DE102007050405B4 - Electrical power component, in particular power semiconductor module, with a cooling device and method for surface and heat-conducting bonding of a cooling device to an electrical power component - Google Patents
Electrical power component, in particular power semiconductor module, with a cooling device and method for surface and heat-conducting bonding of a cooling device to an electrical power component Download PDFInfo
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- DE102007050405B4 DE102007050405B4 DE200710050405 DE102007050405A DE102007050405B4 DE 102007050405 B4 DE102007050405 B4 DE 102007050405B4 DE 200710050405 DE200710050405 DE 200710050405 DE 102007050405 A DE102007050405 A DE 102007050405A DE 102007050405 B4 DE102007050405 B4 DE 102007050405B4
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
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- 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
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/373—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
- H01L23/3735—Laminates or multilayers, e.g. direct bond copper ceramic substrates
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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
- 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
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- 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
- H01L2224/32225—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 non-metallic, e.g. insulating substrate with or without metallisation
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- 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
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48135—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip
- H01L2224/48137—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being arranged next to each other, e.g. on a common substrate
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- 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
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48135—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip
- H01L2224/48137—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being arranged next to each other, e.g. on a common substrate
- H01L2224/48139—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being arranged next to each other, e.g. on a common substrate with an intermediate bond, e.g. continuous wire daisy chain
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- 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
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- 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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- 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
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73265—Layer and wire connectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/07—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L29/00
- H01L25/072—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L29/00 the devices being arranged next to each other
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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
- H05K1/03—Use of materials for the substrate
- H05K1/0306—Inorganic insulating substrates, e.g. ceramic, glass
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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
- 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
- H05K2203/1333—Deposition techniques, e.g. coating
- H05K2203/1344—Spraying small metal particles or droplets of molten metal
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- 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
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Abstract
Elektrische Leistungskomponente, insbesondere Leistungshalbleiter-Modul (1),
– mit einem flächigen Substrat (4) als Träger,
– mit einer flächig und wärmeleitend an das Substrat angebundenen Kühlvorrichtung zur Entwärmung der Leistungskomponente (2, 2'), wobei die Kühlvorrichtung (2, 2') über zumindest eine mittels eines Kaltgasspritzverfahrens erzeugte metallische Schicht (12) an das Substrat (4) angebunden ist,
dadurch gekennzeichnet, dass die Kühlvorrichtung (2, 2') selbst mittels des Kaltgasspritzverfahrens gebildet ist.Electrical power component, in particular power semiconductor module (1),
With a flat substrate (4) as a carrier,
- With a surface and heat-conducting connected to the substrate cooling device for cooling the power component (2, 2 '), wherein the cooling device (2, 2') via at least one generated by a cold gas spraying process metallic layer (12) to the substrate (4) is
characterized in that the cooling device (2, 2 ') itself is formed by means of the cold gas spraying process.
Description
Die Erfindung bezieht sich auf eine elektrische Leistungskomponente, insbesondere auf ein Leistungshalbleiter-Modul, mit einer Kühlvorrichtung sowie auf ein Verfahren zur flächigen und wärmeleitenden Anbindung einer Kühlvorrichtung an die Komponente.The This invention relates to an electrical power component, in particular to a power semiconductor module, with a cooling device as well on a method for areal and heat-conducting Connection of a cooling device to the component.
Aus
der
Leistungshalbleiter sind für das Steuern und Schalten hoher elektrischer Ströme und hoher elektrischer Spannungen ausgelegt. Beim Betrieb eines Leistungshalbleiter-Moduls wird dieses durch Verlustwärme stark erhitzt. Dieser Effekt wurde noch dadurch verstärkt, dass im Zuge zunehmender Miniaturisierung der Leistungshalbleiter-Module die Leiterbahnendichte sukzessive erhöht wurde. Um ein ordnungsgemäßes Funktionieren eines Leistungshalbleiter-Moduls zu gewährleisten, ist daher in der Regel ein sogenanntes Entwärmungskonzept notwendig, das im Betrieb des Leistungshalbleiter-Moduls eine Überhit zung ausschließt. Ein derartiges Entwärmungskonzept umfasst sämtliche Maßnahmen, die zusammengefasst garantieren, dass eine Grenztemperatur eines elektrischen Schaltkreises nicht überschritten wird. Eine übliche Methode zur Entwärmung eines Leistungshalbleitermoduls besteht darin, eine Kühlvorrichtung, insbesondere in Form eines Luft- oder Fluidkühlers, mit dem Modul zu verbinden.Power semiconductor are for the control and switching of high electrical currents and high electrical voltages designed. When operating a power semiconductor module this is by loss of heat strongly heated. This effect was reinforced by the fact that in the course of increasing miniaturization of the power semiconductor modules the conductor density has been successively increased. To ensure proper functioning to ensure a power semiconductor module is therefore in the Usually a so-called cooling concept necessary that during operation of the power semiconductor module overheating tion excludes. Such a cooling concept includes all Activities, The combined guarantee that a limit temperature of a electrical circuit is not exceeded. A common method for the cooling of a Power semiconductor module is a cooling device, in particular in the form of an air or fluid cooler, to connect to the module.
Für die Herstellung einer flächigen und wärmeleitenden Verbindung wird die Kühlvorrichtung an dem Trägersubstrat des elektrischen Schaltkreises insbesondere durch Verschraubung befestigt. Der Spalt zwischen dem elektrischen Bauteil und der Kühlvorrichtung wird mittels einer Übergangsschicht aus einer Wärmeleitpaste aufgefüllt, um den Wärmeübergang vom elektrischen Bauteil zu der Kühlvorrichtung zu verbessern. Jedoch ist die Wärmeleitfähigkeit der Wärmeleitpaste vergleichsweise schlecht, so dass die Übergangsschicht die Wärmeabfuhr zur Kühlvorrichtung hin behindert.For the production a flat and heat-conducting Connection becomes the cooling device on the carrier substrate the electrical circuit in particular by screwing attached. The gap between the electrical component and the cooling device is made by means of a transition layer a thermal grease filled, to the heat transfer from the electrical component to the cooling device. However, the thermal conductivity is the thermal compound comparatively bad, so that the transition layer heat dissipation to the cooler obstructed.
Alternativ werden das elektrische Bauteil und die Kühlvorrichtung miteinander verlötet, sodass das Lot eine metallische Übergangsschicht bildet, deren Wärmeleitfähigkeit gegenüber der Wärmeleitfähigkeit einer aus Wärmeleitpaste gebildeten Übergangsschicht stark verbessert ist. Besteht jedoch eine oder bestehen beide der angrenzenden Schichten des Trägersubstrats und/oder der Kühlvorrichtung aus einem nicht oder schwer lötbaren Werkstoff, wie z. B. Aluminium, so lässt sich ein Lötvorgang nur mit großem Aufwand oder überhaupt nicht durchführen. Auf der anderen Seite handelt es sich speziell bei Aluminium um einen sehr gut verarbeitbaren und vor allem gut wärmeleitenden Werkstoff. Deshalb sind oftmals die Kühlvorrichtung und/oder die auf die Kühlvorrichtung weisende Seite des elektrischen Bauteils aus Aluminium gefertigt. In diesen Fällen wird aus Kostengründen oftmals auf ein Verlöten verzichtet und auf die erste Variante mit der Wärmeleitpaste zurückgegriffen.alternative Both the electrical component and the cooling device are soldered together, so that the solder is a metallic transition layer forms, whose thermal conductivity across from the thermal conductivity one of thermal grease formed transition layer is greatly improved. However, if there is one or both of them adjacent layers of the carrier substrate and / or the cooling device from a not or hard solderable Material, such as. As aluminum, so can a soldering process only with big Effort or at all do not perform. On the other hand, it is aluminum in particular a very good processable and above all good heat-conducting Material. Therefore, often the cooling device and / or the on the cooling device facing side of the electrical component made of aluminum. In these cases is for cost reasons often on a soldering dispensed with and resorted to the first variant with the thermal grease.
Eine
elektrische Leistungskomponente nach dem Oberbegriff des Anspruchs
1 ist aus
Aufgabe der Erfindung ist es daher, die Kühlvorrichtung in verbesserter Weise flächig und wärmeleitend an eine elektrische Leistungskomponente anzubinden.task The invention therefore, the cooling device in improved Way flat and heat-conducting to connect to an electrical power component.
Diese
Aufgabe wird erfindungsgemäß gelöst durch
die Merkmalskombination des Anspruchs 1. Hierzu ist die Kühlvorrichtung über zumindest
eine mittels eines Kaltgasspritzverfahrens erzeugte metallische
Schicht an das Substrat angebunden. Die Erfindung beruht auf der
Erkenntnis, dass sich mittels eines Kaltgasspritzverfahrens metallische
Schichten mit einer hohen Wärmeleitfähigkeit
erzeugen lassen. Die Grundlagen des Kaltgasspritzverfahrens sind
in der
Dabei ist die Kühlvorrichtung selbst mittels des Kaltgasspritzverfahrens gebildet. Mit anderen Worten erfolgt mittels des Kaltgasspritzverfahrens ein Materialauftrag auf das Substrat, der die Struktur der Kühlvorrichtung vorgibt. Dieser Materialauftrag kann die Struktur von Kühlrippen oder Vorsprünge nach Art von Mäandern aufweisen.there is the cooling device itself formed by means of the cold gas spraying process. In other words takes place by means of the cold gas spraying a material application on the substrate, which dictates the structure of the cooling device. This Material application can after the structure of cooling fins or protrusions Kind of meanders exhibit.
Durch eine Anbindung der Kühlvorrichtung an das Substrat mittels des Kaltgasspritzverfahrens ist daher erkanntermaßen ein besonders effizienter Wärmeübergang realisierbar.By a connection of the cooling device the substrate by means of the cold gas spraying method is therefore recognized to be particularly efficient heat transfer realizable.
Zweckmäßig lässt sich die als Kühlvorrichtung aufgetragene metallische Schicht zusätzlich konturieren, d. h., mit einer unregelmäßigen und zerklüfteten Oberfläche versehen. Auf diese Weise lässt sich die Oberfläche der Kühlvorrichtung vergrößern, so dass ein besonders guter Wärmeübergang durch Konvektion erreichbar ist.Appropriately, can be as a cooling device additionally contour the applied metallic layer, d. H., with an irregular and fissured surface Mistake. That way you can the surface the cooling device enlarge, so that a particularly good heat transfer can be reached by convection.
Auf diese Weise lassen sich bestehende Leistungshalbleiter-Module effektiv kühlen. Weiterhin gestattet die Anbindung der Kühlvorrichtung mittels einer kaltgasgespritzten Schicht an das Leistungshalbleiter-Modul auch die Entwicklung von Leistungshalbleiter-Modulen mit einem höheren Integrationsgrad, d. h., mit einer erhöhten Anzahl von Leiterbahnen je Flächeneinheit, da über die verbesserte Anbindung der Kühlvorrichtung nunmehr eine erhöhte Wärmemenge abführbar ist. Die beschriebene Anbindung einer Kühlvorrichtung ist für jede elektrische Leistungskomponente realisierbar. Unter einer elektrischen Leistungskomponente ist hier jeder elektrische Schaltkreis zu verstehen, der eine große Wärmemenge produziert, insbesondere ein Mikrocontroller oder dergleichen.On This way, existing power semiconductor modules can be effectively cooled. Furthermore allowed the connection of the cooling device by means of a cold gas-sprayed layer to the power semiconductor module also the development of power semiconductor modules with a higher degree of integration, d. h., with an elevated Number of tracks per unit area, over there the improved connection of the cooling device now an increased amount of heat dischargeable is. The described connection of a cooling device is for each electrical power component realizable. Below an electrical power component is here every electrical circuit to understand that has a large amount of heat produced, in particular a microcontroller or the like.
Die Begriffe „metallisch” und „Metall” werden dahingehend verstanden, dass die metallische Schicht sowohl aus einem elementaren Metall, als auch aus einer Metalllegierung bestehen kann.The The terms "metallic" and "metal" are used to this effect understood that the metallic layer consists of both an elementary Metal, as well as may consist of a metal alloy.
In einer zweckmäßigen Weiterbildung ist als Kühlvorrichtung ein Fluidkühler vorgesehen. Ein Fluid als Kühlmedium weist gegenüber Luft oder einem Gas eine bedeutend höhere Wärmekapazität auf. Mittels eines Fluidkühlers ist daher eine bedeutend größere Wärmemenge vom Leistungshalbleiter-Modul abführbar, als mittels eines Luftkühlers. Der Fluidkühler kann vorteilhaft gebildet werden, indem die Kühlrippen eines Rippenkühlers oder die Vorsprünge eines Kühlers mit mäanderförmigen Vorsprüngen zur Bildung von Strömungskanälen verschlossen werden. Der Rippenkühler oder der Kühler mit den mäanderförmigen Vorsprüngen wird zweckmäßig wie bereits weiter oben beschrieben erzeugt. Die Strömungskanäle werden gebildet, in dem benachbarte Rippen oder Vorsprünge an ihren Freiende flächig miteinander verbunden werden. Dies geschieht im einfachsten Fall durch die Befestigung eines dünnen Blechs an den Freienden der Rippen oder an den Freienden der Vorsprünge. Die Befestigung des Blechs ist hierbei beliebig. So kann das Blech durch Verschrauben oder durch Verlöten an den Freienden der Rippen oder an den Freienden der Vorsprünge befestigt sein. Auch die Freienden der Rippen oder die Freienden der Vorsprünge können mit einer lötbaren metallischen Schicht mittels Kaltgasspritzen versehen werden, um ein schlecht oder nicht lötbares Material wie Aluminium löten zu können. Dies kann fertigungstechnisch insbesondere bei einem filigranen Kühler mit dünnen Kühlrippen oder mäanderförmigen Vorsprüngen gegenüber einem Verschrauben des Blechs Vorzüge haben.In an appropriate training is as a cooler a fluid cooler intended. A fluid as a cooling medium points opposite Air or a gas has a significantly higher heat capacity. By means of a fluid cooler is therefore a significantly larger amount of heat deductible from the power semiconductor module, as by means of an air cooler. Of the fluid cooler can be advantageously formed by the cooling fins of a fin cooler or the projections of a cooler with meandering projections for formation closed by flow channels become. The rib cooler or the cooler with the meandering projections as appropriate described above. The flow channels are formed in the adjacent ribs or protrusions at their free area flat with each other get connected. This is done in the simplest case by the attachment a thin sheet at the free ends of the ribs or at the free ends of the protrusions. The Attachment of the sheet is hereby arbitrary. So the sheet can be screwed or by soldering attached to the free ends of the ribs or to the free ends of the protrusions be. The free ends of the ribs or the free ends of the projections can with a solderable one metallic layer by means of cold gas spraying to be a bad or not solderable material How to solder aluminum to be able to. This can manufacturing technology, especially in a filigree cooler with thin ones cooling fins or meandering projections over one Screwing the sheet metal benefits to have.
Die Aufgabe wird weiterhin gelöst durch ein Verfahren zum flächigen und wärmeleitenden Anbinden einer Kühlvorrichtung an eine elektrische Leistungskomponente, insbesondere an ein Leistungshalbleiter-Modul mit den Merkmalen des Patentanspruchs 7. Hierbei sind die Ausgestaltungen des Leistungshalbleiter-Moduls mit der Kühlvorrichtung und ihre Vorzüge den auf die Vorrichtung gerichteten vorstehenden Ausführungen zu entnehmen.The Task is still solved by a method for planar and heat-conducting Connecting a cooling device to an electrical power component, in particular to a power semiconductor module with the features of claim 7. Here are the embodiments of the power semiconductor module with the cooling device and its merits on refer to the device directed above.
In einer zweckmäßigen Variante wird die Kühlvorrichtung mittels einer auf das Substrat reversibel aufbrachten Maske gebildet. Eine derartige Maske ist mit Ausnehmungen versehen, die das negative Abbild der zu bildenden Kühlvorrichtung darstellen. Für die Bildung der Kühlvorrichtung wird die Maske zunächst auf das Substrat aufgelegt oder am Substrat reversibel befestigt. Anschließend werden mittels einer Kaltgasspritzvorrichtung, insbesondere mit einer Kaltgasspritzpistole, die Ausnehmungen der Maske mit einer metallischen Schicht aufgefüllt. Somit lässt sich die Kühlvorrichtung in zeitsparender und reproduzierbarer Weise den Anforderungen einer Serienfertigung gemäß erzeugen.In a suitable variant becomes the cooling device formed by means of a reversibly applied to the substrate mask. Such a mask is provided with recesses which are the negative Image of the cooling device to be formed represent. For the formation of the cooling device the mask is first placed on the substrate or reversibly attached to the substrate. Subsequently be by means of a cold gas spraying device, in particular with a Kaltgasspritzpistole, the recesses of the mask with a filled with metallic layer. Consequently let yourself the cooling device in a time-saving and reproducible way the requirements of a Generate series production according to.
In einer zweckmäßigen Weiterbildung wird die Kühlvorrichtung gebildet, indem eine Kaltgasspritzvorrichtung, insbesondere eine Kaltgasspritzpistole, in Bahnen über das Substrat bewegt wird. Falls eine Maske mit Ausnehmungen nach der bereits beschriebenen Weise verwendet wird, lässt sich eine Beschichtung der Maske auf diese Weise weitgehend vermeiden, so dass die Maske auch über einen längeren Zeitraum verwendbar ist. In einer anderen Variante lässt sich die Kühlvorrichtung auch ohne eine aufgelegte Maske erzeugen. Hierzu wird die Kaltgasspritzvorrichtung über bestimmte Gebiete des Substrats öfter bewegt, als über andere Gebiete, so dass im Lauf des Beschichtungsvorganges ein unregelmäßiger Materialauftrag nach Art von Rippen oder meanderförmigen Vorsprüngen gebildet ist. Wird hingegen die Kaltgasspritzvorrichtung in regelmäßigen Bahnen über das Substrat bewegt, so lässt sich ein gleichmäßiger Schichtaufbau für die Bildung einer lötbaren metallischen Schicht oder für eine Basis eines Kühlers erzeugen.In an expedient development, the cooling device is formed by a cold gas spraying device, in particular a cold gas spray gun, is moved in tracks over the substrate. If a mask with recesses is used in the manner already described, a coating of the mask in this way can be largely avoided, so that the mask can be used over a longer period of time. In another variant, the cooling device can also be produced without an applied mask. For this purpose, the cold gas spraying device is moved over certain areas of the substrate more often than over other areas, so that in the course of the coating process, an irregular material application in the manner of ribs or meandering projections is formed. If, on the other hand, the cold gas spraying device is moved over the substrate in regular paths, a uniform layer structure can be produced for the formation of a solderable metallic layer or for a base of a cooler.
Zweckmäßig werden zur Erzeugung der metallischen Schicht einer oder mehrere Spritzparameter zur Beeinflussung der Schichteigenschaften vorgegeben.Be useful to produce the metallic layer one or more spray parameters predetermined for influencing the layer properties.
So wird als Spritzparameter eine Eigenschaft eines dem Kaltgasspritzverfahrens zugrundeliegenden Trägergases, insbesondere dessen chemische Zusammensetzung, dessen Massenstrom oder dessen Temperatur, herangezogen.So is a characteristic of the cold gas spraying process as a spraying parameter underlying carrier gas, in particular its chemical composition, its mass flow or its temperature, used.
Weiterhin wird als Spritzparameter eine Eigenschaft eines dem Kaltgasspritzverfahren zugrundeliegenden metallischen Pulvers, insbesondere dessen chemische Zusammensetzung, dessen Massenstrom oder dessen Partikelgrößenverteilung, herangezogen. Zweckmäßig wird weiterhin als Spritzparameter eine Düsengeometrie einer dem Kaltgasspritzverfahrens zugrundeliegenden Kaltgasspritzpistole herangezogen.Farther is a spray parameter a property of the cold gas spraying process underlying metallic powder, in particular its chemical Composition, its mass flow or its particle size distribution, used. It is useful furthermore as a spray parameter a nozzle geometry of the cold gas spraying process underlying cold gas spray gun used.
Weiterhin wird zweckmäßig ein Spritzparameter eine Eigenschaft des Substrats, insbesondere dessen Werkstoff oder dessen Temperatur während des Beschichtens herangezogen.Farther will be useful Spray parameters a property of the substrate, in particular its Material or its temperature used during the coating.
Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher erläutert. Darin zeigt die einzige Figur schematisch ein Halbleitermodul mit einer Kühlvorrichtung.following is an embodiment of Invention explained in more detail with reference to a drawing. In it shows the only one Figure schematically a semiconductor module with a cooling device.
Die
Figur zeigt ein Leistungshalbleiter-Modul
Auf
der strukturierten metallischen Schicht
An
das Leistungshalbleiter-Modul
Weiterhin
umfasst die Kühlvorrichtung
Im
Betrieb des Leistungshalbleiter-Moduls
Der
Rippenkühler
Alternativ
kann anstelle eines Materialauftrags zur Erzeugung des Rippenkühlers
Claims (17)
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DE200710050405 DE102007050405B4 (en) | 2007-10-22 | 2007-10-22 | Electrical power component, in particular power semiconductor module, with a cooling device and method for surface and heat-conducting bonding of a cooling device to an electrical power component |
PCT/EP2008/064207 WO2009053357A1 (en) | 2007-10-22 | 2008-10-21 | Electrical power component, in particular power semiconductor module, having a cooling device and method for the planar and heat-conductive attachment of a cooling device to an electrical power component |
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DE200710050405 DE102007050405B4 (en) | 2007-10-22 | 2007-10-22 | Electrical power component, in particular power semiconductor module, with a cooling device and method for surface and heat-conducting bonding of a cooling device to an electrical power component |
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DE102009045063C5 (en) | 2009-09-28 | 2017-06-01 | Infineon Technologies Ag | Power semiconductor module with molded-on heat sink, power semiconductor module system and method for producing a power semiconductor module |
DE102012103786B4 (en) * | 2012-04-30 | 2017-05-18 | Rogers Germany Gmbh | Metal-ceramic substrate and method for producing a metal-ceramic substrate |
DE102014201306A1 (en) * | 2014-01-24 | 2015-07-30 | Siemens Aktiengesellschaft | Power electronics module with 3D-made cooler |
WO2016108958A1 (en) | 2014-12-31 | 2016-07-07 | Dow Global Technologies Llc | Crash durable epoxy adhesive compositions having improved low-temperature impact resistance and wash off resistance |
EP3468311B1 (en) | 2017-10-06 | 2023-08-23 | AT & S Austria Technologie & Systemtechnik Aktiengesellschaft | Metal body formed on a component carrier by additive manufacturing |
EP3468312B1 (en) | 2017-10-06 | 2023-11-29 | AT & S Austria Technologie & Systemtechnik Aktiengesellschaft | Method of manufacturing a component carrier having a three dimensionally printed wiring structure |
DE102018208844B3 (en) | 2018-06-05 | 2019-10-02 | Continental Automotive Gmbh | Heat sink, power electronics module with a heat sink and method for producing the heat sink |
DE102019215793A1 (en) * | 2019-10-14 | 2021-04-15 | Vitesco Technologies GmbH | Wiring substrate for a semiconductor device and method for manufacturing a wiring substrate |
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WO2009053357A1 (en) | 2009-04-30 |
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