the entire surface of the coating, but is instead selectively distributed, so as to confer on the conductive areas thus formed specific functions, in particular of connectors (to allow the module to be transferred, and / or to receive components) or to directly form certain passive components.
Ainsi, l'invention propose une nouvelle architecture en trois dimensions de boîtier pour modules électroniques, ou pour composants, avec un enrobage isolant et des métallisations sélectives permettant d'intégrer :Thus, the invention proposes a new architecture in three dimensions of housing for electronic modules, or for components, with an insulating coating and selective metallizations making it possible to integrate:
- une structure d'interconnexion, par exemple de type CMS ; un blindage électromagnétique, qui peut être sélectif ;an interconnection structure, for example of the CMS type; electromagnetic shielding, which can be selective;
- la réalisation de composants passifs ; - le report de composants sur le module, ailleurs que sur la surface du substrat de ce dernier. 6.2 Exemple de module selon l'invention- the production of passive components; - the transfer of components to the module, elsewhere than on the surface of the latter's substrate. 6.2 Example of a module according to the invention
Les figures 1 A et 1B illustrent un premier mode de réalisation d'un module selon l'invention, respectivement vu de dessous et de côté. On distingue le substrat 11 habituel, sur lequel ont été classiquement montés des composants. On a pu rapporter ces composants sur les deux faces. On a ensuite déposé sur chacune de ces faces 1 l'enrobage isolant 13. Cet enrobage peut recouvrir également un blindage. Sur la face inférieure (figure 1 A), et plus précisément sur la surface de l'enrobage, on a réalisé des zones conductrices 14, qui définissent une structure d'interconnexion.Figures 1A and 1B illustrate a first embodiment of a module according to the invention, respectively seen from below and from the side. We distinguish the usual substrate 11, on which components have conventionally been mounted. These components have been reported on both sides. The insulating coating 13 was then deposited on each of these faces 1. This coating can also cover a shield. On the underside (FIG. 1A), and more precisely on the surface of the coating, conductive zones 14 have been produced, which define an interconnection structure.
Chaque élément d'interconnexion peut être relié au substrat 11 (et plus précisément un composant porté par ce dernier) par une piste conductrice 15, qui se prolonge sur le bord latéral du boîtier (figure 1B). Sur la surface supérieure du module, on a en outre reporté en surface des composants 16 et 17, qui peuvent être reliés de la même façon au substrat, ou à l'aide d'éléments traversants prévus à cet effet. Ce module peut ainsi être directement rapporté sur un circuit imprimé 21, tel une carte d'application d'un client, ainsi que cela est illustré en figure 2. La liaison avec ce circuit 21 est assurée directement par les interconnexions 14 réalisées en surface de l'enrobage, sans qu'aucun interposeur ne soit nécessaire. On obtient ainsi un montage de type CMS très simple, et présentant une épaisseur réduite. La surface occupée est également limitée, du fait que certains composants 16 et 17 ne sont pas présents sur le substrat 11, mais rapportés en surface du boîtier. Comme déjà indiqué, ces composants pourraient également être sur une couche intermédiaire, elle-même recouverte à nouveau d'un enrobage, puis le cas échéant, de nouveaux composants.Each interconnection element can be connected to the substrate 11 (and more precisely a component carried by the latter) by a conductive track 15, which extends on the lateral edge of the housing (FIG. 1B). On the upper surface of the module, components 16 and 17 have also been transferred to the surface, which can be connected in the same way to the substrate, or by means of through elements provided for this purpose. This module can thus be directly attached to a printed circuit 21, such as a customer application card, as illustrated in FIG. 2. The connection with this circuit 21 is ensured directly by the interconnections 14 produced on the surface of coating, without the need for any interposers. A very simple CMS type assembly is thus obtained, and having a reduced thickness. The area occupied is also limited, because certain components 16 and 17 are not present on the substrate 11, but attached to the surface of the housing. As already indicated, these components could also be on an intermediate layer, itself again covered with a coating, then if necessary, new components.
6.3 Exemple de révocation d'un module selon Vinvention6.3 Example of revocation of a module according to the invention
Les figures 3A à 3F illustrent un exemple de fabrication d'un module selon la technique de l'invention.Figures 3A to 3F illustrate an example of manufacturing a module according to the technique of the invention.
Les étapes successives sont les suivantes : - figure 3 A : sur un substrat 31 sont rapportés classiquement des composants 32, preférentiellement répartis, de façon d'une part à optimiser l'utilisation de la surface, et d'autre part à regrouper les composants selon leur fonction, ou encore à éloigner les composants susceptibles de se perturber, par exemple du fait d'interférences. Dans le cas de l'exemple illustré, les composants sont regroupés en deux zones correspondant respectivement à la bande de base et à la radiofréquence d'un module de radiotéléphonie ;The successive steps are as follows: - Figure 3 A: on a substrate 31 are conventionally reported components 32, preferably distributed, so as on the one hand to optimize the use of the surface, and on the other hand to group the components according to their function, or even to move away the components likely to be disturbed, for example due to interference. In the case of the example illustrated, the components are grouped into two zones corresponding respectively to the baseband and to the radio frequency of a radiotelephony module;
- figure 3B : les deux groupes bande de base et RF reçoivent un isolant d'enrobage sélectif 33, 34, par exemple selon une technologie prévue de réalisation de boîtiers plastiques ; figure 3C : on métallisé (35) la surface de ces deux zones enrobées 33 et 34, par exemple par bain chimique ou peinture, de façon à assurer un blindage efficace et sélectif, pour chacune des fonctions. On notera que, ce blindage, connu en soi, présente l'avantage d'un coût réduit ne nécessitant pas l'achat et le montage de composants tels qu'une boîte métallique ;- Figure 3B: the two baseband and RF groups receive a selective coating insulator 33, 34, for example according to a technology provided for making plastic boxes; FIG. 3C: the surface of these two coated areas 33 and 34 is metallized (35), for example by chemical bath or painting, so as to ensure efficient and selective shielding, for each of the functions. It will be noted that this shielding, known per se, has the advantage of a reduced cost not requiring the purchase and assembly of components such as a metal box;
- figure 3D : un surmoulage plastique 36, est ensuite rapporté sur l'ensemble de la partie supérieure du module, de façon à former un boîtier ; figure 3E : selon l'invention, on applique une metallisation 37 sur la surface complète du boîtier surmoulé 36, par un traitement de surface adapté ;- Figure 3D: a plastic overmolding 36, is then attached to the entire upper part of the module, so as to form a housing; FIG. 3E: according to the invention, a metallization 37 is applied to the complete surface of the overmolded housing 36, by a suitable surface treatment;
- figure 3F : puis, on supprime une partie de la metallisation 37, de façon à définir les zones conductrices 38 correspondant, dans l'exemple illustré, aux pistes et pastilles d'une structure d'interconnexion, selon par exemple une technique de gravure en trois dimensions.- Figure 3F: then, part of the metallization 37 is removed, so as to define the conductive zones 38 corresponding, in the example illustrated, to the tracks and pads of an interconnection structure, according for example to an etching technique in three dimensions.
On notera que les étapes des figures 3E et 3F peuvent être remplacées par une étape unique de réalisation directe des zones conductrices souhaitées, par exemple par sérigraphie.It will be noted that the steps of FIGS. 3E and 3F can be replaced by a single step of direct production of the desired conductive areas, for example by screen printing.
Le coût de l'interconnexion est ainsi réduit, qui correspond seulement à un coût de process, sans nécessiter d'achat d'un connecteur. Par ailleurs, on note qu'il y a ainsi peu ou pas du tout de surface de substrat occupé par l'interconnexion. Bien sûr les coefficients d'expansion thermique du matériau isolant d'une part, et du matériau du circuit imprimé d'autre part, sont preférentiellement choisis de façon à présenter une bonne compatibilité lors du report du module pour obtenir une plus grande fiabilité de l'interconnexion. 6.4 Intégration de composants passifs dans V enrobageThe cost of interconnection is thus reduced, which only corresponds to a process cost, without the need to purchase a connector. Furthermore, it should be noted that there is thus little or no surface area of the substrate occupied by the interconnection. Of course the coefficients of thermal expansion of the insulating material on the one hand, and of the printed circuit material on the other hand, are preferably chosen so as to have good compatibility during the transfer of the module to obtain greater reliability of the interconnection. 6.4 Integration of passive components in the coating
La technique de l'invention permet par ailleurs d'intégrer efficacement et simplement des composants passifs dans l'enrobage, ainsi que cela est illustré par les figures 4A et 4B, dans le cas d'un effet capacitif. La figure 4A présente schématiquement les électrodes d'une capacité réalisée selon l'invention, et la figure 4B illustre le schéma électrique correspondant.The technique of the invention also makes it possible to efficiently and simply integrate passive components into the coating, as illustrated by FIGS. 4A and 4B, in the case of a capacitive effect. FIG. 4A schematically presents the electrodes of a capacity produced according to the invention, and FIG. 4B illustrates the corresponding electrical diagram.
La pastille 38 (figure 3F) n'est ainsi pas seulement un élément de connexion, mais également une électrode 41 d'une capacité 42, dont l'autre électrode 43 est formée par une zone conductrice interne, réalisée avant la dernière couche d'enrobage, et qui peut par exemple être un plan de masse (correspondant par exemple à un blindage interne).The pad 38 (FIG. 3F) is thus not only a connection element, but also an electrode 41 with a capacity 42, the other electrode 43 of which is formed by an internal conductive zone, produced before the last layer of coating, and which can for example be a ground plane (corresponding for example to an internal shielding).
On obtient ainsi un effet capacitif permettant par exemple une aide au découplage des entrées/sorties. Le coût de ces composants passifs est uniquement un coût process, sans achat de composants. En outre, ces composants n'occupent aucune surface sur le substrat du module. Le diélectrique de la capacité 43 est réalisé par l'enrobage isolant.There is thus obtained a capacitive effect allowing for example a decoupling aid of the inputs / outputs. The cost of these passive components is only a process cost, without the purchase of components. In addition, these components do not occupy any surface on the module substrate. The dielectric of the capacitor 43 is produced by the insulating coating.
Le choix des formes, des épaisseurs et des surfaces des matériaux isolants et conducteurs notamment, permet définir des capacités ou des inductances ou des résistances, ou des combinaisons de ces éléments.The choice of shapes, thicknesses and surfaces of insulating and conductive materials in particular, makes it possible to define capacitances or inductances or resistances, or combinations of these elements.
On peut également réaliser certains composants (ou portions de composants), par un choix adapté de la surface d'une zone conductrice. 6.5 Module à double faceIt is also possible to produce certain components (or portions of components), by a suitable choice of the surface of a conductive zone. 6.5 Double-sided module
Ainsi que cela est illustré sur la figure 5, la technique de l'invention permet encore d'optimiser la répartition des composants en montant certains d'entre eux sur au moins une des faces du module. Dans ce cas, les zones conductrices 51 sont des pistes électriques, permettant l'interconnexion des composants 52 et 53 montés en surface avec les autres composants du substrat 54. Il peut notamment s'agir de composants CMS 52, ou de composants câblés ("wire bonding" ou "ftip chip");As illustrated in FIG. 5, the technique of the invention also makes it possible to optimize the distribution of the components by mounting some of them on at least one of the faces of the module. In this case, the conductive areas 51 are electrical tracks, allowing the interconnection of the components 52 and 53 mounted on the surface with the other components of the substrate 54. They can in particular be SMD components 52, or wired components ("wire bonding" or "ftip chip");
On comprend que la technique de l'invention peut être itérative, et que le traitement illustré par les figures 3A à 3F peut être répété sur les composants 52 et 53 de la figure 5.It is understood that the technique of the invention can be iterative, and that the processing illustrated by FIGS. 3A to 3F can be repeated on the components 52 and 53 of FIG. 5.
La même approche pourrait également être mise en œuvre sur la surface inférieure du composant, notamment en prévoyant des logements 61, 62, comme illustré sur la figure 6, de façon que les composants 63, 64 ne dépassent pas de la surface.The same approach could also be implemented on the lower surface of the component, in particular by providing housings 61, 62, as illustrated in FIG. 6, so that the components 63, 64 do not protrude from the surface.
Dans l'exemple de la figure 6, on peut également prévoir que les logements 61, 62 seront recouverts d'un enrobage, et le cas échéant d'un blindage. é.6 Précisions sur la fabrication des modules ou composants selon l'invention L'invention permet donc de réaliser des modules électroniques, ou des composants, sous la forme d'un boîtier enrobé pourvu d'une série de un ou plusieurs enrobages de matériaux électriquement isolants intercalés entre un ou plusieurs dépôts de couches électriquement conductrices, dont la définition des formes géométriques en surface peuvent assurer simultanément au moins certaines des fonctions suivantes :In the example of FIG. 6, it can also be provided that the housings 61, 62 will be covered with a coating, and if necessary with a shield. é.6 Details on the manufacture of modules or components according to the invention The invention therefore makes it possible to produce electronic modules, or components, in the form of a coated housing provided with a series of one or more coatings of materials electrically insulating sandwiched between one or more deposits of electrically conductive layers, the definition of geometric shapes on the surface can simultaneously ensure at least some of the following functions:
- blindage de différentes régions indépendantes, avec une surface occupée réduite sur le substrat du module ;- shielding of different independent regions, with a reduced occupied surface on the substrate of the module;
- connexion par brasage sur une circuit imprimé sans occuper de surface sur le substrat du module ; - intégration de fonctions électriques équivalant à des éléments passifs, sans occuper le volume correspondant sur ou dans le substrat ;- connection by soldering on a printed circuit without occupying any surface on the module substrate; - integration of electrical functions equivalent to passive elements, without occupying the corresponding volume on or in the substrate;
- possibilité de report de composants sur l'enrobage du boîtier (et non sur le substrat du module, ou sur un autre emplacement du circuit imprimé). Le blindage électromagnétique de l'invention permet d'associer un blindage interne et un blindage externe d'une ou plusieurs régions du module, par la réalisation d'une enveloppe conductrice autour des composants de chacune des ces régions, selon le principe d'une cage de Faraday ramenée à la masse. Ce dépôt de couches conductrices peut notamment être réalisé par :- possibility of transferring components to the housing coating (and not to the module substrate, or to another location on the printed circuit). The electromagnetic shielding of the invention makes it possible to associate an internal shielding and an external shielding of one or more regions of the module, by the production of a conductive envelope around the components of each of these regions, according to the principle of a Faraday cage brought back to earth. This deposition of conductive layers can in particular be carried out by:
- pulvérisation d'éléments conducteurs ;- spraying of conductive elements;
- peinture conductrice ; attache d'éléments conducteurs par succession d'un ou plusieurs bains chimiques et/ou électrochimiques. L'enrobage isolant recevant cette couche est quant à lui avantageusement sélectif, dans le choix des matériaux, et pour épargner des surfaces du substrat définies de manière à présenter une continuité électrique entre le dépôt conducteur sur l'enrobage et la masse du substrat.- conductive paint; attachment of conductive elements by succession of one or more chemical and / or electrochemical baths. The insulating coating receiving this layer is advantageously selective, in the choice of materials, and in order to save defined surfaces of the substrate so as to present electrical continuity between the conductive deposit on the coating and the mass of the substrate.
Cet enrobage isolant peut par exemple être réalisé par : - coulée de matière et polymérisation ou frittage ;This insulating coating can for example be produced by: - material casting and polymerization or sintering;
- injection de matière et polymérisation ou frittage ;- material injection and polymerization or sintering;
- transfert de matière et polymérisation ou frittage.- material transfer and polymerization or sintering.
La structure d'interconnexion qui peut être réalisée sur un module électronique selon l'invention, associe des terminaisons conductrices pour l'interconnexion, sous la forme de pastilles de formes géométriques paramétrables, reliées par des pistes aux sorties signaux du substrat, elles-mêmes réparties sur la surface ou sur la tranche de ce dernier.The interconnection structure which can be produced on an electronic module according to the invention, associates conductive terminations for the interconnection, in the form of pads of configurable geometric shapes, connected by tracks to the signal outputs of the substrate, themselves distributed on the surface or on the edge of the latter.
Ces formes géométriques du dépôt conducteur sur la surface tridimensionnelle de l'enrobage isolant peuvent notamment être réalisées par : - gravure d'un dépôt conducteur initialement uniforme ;These geometric shapes of the conductive deposit on the three-dimensional surface of the insulating coating can in particular be produced by: - etching of an initially uniform conductive deposit;
- attaque chimique d'un dépôt conducteur initialement uniforme ;- chemical attack on an initially uniform conductive deposit;
- dépôt sélectif par pochoir d'une surface conductrice ;- selective deposition by stencil of a conductive surface;
- dépôt sélectif de matière conductrice par affinité chimique ou électrochimique avec les matériaux isolants de l'enrobage sur lequel ledit dépôt est effectué. Selon l'invention, on peut réaliser des fonctions électriques de schémas équivalents passifs, en associant par exemple les réalisations de plans masse conducteurs et de surfaces conductrices de formes géométriquement paramétrables de façon que ces éléments soient séparés par des matériaux isolants, et que le choix des : caractéristiques électriques des matériaux isolants et conducteurs ;- selective deposition of conductive material by chemical or electrochemical affinity with the insulating materials of the coating on which said deposition is carried out. According to the invention, it is possible to perform electrical functions of equivalent passive diagrams, by associating for example the embodiments of conductive ground planes and conductive surfaces of geometrically configurable shapes so that these elements are separated by insulating materials, and that the choice of: electrical characteristics of insulating and conductive materials;
- épaisseurs de dépôt des matériaux isolants et conducteurs ;- deposition thicknesses of insulating and conductive materials;
- formes et tailles des surfaces conductrices obtenues, permettent d'obtenir des fonctions électriques telles que des capacitances, des inductances, des résistances, et des circuits équivalents à l'association de ces composants passifs.- shapes and sizes of the conductive surfaces obtained, make it possible to obtain electrical functions such as capacitances, inductances, resistances, and circuits equivalent to the association of these passive components.
Comme déjà indiqué, un module ou un composant selon l'invention peut mettre en œuvre plusieurs itérations de dépôt de matières électriquement conductrices et isolantes, de façon à recevoir encore plus d'éléments ou de fonctions. En outre, des composants montés en surface par brasure ou par collage peuvent être reportés sur des empreintes conductrices réalisées sur la surface final du module.As already indicated, a module or a component according to the invention can implement several iterations of depositing electrically conductive and insulating materials, so as to receive even more elements or functions. In addition, components mounted on the surface by soldering or gluing can be transferred onto conductive imprints made on the final surface of the module.
Il est souhaitable que le matériau isolant pour l'enrobage supportant l'interconnexion conductrice soit choisi de façon qu'il présente un coefficient d'expansion thermique compatible avec celui du matériau du circuit imprimé sur lequel il sera reporté.It is desirable that the insulating material for the coating supporting the conductive interconnection is chosen so that it has a coefficient of thermal expansion compatible with that of the material of the printed circuit on which it will be transferred.
Avantageusement on peut prévoir en outre que l'on rapporte un film par exemple de matière organique photosensible sur la surface au-dessus de l'emobage et du dépôt métallique, de façon à assurer une protection de surface et d'épargne des zones définies pour l'assemblage des composants.Advantageously, provision may also be made for a film, for example of photosensitive organic material, to be brought back to the surface above the covering and the metal deposit, so as to provide surface protection and protection of the areas defined for assembly of components.
Pour permettre une interconnexion dans le volume de l'enrobage, entre plusieurs couches conductrices successives séparées par des couches isolantes, on réalise avantageusement un ou plusieurs trous par exemple cylindriques ou coniques, dans les couches isolantes, et qui seront remplies de matériaux conducteurs.To allow an interconnection in the volume of the coating, between several successive conductive layers separated by insulating layers, one or more holes are advantageously made, for example cylindrical or conical, in the insulating layers, and which will be filled with conductive materials.
Ces interconnexions dans le volume de l'enrobage sont par exemple obtenues par : - perçage mécanique ou laser ; attaque chimique ou tous procédés d'enlèvement de matière ;These interconnections in the volume of the coating are for example obtained by: - mechanical or laser drilling; chemical attack or any material removal process;
- moulage mécanique à l'enrobage, ou tous procédés épargnant l'arrivée de matière à l'enrobage dans un volume prédéfini.- mechanical molding for coating, or any process sparing the arrival of material for coating in a predefined volume.
Le dépôt de matière conductrice dans ces trous peut notamment être effectué par : sérigraphie ou remplissage sous pression ;The deposition of conductive material in these holes can in particular be carried out by: screen printing or filling under pressure;
- bains chimiques et/ou électrolytiques ; suivi de l'enlèvement de matière conductrice en excès. On peut également prévoir de réaliser des drains thermiques, pour évacuer la chaleur produite par certains composants enrobés, ou montés en surface du module. Ces éléments électriquement conducteurs permettent de dissiper la chaleur vers l'extérieur du module.- chemical and / or electrolytic baths; followed by removal of excess conductive material. It is also possible to provide thermal drains, to evacuate the heat produced by certain coated components, or mounted on the surface of the module. These electrically conductive elements dissipate the heat to the outside of the module.
Les interconnexions dans le volume peuvent être utilisées pour connecter les composants sources de chaleur vers des plans de masse, ces derniers étant connectés ensuite au circuit imprimé.The interconnections in the volume can be used to connect the heat source components to ground planes, the latter then being connected to the printed circuit.
Les éléments électriquement isolants peuvent également être choisis pour être thermiquement conducteurs, notamment lorsqu'ils enrobent des composants sources de chaleur, de manière à dissiper cette chaleur vers l'extérieur, et par exemple vers des radiateurs. The electrically insulating elements can also be chosen to be thermally conductive, in particular when they coat heat source components, so as to dissipate this heat towards the outside, and for example towards radiators.

Claims

REVENDICATIONS
1. Procédé de fabrication d'un composant ou d'un module regroupant dans un boîtier prêt à monter sur circuit imprimé un ensemble de composants montés sur un substrat, caractérisé en ce qu'il comprend au moins une étape d'enrobage à l'aide d'un matériau isolant d'au moins une partie dudit module et au moins une étape de réalisation, sur une partie dudit matériau isolant, d'au moins une zone conductrice, de façon à définir des zones formant et/ou pouvant recevoir au moins une partie d'un composant et/ou au moins un élément d'interconnexion.1. Method for manufacturing a component or a module grouping together in a box ready to mount on a printed circuit a set of components mounted on a substrate, characterized in that it comprises at least one step of coating with using an insulating material from at least part of said module and at least one step of producing, on a part of said insulating material, at least one conductive zone, so as to define zones forming and / or capable of receiving at at least part of a component and / or at least one interconnection element.
2. Procédé selon la revendication 1, caractérisé en ce qu'au moins une desdites zones conductrices définit une structure d'interconnexion, permettant de rapporter ledit module sur un circuit imprimé.2. Method according to claim 1, characterized in that at least one of said conductive zones defines an interconnection structure, making it possible to attach said module to a printed circuit.
3. Procédé selon la revendication 2, caractérisé en ce que ladite structure d'interconnexion présente au moins un point de connexion, et au moins une liaison correspondante, se prolongeant sur au moins un bord latéral dudit boîtier jusqu' audit substrat.3. Method according to claim 2, characterized in that said interconnection structure has at least one connection point, and at least one corresponding link, extending over at least one lateral edge of said housing to said substrate.
4. Procédé selon l'une quelconque des revendications 2 et 3, caractérisé en ce que ladite structure d'interconnexion permet un montage sur un circuit imprimé par brasage.4. Method according to any one of claims 2 and 3, characterized in that said interconnection structure allows mounting on a printed circuit by soldering.
5. Procédé selon la revendication 4, caractérisé en ce que ladite structure d'interconnexion permet un montage sur un circuit imprimé selon la technique CMS.5. Method according to claim 4, characterized in that said interconnection structure allows mounting on a printed circuit according to the CMS technique.
6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'au moins une desdites zones conductrices définit un composant passif.6. Method according to any one of claims 1 to 5, characterized in that at least one of said conductive zones defines a passive component.
7. Procédé selon la revendication 6, caractérisé en ce que le ou lesdits composants passifs appartiennent au groupe comprenant les capacités, les inductances et les résistances, et leurs combinaisons.7. Method according to claim 6, characterized in that the said passive component or components belong to the group comprising the capacitors, the inductors and the resistors, and their combinations.
8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'au moins une desdites zones conductrices est une électrode d'une capacité dont le diélectrique est formé par ledit matériau isolant.8. Method according to any one of claims 1 to 7, characterized in that at least one of said conductive areas is an electrode with a capacity of which the dielectric is formed by said insulating material.
9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il comprend au moins deux zones conductrices conçues pour recevoir au moins un composant. 9. Method according to any one of claims 1 to 8, characterized in that it comprises at least two conductive zones designed to receive at least one component.
10. Procédé selon la revendication 9, caractérisé en ce que le ou lesdits composants sont montés par brasure ou par collage.10. Method according to claim 9, characterized in that the said component or components are mounted by soldering or by gluing.
11. Procédé selon l'une quelconque des revendications 1 à 10, caractérisé en ce qu'il comprend une étape d'enrobage préalable d'au moins une partie desdits composants, et une étape de metallisation de la partie enrobée, afin d'assurer un blindage électro-magnétique, puis une étape d'enrobage final.11. Method according to any one of claims 1 to 10, characterized in that it comprises a step of prior coating of at least part of said components, and a step of metallization of the coated part, in order to ensure electro-magnetic shielding, then a final coating step.
12. Procédé selon la revendication 11, caractérisé en ce que ladite étape d'enrobage final est réalisée par surmoulage.12. Method according to claim 11, characterized in that said final coating step is carried out by overmolding.
13. Procédé selon l'une quelconque des revendications 11 et 12, caractérisé en ce que l'on effectue un blindage indépendant d'au moins deux sous-ensembles de composants.13. Method according to any one of claims 11 and 12, characterized in that one carries out an independent shielding of at least two subsets of components.
14. Procédé selon la revendication 13, caractérisé en ce qu'au moins un desdits sous-ensembles est relié à un radiateur externe.14. Method according to claim 13, characterized in that at least one of said sub-assemblies is connected to an external radiator.
15. Procédé selon l'une quelconque des revendications 1 à 14, caractérisé en ce que lesdites étapes d'enrobage et de réalisation d'au moins une zone conductrice sont réitérées au moins une fois.15. Method according to any one of claims 1 to 14, characterized in that said steps of coating and producing at least one conductive zone are repeated at least once.
16. Procédé selon l'une quelconque des revendications 1 à 15, caractérisé en ce qu'il comprend le dépôt d'une couche de metallisation formant plan de masse.16. Method according to any one of claims 1 to 15, characterized in that it comprises the deposition of a metallization layer forming a ground plane.
17. Procédé selon l'une quelconque des revendications 1 à 16, caractérisé en ce qu'on réalise au moins une ouverture remplie d'un matériau conducteur traversant au moins une couche d'enrobage.17. Method according to any one of claims 1 to 16, characterized in that at least one opening is made filled with a conductive material passing through at least one coating layer.
18. Procédé selon la revendication 17, caractérisé en ce que la ou lesdites ouvertures sont coniques ou tronconiques.18. The method of claim 17, characterized in that the or said openings are conical or frustoconical.
19. Procédé selon l'une quelconque des revendications 17 et 18, caractérisé en ce que la ou lesdites ouvertures sont réalisées par perçage mécanique, perçage laser, attaque chimique ou moulage de l'enrobage. 19. Method according to any one of claims 17 and 18, characterized in that the or said openings are made by mechanical drilling, laser drilling, chemical attack or molding of the coating.
20. Procédé selon l'une quelconque des revendications 17 à 19, caractérisé en ce que la ou lesdites ouvertures sont remplies d'un matériau conducteur par sérigraphie ou remplissage sous pression, bains chimiques et/ou électrochimiques.20. Method according to any one of claims 17 to 19, characterized in that the or said openings are filled with a conductive material by screen printing or filling under pressure, chemical and / or electrochemical baths.
21. Procédé selon l'une quelconque des revendications 1 à 20, caractérisé en ce que ledit matériau isolant est un matériau plastique.21. Method according to any one of claims 1 to 20, characterized in that said insulating material is a plastic material.
22. Procédé selon l'une quelconque des revendications 1 à 21, caractérisé en ce que ledit matériau isolant présente un coefficient d'expansion thermique choisi de façon qu'il soit compatible avec celui du matériau de circuit imprimé sur lequel ledit composant ou module sera rapporté. 22. Method according to any one of claims 1 to 21, characterized in that said insulating material has a coefficient of thermal expansion chosen so that it is compatible with that of the printed circuit material on which said component or module will be reported.
23. Procédé selon l'une quelconque des revendications 1 à 22, caractérisé en ce que ladite étape d'enrobage est sélective, de façon à épargner au moins une portion de surface dudit substrat, de façon à présenter une continuité électrique entre au moins une desdites zones conductrices et au moins une desdites portions de surface. 23. Method according to any one of claims 1 to 22, characterized in that said coating step is selective, so as to spare at least a portion of surface of said substrate, so as to present an electrical continuity between at least one said conductive areas and at least one of said surface portions.
24. Procédé selon l'une quelconque des revendications 1 à 23, caractérisé en ce que ladite étape d'enrobage est réalisée par coulée de matière, injection de matière ou transfert de matière, puis polymérisation ou frittage.24. Method according to any one of claims 1 to 23, characterized in that said coating step is carried out by casting material, injection of material or transfer of material, then polymerization or sintering.
25. Procédé selon l'une quelconque des revendications 1 à 24, caractérisé en ce que ladite étape de réalisation d'au moins une zone conductrice comprend une étape de metallisation de la surface dudit matériau isolant et une étape de réalisation de formes géométriques permettant de supprimer une partie de ladite metallisation.25. Method according to any one of claims 1 to 24, characterized in that said step of producing at least one conductive zone comprises a step of metallizing the surface of said insulating material and a step of producing geometric shapes making it possible to remove part of said metallization.
26. Procédé selon la revendication 25, caractérisé en ce que ladite étape de metallisation comprend un traitement de surface par au moins un bain chimique et/ou électrochimique, peinture conductrice, pulvérisation d'éléments conducteurs et/ou vaporisation sous vide.26. The method of claim 25, characterized in that said metallization step comprises a surface treatment with at least one chemical and / or electrochemical bath, conductive paint, spraying of conductive elements and / or vaporization under vacuum.
27. Procédé selon l'une quelconque des revendications 25 et 26, caractérisé en ce que ladite étape de réalisation de formes géométriques comprend une gravure en trois dimensions par laser ou par révélation sélective (« MID » : « Molded Interconnection Device ») ou une attaque chimique. 27. Method according to any one of claims 25 and 26, characterized in that said step of producing geometric shapes comprises a three-dimensional etching by laser or by selective revelation ("MID": "Molded Interconnection Device") or a chemical attack.
28. Procédé selon l'une quelconque des revendications 1 à 27, caractérisé en ce qu'il comprend une étape de dépôt d'un film en matière organique photosensible sur ledit enrobage et la ou lesdites zones conductrices.28. Method according to any one of claims 1 to 27, characterized in that it comprises a step of depositing a film of photosensitive organic material on said coating and said conductive zone (s).
29. Procédé selon l'une quelconque des revendications 1 à 28, caractérisé en ce qu'il comprend une étape de réalisation d'au moins un drain thermique pour aider à l'évacuation de la chaleur produite par au moins un desdits composants.29. Method according to any one of claims 1 to 28, characterized in that it comprises a step of producing at least one heat sink to assist in the evacuation of the heat produced by at least one of said components.
30. Composant ou module regroupant dans un boîtier prêt à monter sur circuit imprimé un ensemble de composants montés sur un substrat, caractérisé en ce qu'il comprend un matériau isolant enrobant au moins une partie dudit module et au moins une zone conductrice sur une partie dudit matériau isolant, de façon à définir des zones formant et/ou pouvant recevoir au moins une partie d 'un composant et/ou au moins un élément d'interconnexion.30. Component or module grouping in a box ready to mount on printed circuit a set of components mounted on a substrate, characterized in that it comprises an insulating material coating at least a part of said module and at least one conductive zone on a part of said insulating material, so as to define zones forming and / or capable of receiving at least part of a component and / or at least one interconnection element.
31. Composant ou module selon la revendication 30, caractérisé en ce qu'au moins une desdites zones conductrices définit une structure d'interconnexion, permettant de rapporter ledit module sur un circuit imprimé.31. Component or module according to claim 30, characterized in that at least one of said conductive zones defines an interconnection structure, making it possible to attach said module to a printed circuit.
32. Composant ou module selon l'une quelconque des revendications 30 et 31, caractérisé en ce qu'il comprend au moins un composant passif défini par au moins desdites zones conductrices.32. Component or module according to any one of claims 30 and 31, characterized in that it comprises at least one passive component defined by at least said conductive zones.
33. Composant ou module selon l'une quelconque des revendications 30 à 32, caractérisé en ce qu'il comprend au moins une capacité dont le diélectrique est formé par ledit matériau isolant, et au moins une électrode par une desdites zones conductrices.33. Component or module according to any one of claims 30 to 32, characterized in that it comprises at least one capacitor, the dielectric of which is formed by said insulating material, and at least one electrode by one of said conductive zones.
34. Composant ou module selon l'une quelconque des revendications 30 à 33, caractérisé en ce qu'il porte au moins un composant connecté à au moins deux desdites zones conductrices. 34. Component or module according to any one of claims 30 to 33, characterized in that it carries at least one component connected to at least two of said conductive zones.
EP04716631A 2003-03-03 2004-03-03 Method for producing an electronic component or module and a corresponding component or module Withdrawn EP1599903A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0302588A FR2852190B1 (en) 2003-03-03 2003-03-03 METHOD FOR MANUFACTURING AN ELECTRONIC COMPONENT OR MODULE AND CORRESPONDING COMPONENT OR MODULE
FR0302588 2003-03-03
PCT/FR2004/000505 WO2004082022A2 (en) 2003-03-03 2004-03-03 Method for producing an electronic component or module and a corresponding component or module

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EP1599903A2 true EP1599903A2 (en) 2005-11-30

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EP (1) EP1599903A2 (en)
JP (1) JP2006519502A (en)
KR (1) KR20050105507A (en)
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FR (1) FR2852190B1 (en)
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RU2005126975A (en) 2006-05-27
FR2852190A1 (en) 2004-09-10
KR20050105507A (en) 2005-11-04
CN1846306A (en) 2006-10-11
US20070041163A1 (en) 2007-02-22
WO2004082022A3 (en) 2005-09-15
JP2006519502A (en) 2006-08-24
FR2852190B1 (en) 2005-09-23
WO2004082022A2 (en) 2004-09-23

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