EP2936556A1 - Module électronique contenant un circuit électronique enrobé de matière plastique et procédé pour le fabriquer - Google Patents

Module électronique contenant un circuit électronique enrobé de matière plastique et procédé pour le fabriquer

Info

Publication number
EP2936556A1
EP2936556A1 EP13805754.2A EP13805754A EP2936556A1 EP 2936556 A1 EP2936556 A1 EP 2936556A1 EP 13805754 A EP13805754 A EP 13805754A EP 2936556 A1 EP2936556 A1 EP 2936556A1
Authority
EP
European Patent Office
Prior art keywords
electronic
plastic
circuit
heat sink
electronic module
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Withdrawn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
EP13805754.2A
Other languages
German (de)
English (en)
Inventor
Martin Steinau
Thomas Schmidt
Bernhard Schuch
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.)
Conti Temic Microelectronic GmbH
Original Assignee
Conti Temic Microelectronic GmbH
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 Conti Temic Microelectronic GmbH filed Critical Conti Temic Microelectronic GmbH
Publication of EP2936556A1 publication Critical patent/EP2936556A1/fr
Withdrawn legal-status Critical Current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
    • H05K3/22—Secondary treatment of printed circuits
    • H05K3/28—Applying non-metallic protective coatings
    • H05K3/284—Applying non-metallic protective coatings for encapsulating mounted components
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
    • H01L23/433—Auxiliary members in containers characterised by their shape, e.g. pistons
    • H01L23/4334—Auxiliary members in encapsulations
    • 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
    • H01L23/495—Lead-frames or other flat leads
    • H01L23/49517—Additional leads
    • H01L23/49531—Additional leads the additional leads being a wiring board
    • 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
    • H05K3/0058—Laminating printed circuit boards onto other substrates, e.g. metallic substrates
    • H05K3/0061—Laminating printed circuit boards onto other substrates, e.g. metallic substrates onto a metallic substrate, e.g. a heat sink
    • 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
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/0026—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
    • H05K5/0082—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units specially adapted for transmission control units, e.g. gearbox controllers
    • 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
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20845—Modifications to facilitate cooling, ventilating, or heating for automotive electronic casings
    • H05K7/20854—Heat transfer by conduction from internal heat source to heat radiating structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—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
    • H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
    • H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
    • H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
    • H01L2224/321—Disposition
    • H01L2224/32151—Disposition the layer connector 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
    • H01L2224/32221—Disposition the layer connector 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
    • H01L2224/32245—Disposition the layer connector 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 metallic
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10227—Other objects, e.g. metallic pieces
    • H05K2201/1034—Edge terminals, i.e. separate pieces of metal attached to the edge of the printed circuit board [PCB]
    • 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
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/13—Moulding and encapsulation; Deposition techniques; Protective layers
    • H05K2203/1305—Moulding and encapsulation
    • H05K2203/1316—Moulded encapsulation of mounted components
    • 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
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/13—Moulding and encapsulation; Deposition techniques; Protective layers
    • H05K2203/1305—Moulding and encapsulation
    • H05K2203/1327—Moulding over PCB locally or completely
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
    • Y10T29/49147—Assembling terminal to base

Definitions

  • the invention relates to an electronic module with a plastic covered
  • gearbox control units form a very compact unit as a local control unit.
  • this arrangement Compared to the conventional use of external control devices, this arrangement has enormous advantages in terms of quality, cost, weight and functionality. In particular, this results in a significant reduction of connectors and lines, and thus of possible causes of failure.
  • control unit in the transmission makes high demands, especially on its thermal and mechanical strength.
  • the functionality must be ensured over a wide temperature range (about -40 ° C to 150 ° C) as well as extreme mechanical vibrations (up to 40g). Since the control unit is surrounded by highly viscous and chemically aggressive gear oil, high demands are placed on the oil-tightness of the control unit.
  • the control unit comprises two oil-tightly interconnected housing parts, through which an electrical connection element is passed, wherein the connection element connects the circuit carrier in the housing with electrical components outside the housing.
  • US2008 / 0170372 AI describes a control device with a circuit board, are arranged on the electronic components, and an electrical connection element to Connecting the circuit carrier to its periphery.
  • the circuit carrier is arranged on a base plate, which serves as a heat sink and dissipates the heat from the circuit substrate.
  • the circuit carrier, the connecting element and the base plate are surrounded with a plastic in such a way that the circuit carrier is completely enclosed with its components, but most of the back of the base plate and the outer ends of the electrical connection element are free of plastic.
  • This control unit can be mounted without a housing as a local control unit, for example in a transmission.
  • the surfaces of the circuit carrier and the base plate are at least partially roughened. This surface roughness ensures that the enclosing plastic is better interlocked with the surfaces of the circuit carrier and the base plate than on smooth surfaces. This is intended to prevent components of the control device, in particular the connection of the electrical component, from becoming unstable during temperature fluctuations due to the different coefficients of expansion of the involved components
  • Circuit board is destroyed, or that the plastic gets cracks or dissolves from the circuit board or the base plate, and thus, for example, oil from the transmission can penetrate to the circuit board and this damaged.
  • Microcontroller is generated on the circuit carrier.
  • a disadvantage of using a ceramic circuit board is above all the high price, which is much higher than that of an organic circuit board.
  • Another disadvantage of the described arrangement is that the production of the rough surface both during
  • Circuit carrier as well as the base plate each represents an additional step, which increases the overall cost of the control unit.
  • the use of a ceramic circuit board as a circuit carrier has the further disadvantage that the selection of the electrical components that can be mounted on it, is limited. In particular, either only power components such as power transistors can be arranged as switching elements on the ceramic circuit carrier, or it can only produce signal or signal processing
  • Components such as microprocessors are installed.
  • DE 100 13 255 A1 is a resin-encapsulated electronic
  • WO 2011/072629 Al describes a so-called HDI (High Density Interconnect) - circuit board for use in a housing of a local control unit in a motor vehicle.
  • HDI circuit boards are special organic multilayer printed circuit boards, which are characterized by a good heat dissipation from the top PCB layer on which, for example, a heat-generating active component is arranged, to the lowest printed circuit board layer, which is thermally conductively connected to a heat sink, our own HDI] registration.
  • An HDI circuit carrier has vertical vias from one circuit board layer to the next, which have both an electrically, as well as a thermally conductive function. These vias are referred to as Vertical Interconnect Access, hereinafter referred to as Via. Vias, which are formed as plated through holes with a diameter smaller than about 150 ⁇ , are also referred to as microvias. Due to the small diameter of the microvias, a relatively large number of contacts on a relatively small area of the circuit substrate is possible, making this kind of
  • Circuit board is predestined for the assembly of unhoused Halbeiterbausteinen, so-called. Bare Dies, which naturally have a much closer contact spacing, as components with housing.
  • the core of the invention is that at least one organic so-called HDI circuit carrier with an electronic circuit comprising at least one electronic component, is thermally conductively connected to a heat sink and the electronic circuit and the heat sink are coated with plastic such that only the circuit carrier opposite rear side of the heat sink at least partially, and at least the contact ends of the conductor structures, which are used for electrical connection with the electrical components outside of the electronic module, are free of plastic.
  • Conductor structures with plastic in particular a thermosetting polymer, such as silicone, epoxy silicone, epoxy or phenolic resin allows the same protection against harmful environmental influences in the suburbs environment as an expensive housing.
  • the conductor structures for the electrical connection of the electronic circuit with the electrical components outside the electronic module need not be sealed separately as in a control unit with housing and the plastic-free back of the heat sink can be mounted for optimal heat dissipation to a part of the transmission, prevail at the lower temperatures ,
  • the different coefficients of thermal expansion, in particular of the plastic, of the circuit carrier, of the conductor structures and of the heat sink are ideally matched to one another such that they are in the direct comparison of the order of +/- 15%, so that temperature fluctuations within the range
  • Operating temperature range of about -40 ° C to 150 ° C, for example, does not cause cracks in the plastic itself or the plastic from the circuit board or the
  • a signal-generating or processing device such as an unhoused microprocessor with very close contact distances and comparatively low operating currents, simultaneously.
  • the plate of the heat sink may also have a gradation, in particular on the edge of the plate.
  • the gradation increases the contact area between the plate and the enveloping plastic and thus the creepage path for any liquids and gases that may penetrate into the electronics module.
  • the Kriechwegverinrung can be carried out both by the gradation in the cross section of the heat sink and as an undercut, in the targeted plastic can penetrate, the undercut is arranged in particular so that it is optimally adapted to the shape of the plastic filling behavior to avoid air pockets. Both creep extension measures can also occur in combination.
  • the stamped grid or the flex foil can be soldered, welded or glued directly onto the circuit carrier, for example.
  • the electrical connection can also indirectly, for example by means of a bonding wire between the circuit carrier and
  • Ladder structure are produced. Punching grid and PCB are mainly used in simple structured environments of the electronic module, the more expensive flexible film conductors can be adapted to more complex environments.
  • the mechanical connection between the circuit carrier of the conductor structure is usually material or non-positive. This function can be carried out in particular as described above in connection with the electrical connection, by soldering, welding or gluing, or sintering, sinter bonding.
  • Glass transition point of the plastic preferably at least equal to or greater than that of the circuit substrate.
  • the glass transition point of a material is a measure of the maximum permissible operating temperature, in particular for carbon-based thermosets. In particular, the thermal expansion coefficient of the material increases from the glass transition temperature four to five times, which would have negative effects on the structure of the electronic module.
  • the glass transition temperature of the enveloping polymer is above the operating temperature of the electronics. Since the change in the CTE during the thermal cycle can lead to delamination on the circuit carrier.
  • the circuit carrier is connected to the heat sink in particular by means of a thermally conductive adhesive material, eg by means of a filled with inorganic particles
  • Another object of the invention is a method for producing a with
  • Plastic coated electronic module for use as a control unit in one
  • Electronic modules are initially provided with the following components:
  • an organic HDI circuit carrier suitable for a bare assembly, that is to say for the assembly of unhoused components, with at least one electronic component,
  • At least one electrically conductive conductor structure for electrically connecting the electronic circuit to electrical components outside the electronic module
  • At least one stamped grid, another printed circuit board or a flexible foil conductor or a combination thereof may be used as electrically conductive conductor structures.
  • the punched grid or the Flexfolie on the one hand directly on the
  • Circuit carrier for example, soldered, welded or glued.
  • These Direct electrically conductive connection is usually also used as a mechanical connection between the electronic circuit and the conductor structure.
  • connection can also indirectly, for example by means of a bonding wire, for example, gold, silver or copper between circuit carrier and
  • the circuit carrier is thermally conductively connected to the heat sink. This is advantageously carried out by means of a thermally conductive
  • Adhesive material eg. B. a thermal adhesive.
  • the order of the last two steps is arbitrary.
  • the plastic is preferably a thermosetting polymer such as silicone, epoxysilicone, epoxy or
  • Phenolic resin which may be filled with inorganic particles.
  • the electronic circuit and the heat sink are coated with plastic such that only the rear side of the heat sink opposite the circuit carrier is at least partially free of plastic.
  • the free surface of the back of the heat sink is then the dissipation of heat from the electronic module available.
  • transfer molding or else transfer molding
  • plastic is pressed into the injection mold and cured under heat and pressure.
  • This method offers over other methods, e.g. Compression molding the possibility also electronics with complex
  • thermoset injection molding injection molding
  • FIG. 1 shows an electronic module with a heat sink and a direct connection between the circuit carrier and the conductor structure
  • FIG. 2 shows an electronic module as in FIG. 1 with a heat sink with a graduation
  • FIG. 3 shows an electronic module as in FIG. 1 with a heat sink with a gradation and an undercut
  • Fig. 5 is an electronic module with a gradation on the heat sink and a bonding wire
  • FIG. 1 shows an electronic module for use as a control unit in a motor vehicle, with an electronic circuit 1 covered with plastic 2, which is arranged on a heat sink 3.
  • the electronic circuit 1 comprises an organic HDI (High Density Interconnect) circuit carrier 5, on which electronic components 4, 7 are mounted.
  • organic HDI High Density Interconnect
  • An HDI board 5 is a special multi-layer board.
  • the printed circuit board layers each have at least one on the electrically insulating base material
  • Glass fiber reinforced plastic applied heat conducting layer in particular of copper, on.
  • Several vias are provided in the z direction perpendicular to the printed circuit board layers.
  • Via Vertical Interconnect Access
  • layer changer a vertical via is referred to, which electrically and thermally connects at least two printed circuit board layers of a multilayer printed circuit board 5.
  • blind via a via is referred to, which is formed as a blind hole with a via, which connects in particular the uppermost or lowermost circuit board layer with at least one inner circuit board layer of a multilayer printed circuit board 5.
  • a via is referred to, which is arranged inside a multilayer printed circuit board 5, and connects at least two inner PCB layers.
  • Vias which are formed as plated through holes with a diameter smaller than about 150 ⁇ , are also referred to as microvias.
  • Vias which primarily serve to improve the heat transfer through a printed circuit board 5, are also referred to as thermal vias.
  • the vias connect the heat conducting layers of different printed circuit board layers in such a way that the vias and the heat conducting layers of the printed circuit board layers form a heat conducting bridge from the uppermost printed circuit board layer to the lowest printed circuit board layer.
  • the heat conducting layers simultaneously serve as electrical conductors.
  • an entire surface of all heat conducting layers is at least one
  • Circuit board location greater than a total surface area of all the heat conducting layers above it lying circuit board position.
  • the heat conduction bridge formed by the vias and heat conducting layers is thereby widened by at least one printed circuit board layer to an underlying printed circuit board layer, since the total surface area of all heat conducting layers of at least one printed circuit board layer is greater than an overall surface of all heat conducting layers of an overlying printed circuit board layer.
  • the surface effective for the heat transport is advantageously increased and the thermal resistance of the entire printed circuit board 5 is reduced, since the thermal resistance is at least approximately proportional to the reciprocal of the surface effective for the heat transfer.
  • the uppermost circuit board layer is at least partially connected to at least the inner circuit board layer next to the circuit board layers in the z-direction, with blind vias formed as microvias of small diameter.
  • blind vias formed as microvias of small diameter.
  • nickel, palladium and gold applied.
  • connection techniques for assembling the printed circuit board 5 with unhoused components 4 together with housed components 4 are possible.
  • the additional metallization is applied to the outer copper surface of the heat conducting layers, wherein the additional metallization simultaneously for assembly processes, in particular by means of soldering, Silberleitkleben etc. for unhoused active components 4 and
  • connection techniques such. B. wire bonding with gold wire and / or aluminum wire in particular for cased passive components 7, is suitable.
  • the heat conducting layers of the printed circuit board layers and the walls of the vias are coated with copper and additionally with a multifunctional one
  • NiPdAu Metallization of NiPdAu provided. This also contributes to the fact that the Current carrying capacity of this HDI board 5 up to 50 A and more. The maximum ampacity of thick-film ceramic PCBs, however, is about 25 A.
  • the thermal expansion coefficient CTE of a circuit carrier such as the HDI printed circuit board 5 is in the range of 18 - 20 ppm / ° C.
  • the copper CTE is 16 ppm / ° C and that of aluminum is 23 ppm / ° C.
  • Heat sink material for a ceramic circuit board with 5-7 ppm / ° C is suitable, have copper and aluminum compared to iron also has the advantage that their thermal
  • Thermal conductivity of 200 W / mK for aluminum and 400 W / mK for copper is 3-5 times higher than that of iron, which is 70 W / mK.
  • the conductor structure 6 can in particular as a stamped grid made of copper, with a CTE of 16 ppm / ° C, as an additional printed circuit board made of glass fiber reinforced plastic with a CTE of 18-20 ppm / ° C or a flexible film conductor of a composite of a polyimide and a Copper foil with a CTE in the range 16-18 ppm / ° C be executed.
  • a stamped grid made of copper with a CTE of 16 ppm / ° C
  • an additional printed circuit board made of glass fiber reinforced plastic with a CTE of 18-20 ppm / ° C or a flexible film conductor of a composite of a polyimide and a Copper foil with a CTE in the range 16-18 ppm / ° C be executed.
  • Conductor structure 6 is connected directly to the circuit carrier 5 in FIG. 1. This connection can be made by welding, soldering or gluing and has both the function of an electrical and a mechanical connection.
  • the enveloping plastic 2 consists in particular of a thermosetting polymer, such as silicone, epoxy silicone, epoxy resin or phenolic resin.
  • the CTE of these materials is here in the range of 14-19 ppm / ° C, whereby the range can be adjusted by different admixtures of the inorganic fillers, eg Si0 2 .
  • plastic materials are thus suitable because of their CTE, the circuit substrate 3, the conductor structure 6 and at least a part of the heat sink 3 to be wrapped so that it does not come to cracks in the plastic 2 itself with temperature fluctuations or the plastic 2 from the circuit substrate 5 or the heat sink 3 dissolves.
  • a thermoplastic polymer it would also be conceivable to use a thermoplastic polymer.
  • the cover with plastic 2 allows the same protection against harmful
  • the operating temperature of the plastic 2 is usually slightly higher than that of the
  • the glass transition point of the plastic 2 is preferably at least equal to or greater than that of the circuit substrate 5, wherein the glass transition point of a material is a measure of the maximum permissible operating temperature.
  • the plastic-free rear side of the heat sink 3 can be mounted for optimum heat dissipation on a part of the transmission, not shown here, prevail at the lower temperatures.
  • FIG. 2 shows an electronic module in which the heat sink 3 has a gradation 10 at the edge.
  • the gradation 10 may be circumferentially arranged on the edge of the heat sink 3, but does not have to.
  • the gradation 10 increases the contact area between the heat sink 3 and the enveloping plastic 2 and thus the creepage distance for liquids and gases which may penetrate from the outside into the electronics module, thereby reducing the likelihood of module failure.
  • the Kriechwegverinrung can alternatively be performed as grading 10 as an undercut 9, in the targeted plastic 2 can penetrate. Both creep extension measures may also occur in combination as shown in FIG.
  • the conductor structure 6 is electrically connected in FIG. 4 to the circuit carrier 5 indirectly with a bonding wire 12, for example a Cu bonding wire, whose CTE, as described above, lies in the region of the plastic 2 and is thus enveloped by the latter substantially free of stress.
  • a bonding wire 12 for example a Cu bonding wire, whose CTE, as described above, lies in the region of the plastic 2 and is thus enveloped by the latter substantially free of stress.
  • circuit carrier 5 shows an electronic module in which the conductor structure 6 is connected to the circuit carrier 5 in an electrically non-conductive manner, for example by gluing.
  • the electrically conductive connection between circuit carrier 5 and conductor structure 6 is produced by means of a bonding wire 12.
  • the electronic module according to the invention is largely insensitive to temperature fluctuations, thus substantially stress-free and thus reliably tight over its entire life.
  • the compact design of the electronic module guarantees a space-saving installation, in particular, by suitable shape of the heat sink, the electronic module can also be installed like a plug.
  • the same injection mold for different electronic circuits are used.
  • the complete encapsulation of the electronic module offers protection against plagiarism or protection against external manipulation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Structure Of Printed Boards (AREA)
  • Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
  • Non-Metallic Protective Coatings For Printed Circuits (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

L'invention concerne un module électronique, destiné à être utilisé comme dispositif de commande dans un véhicule à moteur, comprenant un circuit électronique (1) enrobé de matière plastique (2) et possédant au moins un support de circuit HDI organique (5) pour le montage direct en technologie COB. Le circuit électronique (1) est disposé sur un dissipateur thermique (3) et il comporte des structures (6) électriquement conductrices qui servent à connecter électriquement le circuit électronique (1) à des composants électriques extérieurs au module électronique. Le support de circuit (5) est couplé thermiquement au dissipateur thermique (3) et le circuit électronique (1) et le dissipateur thermique (3) sont enrobés de matière plastique (2) de telle façon que seule la face du dissipateur thermique (3) située à l'opposé du support de circuit (5) est dépourvue au moins en partie de matière plastique, de même qu'au moins les extrémités de contact (8) des structures (6) électriquement conductrices servant à la connexion des composants électriques extérieurs au module électronique. L'invention concerne également un procédé pour fabriquer ce module électronique.
EP13805754.2A 2012-12-20 2013-11-11 Module électronique contenant un circuit électronique enrobé de matière plastique et procédé pour le fabriquer Withdrawn EP2936556A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012112738.7A DE102012112738A1 (de) 2012-12-20 2012-12-20 Elektronikmodul mit einer mit Kunststoff umhüllten elektronische Schaltung und Verfahren zu dessen Herstellung
PCT/DE2013/200288 WO2014094754A1 (fr) 2012-12-20 2013-11-11 Module électronique contenant un circuit électronique enrobé de matière plastique et procédé pour le fabriquer

Publications (1)

Publication Number Publication Date
EP2936556A1 true EP2936556A1 (fr) 2015-10-28

Family

ID=49765754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13805754.2A Withdrawn EP2936556A1 (fr) 2012-12-20 2013-11-11 Module électronique contenant un circuit électronique enrobé de matière plastique et procédé pour le fabriquer

Country Status (5)

Country Link
US (1) US20150359107A1 (fr)
EP (1) EP2936556A1 (fr)
JP (1) JP2016502279A (fr)
DE (2) DE102012112738A1 (fr)
WO (1) WO2014094754A1 (fr)

Families Citing this family (23)

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DE112013006131A5 (de) 2015-09-10

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