DE102018102002A1 - Method for producing a power semiconductor module and power semiconductor module - Google Patents
Method for producing a power semiconductor module and power semiconductor module Download PDFInfo
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- DE102018102002A1 DE102018102002A1 DE102018102002.3A DE102018102002A DE102018102002A1 DE 102018102002 A1 DE102018102002 A1 DE 102018102002A1 DE 102018102002 A DE102018102002 A DE 102018102002A DE 102018102002 A1 DE102018102002 A1 DE 102018102002A1
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Abstract
Die Erfindung betrifft ein Verfahren zur Herstellung eines Leistungshalbleitermoduls mit folgenden Verfahrensschritten:a) Bereitstellen eines Substrats auf dem ein Leistungshalbleiterbauelement angeordnet ist, einer Kontaktfeder und eines aus einem Kunststoff bestehenden Federführungselements, das einen Schacht aufweist,b) Anordnen des Substrats und des Federführungselements derart, dass nach dem Anordnen eine zweite Öffnung des Schachts dem Substrat zugewandt angeordnet ist,c) Einführen zumindest eines Teils der Kontaktfeder in den Schacht über eine erste Öffnung des Schachts,d) Plastisches Verformen eines in einem an die erste Öffnung des Schachts angrenzenden Bereich des Federführungselements angeordneten Materials des Federführungselements derart, dass zumindest an einer Stelle in dem an die erste Öffnung angrenzenden Bereich des Federführungselements, Material des Federführungselements in die erste Öffnung hineinverformt wird, wobei durch das in die erste Öffnung hineinverformte Material eine Bewegung der Kontaktfeder in Richtung von der zweiten Öffnung zur ersten Öffnung begrenzt wird.Weiterhin betrifft die Erfindung ein diesbezügliches Leistungshalbleitermodul.The invention relates to a method for producing a power semiconductor module with the following method steps: a) provision of a substrate on which a power semiconductor component is arranged, a contact spring and a spring guide element consisting of a plastic, which has a shaft, b) arranging the substrate and the spring guide element in such a way, c) inserting at least a part of the contact spring into the shaft via a first opening of the shaft; d) plastically deforming a region of the spring guide element adjacent to the first opening of the shaft arranged material of the spring guide element such that at least at one point in the region adjacent to the first opening portion of the spring guide element, material of the spring guide element is deformed into the first opening, through which in the first opening deformed material is a movement of the contact spring in the direction of the second opening to the first opening is limited.Furthermore, the invention relates to a related power semiconductor module.
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines Leistungshalbleitermoduls und ein Leistungshalbleitermodul.The invention relates to a method for producing a power semiconductor module and a power semiconductor module.
Aus der
Bei Leistungshalbleitermodulen bei denen in Schächten anordnete Kontaktfedern zum elektrisch leitenden Verbinden einer externen Leiterplatte mit einem Substrat des Leistungshalbleitermoduls verwendet werden, ist das technische Bedürfnis vorhanden, dass die Kontaktfedern gegen Herausfallen aus dem Schacht gesichert sind, da diese sonst, z.B. beim Transport oder beim Einbau in ein übergeordnetes elektrisches System, verloren gehen können. Weiterhin sollen solche Leistungshalbleitermodule einfach und rationell herstellbar sein.In power semiconductor modules in which contact springs arranged in wells are used to electrically connect an external circuit board to a substrate of the power semiconductor module, there is a technical need for the contact springs to be prevented from falling out of the well, since otherwise such as e.g. can be lost during transport or installation in a higher-level electrical system. Furthermore, such power semiconductor modules should be simple and efficient to produce.
Es ist Aufgabe der Erfindung ein Verfahren zur Herstellung eines Leistungshalbleitermoduls und ein Leistungshalbleitermodul zu schaffen, bei dem eine in einem Schacht eines Federführungselements des Leistungshalbleitermoduls angeordnete Kontaktfeder des Leistungshalbleitermoduls zuverlässig in einem Schacht des Leistungshalbleitermoduls gegen Herausfallen aus den Schacht gesichert ist, wobei das Verfahren eine rationelle Herstellung des Leistungshalbleitermoduls ermöglicht.It is the object of the invention to provide a method for producing a power semiconductor module and a power semiconductor module in which a contact spring of the power semiconductor module arranged in a shaft of a spring guide element of the power semiconductor module is reliably secured in a slot of the power semiconductor module against falling out of the slot, the method being a rational one Production of the power semiconductor module allows.
Diese Aufgabe wird gelöst durch ein Verfahren zur Herstellung eines Leistungshalbleitermoduls mit folgenden Verfahrensschritten:
- a) Bereitstellen eines Substrats auf dem ein Leistungshalbleiterbauelement angeordnet ist und mit dem Substrat elektrisch leitend verbunden ist, und Bereitstellen einer elektrisch leitenden Kontaktfeder, die eine erste und eine zweite Kontakteinrichtung und einen zwischen der ersten und zweiten Kontakteinrichtung angeordneten federnden Federabschnitt aufweist, und Bereitstellen eines aus einem Kunststoff bestehenden Federführungselements, das einen Schacht aufweist, wobei der Schacht an einer ersten Seite des Federführungselements eine erste Öffnung aufweist und an einer zweiten Seite des Federführungselements eine zweite Öffnung aufweist,
- b) Anordnen des Substrats und des Federführungselements derart, dass nach dem Anordnen des Substrats und des Federführungselements die zweite Öffnung dem Substrat zugewandt angeordnet ist,
- c) Einführen zumindest eines Teils der Kontaktfeder in den Schacht über die erste Öffnung, wobei dabei zumindest ein Teil der zweiten Kontakteinrichtung durch den Schacht und durch die zweite Öffnung hindurchgeführt wird,
- d) Plastisches Verformen eines in einem an die erste Öffnung angrenzenden Bereich des Federführungselements angeordneten Materials des Federführungselements derart, dass zumindest an einer Stelle in dem an die erste Öffnung angrenzenden Bereich des Federführungselements, Material des Federführungselements in die erste Öffnung hineinverformt wird, wobei durch das in die erste Öffnung hineinverformte Material eine Bewegung der Kontaktfeder in Richtung von der zweiten Öffnung zur ersten Öffnung begrenzt wird.
- a) providing a substrate on which a power semiconductor component is arranged and is electrically conductively connected to the substrate, and providing an electrically conductive contact spring having a first and a second contact means and a resilient spring portion arranged between the first and second contact means, and providing a plastic guide spring element having a shaft, the shaft having a first opening on a first side of the spring guide element and a second opening on a second side of the spring guide element,
- b) arranging the substrate and the spring guide element in such a way that, after arranging the substrate and the spring guide element, the second opening is arranged facing the substrate,
- c) introducing at least a part of the contact spring into the shaft via the first opening, wherein at least part of the second contact device is passed through the shaft and through the second opening,
- d) plastically deforming a material of the spring guide element disposed in a region of the spring guide element adjoining the first opening such that material of the spring guide element is deformed into the first opening at least at one point in the region of the spring guide element adjoining the first opening, wherein through the Material deformed into the first opening limits movement of the contact spring in the direction from the second opening to the first opening.
Weiterhin wird diese Aufgabe wird gelöst durch ein Leistungshalbleitermodul mit einem Substrat auf dem ein Leistungshalbleiterbauelement angeordnet ist und mit dem Substrat elektrisch leitend verbunden ist, mit einer elektrisch leitenden Kontaktfeder, die eine erste und eine zweite Kontakteinrichtung und einen zwischen der ersten und zweiten Kontakteinrichtung angeordneten federnden Federabschnitt aufweist, mit aus einem Kunststoff bestehenden Federführungselement, das einen Schacht aufweist, wobei der Schacht an einer ersten Seite des Federführungselements eine erste Öffnung aufweist und an einer zweiten Seite des Federführungselements eine zweite Öffnung aufweist, wobei die zweite Öffnung dem Substrat zugewandt angeordnet ist, wobei ein Teil der Kontaktfeder in dem Schacht angeordnet ist, wobei die zweite Kontakteinrichtung oberhalb einer Kontaktfläche des Substrats angeordnet ist oder einen mechanischen Kontakt mit einer Kontaktfläche des Substrats aufweist, wobei zumindest ein Teil der ersten Kontakteinrichtung in Richtung weg vom Substrat über die erste Öffnung hinaussteht, wobei durch plastisches Verformen von in einem an die erste Öffnung angrenzenden Bereich des Federführungselements angeordneten Materials des Federführungselements, zumindest an einer Stelle in dem an die erste Öffnung angrenzenden Bereich des Federführungselements, Material des Federführungselements in die erste Öffnung hineinverformt ist, wobei das in die erste Öffnung hineinverformte Material eine Bewegung der Kontaktfeder in Richtung von der zweiten Öffnung zur ersten Öffnung begrenzt.Furthermore, this object is achieved by a power semiconductor module having a substrate on which a power semiconductor component is arranged and is electrically conductively connected to the substrate, with an electrically conductive contact spring having a first and a second contact means and a resilient arranged between the first and second contact means Spring section having a spring guide element consisting of a plastic, which has a shaft, wherein the shaft has a first opening on a first side of the spring guide element and has a second opening on a second side of the spring guide element, wherein the second opening is arranged facing the substrate, wherein a part of the contact spring is arranged in the shaft, wherein the second contact device is arranged above a contact surface of the substrate or has a mechanical contact with a contact surface of the substrate, wherein at least a part of the first contact device protrudes in the direction away from the substrate beyond the first opening, wherein material of the spring guide element arranged in a region adjacent to the first opening of the spring guide element is plastically deformed, at least at one point in the region of the spring guide element adjoining the first opening , Material of the spring guide member is deformed into the first opening, wherein the material deformed into the first opening limits movement of the contact spring in the direction from the second opening to the first opening.
Vorteilhafte Ausbildungen des Leistungshalbleitermoduls ergeben sich analog zu vorteilhaften Ausbildungen des Verfahrens und umgekehrt.Advantageous embodiments of the power semiconductor module are analogous to advantageous embodiments of the method and vice versa.
Vorteilhafte Ausbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.Advantageous embodiments of the invention will become apparent from the dependent claims.
Es erweist sich als vorteilhaft, dass Verfahrensschritt b) zeitlich vor Verfahrensschritt c) oder nach Verfahrensschritt d) erfolgen kann. Hierdurch weist das Verfahren eine hohe Flexibilität auf. It proves to be advantageous that process step b) can take place temporally before process step c) or after process step d). As a result, the method has a high flexibility.
Weiterhin erweist sich folgender weitere Verfahrensschritt als vorteilhaft:
- e) Bewegen des Federführungselements auf das Substrat zu, wobei zumindest nach dieser Bewegung die zweite Kontakteinrichtung einen mechanischen Kontakt mit einer elektrisch leitenden Kontaktfläche des Substrats aufweist und zumindest ein Teil der ersten Kontakteinrichtung in Richtung weg vom Substrat über die erste Öffnung hinaussteht.
- e) moving the spring guide element toward the substrate, wherein at least after this movement, the second contact device has a mechanical contact with an electrically conductive contact surface of the substrate and at least a part of the first contact device protrudes in the direction away from the substrate via the first opening.
Hierdurch kann der elektrisch leitende Kontakt zwischen der Kontaktfläche des Substrats und der Kontaktfeder auf einfache Art und Weise beim Hersteller des Leistungshalbleitermoduls getestet werden.In this way, the electrically conductive contact between the contact surface of the substrate and the contact spring can be tested in a simple manner at the manufacturer of the power semiconductor module.
Weiterhin erweist es sich als vorteilhaft, wenn das plastische Verformen durch Heißverstemmen erfolgt, da mittels Heißverstemmen eine präzise plastische Verformung des Materials des Federführungselements erzielt wird.Furthermore, it proves to be advantageous if the plastic deformation takes place by staking, since by means of hot caulking a precise plastic deformation of the material of the spring guide element is achieved.
Ferner erweist es sich als vorteilhaft, wenn das plastische Verformen des im an die erste Öffnung angrenzenden Bereich der ersten Öffnung angeordneten Materials des Federführungselements derart erfolgt, dass zumindest an zwei im Bezug zur ersten Öffnung gegenüberliegend angeordneten Stellen in dem an die erste Öffnung angrenzenden Bereich des Federführungselements, Material des Federführungselements in die erste Öffnung hineinverformt wird, wobei durch das in die erste Öffnung hineinverformte Material eine Bewegung der Kontaktfeder in Richtung von der zweiten Öffnung zur ersten Öffnung begrenzt wird. Hierdurch wird die erste Öffnung zuverlässig verkleinert.Furthermore, it proves to be advantageous if the plastic deformation of the material of the spring guide element disposed in the region of the first opening adjoining the first opening takes place in at least two points opposite to the first opening in the region of the first opening Spring guide element, material of the spring guide element is deformed into the first opening, wherein by the material deformed into the first opening material movement of the contact spring in the direction of the second opening to the first opening is limited. As a result, the first opening is reliably reduced.
Ferner erweist es sich als vorteilhaft, wenn das Federführungselement ein Gehäuseteil des Leistungshalbleitermoduls ausbildet, da dann das Leistungshalbleitermodul besonders rationell herstellt werden kann.Furthermore, it proves to be advantageous if the spring guide element forms a housing part of the power semiconductor module, since then the power semiconductor module can be produced particularly efficiently.
Weiterhin erweist es sich als vorteilhaft, wenn der Federabschnitt als Schraubenfeder ausgebildet ist, da eine Schraubenfeder über einen weiten Dehnungsbereich eine zum Dehnungsbereich proportionale Federkraft aufweist.Furthermore, it proves to be advantageous if the spring portion is designed as a helical spring, since a helical spring over a wide strain range has a spring force proportional to the expansion area.
Weiterhin erweist es sich als vorteilhaft, wenn durch das plastische Verformen von im an die erste Öffnung angrenzenden Bereich der ersten Öffnung angeordneten Materials des Federführungselements, zumindest an zwei im Bezug zur ersten Öffnung gegenüberliegend angeordneten Stellen in dem an die erste Öffnung angrenzenden Bereich des Federführungselements, Material des Federführungselements in die erste Öffnung hineinverformt ist, wobei das in die erste Öffnung hineinverformte Material eine Bewegung der Kontaktfeder in Richtung von der zweiten Öffnung zur ersten Öffnung begrenzt. Hierdurch ist die erste Öffnung zuverlässig verkleinert.Furthermore, it proves to be advantageous if, as a result of the plastic deformation of material of the spring guide element arranged in the region of the first opening adjoining the first opening, at least two points disposed opposite to the first opening in the region of the spring guide element adjoining the first opening, Material of the spring guide element is deformed into the first opening, wherein the deformed into the first opening material limits movement of the contact spring in the direction from the second opening to the first opening. As a result, the first opening is reliably reduced.
Ein Ausführungsbeispiel der Erfindung wird nachfolgend unter Bezugnahme auf die unten stehenden Figuren erläutert. Dabei zeigen:
-
1 eine perspektivische Schnittansicht eines erfindungsgemäßen Leistungshalbleitermoduls in einem Endzustand seiner Herstellung, -
2 eine Kontaktfeder des erfindungsgemäßen Leistungshalbleitermoduls, -
3 eine perspektivische Detailansicht auf einen, um die erste Öffnung des erfindungsgemäßen Leistungshalbleitermoduls angeordneten, Bereich des erfindungsgemäßen Leistungshalbleitermoduls, in einem Zustand bevor das Material des Federführungselements des erfindungsgemäßen Leistungshalbleitermoduls plastisch verformt wird, -
4 eine perspektivische Detailansicht auf einen, um die erste Öffnung des erfindungsgemäßen Leistungshalbleitermoduls angeordneten, Abschnitt des erfindungsgemäßen Leistungshalbleitermoduls, in einem Zustand nach dem das Material des Federführungselements des erfindungsgemäßen Leistungshalbleitermoduls plastisch verformt wurde, -
5 eine perspektivische Detailansicht auf einen, um die erste Öffnung des erfindungsgemäßen Leistungshalbleitermoduls angeordneten, Abschnitt des erfindungsgemäßen Leistungshalbleitermoduls, in einem Endzustand und -
6 eine stark schematisierte Schnittansicht eines Werkzeugstempels zum Heißverstemmen.
-
1 3 shows a perspective sectional view of a power semiconductor module according to the invention in a final state of its production, -
2 a contact spring of the power semiconductor module according to the invention, -
3 a detailed perspective view of a, arranged around the first opening of the power semiconductor module according to the invention, the region of the power semiconductor module according to the invention, in a state before the material of the spring guide element of the power semiconductor module according to the invention is plastically deformed, -
4 a detailed perspective view of a, arranged around the first opening of the power semiconductor module according to the invention, section of the power semiconductor module according to the invention, in a state after which the material of the spring guide element of the power semiconductor module according to the invention was plastically deformed, -
5 a detailed perspective view of a arranged around the first opening of the power semiconductor module according to the invention, section of the power semiconductor module according to the invention, in a final state and -
6 a highly schematic sectional view of a tool stamp for hot caulking.
In
In einen ersten Verfahrensschritt a) des erfindungsgemäßen Verfahrens zur Herstellung des erfindungsgemäßen Leistungshalbleitermoduls
Das jeweilige Leistungshalbleiterbauelement
In einem, vorzugsweise dem ersten Verfahrensschritt a) nachfolgenden, zweiten Verfahrensschritt b) erfolgt ein Anordnen des Substrats
In einen, vorzugsweise dem zweiten Verfahrensschritt b) nachfolgenden, dritten Verfahrensschritt c) erfolgt ein Einführen zumindest eines Teils der Kontaktfeder
In einem dem dritten Verfahrensschritt c) nachfolgenden vierten Verfahrensschritt d) erfolgt ein plastisches Verformen eines in einem an die erste Öffnung
Das plastische Verformen des im an die erste Öffnung
Das plastische Verformen des Materials
In einem dem vierten Verfahrensschritt d) nachfolgenden vorzugsweise durchzuführenden fünften Verfahrensschritt e) erfolgt ein Bewegen des Federführungselements
Es sei angemerkt, dass der zweite Verfahrensschritt b) zeitlich, wie beim Ausführungsbeispiel, vor den dritten Verfahrensschritt c) erfolgen kann oder aber auch nach dem vierten Verfahrensschritt d) erfolgen kann. Der zweite Verfahrensschritt b) erfolgt zeitlich vor dem fünften Verfahrensschritt e).It should be noted that the second method step b) can take place in time, as in the exemplary embodiment, before the third method step c), or else can take place after the fourth method step d). The second process step b) takes place before the fifth process step e).
Die Kontaktfeder
Das hergestellte erfindungsgemäße Leistungshalbleitermodul
Vorzugsweise ist durch das plastische Verformen von, im an die erste Öffnung
Selbstverständlich können, sofern dies nicht per se ausgeschlossen ist, die im Singular genannten Merkmale, insbesondere das Substrat
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102008057832 A1 [0002]DE 102008057832 A1 [0002]
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DE102008057832A1 (en) | 2008-11-19 | 2010-05-27 | Semikron Elektronik Gmbh & Co. Kg | Power semiconductor module with preloaded auxiliary contact spring |
DE102006006421B4 (en) * | 2006-02-13 | 2014-09-11 | Semikron Elektronik Gmbh & Co. Kg | The power semiconductor module |
DE102015113111A1 (en) * | 2015-08-10 | 2017-02-16 | Infineon Technologies Ag | Power semiconductor module with improved sealing |
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DE102006058692A1 (en) * | 2006-12-13 | 2008-06-26 | Semikron Elektronik Gmbh & Co. Kg | Power semiconductor module with contact springs |
DE102010035980B4 (en) * | 2010-09-01 | 2014-03-20 | Semikron Elektronik Gmbh & Co. Kg | Connection device for a power semiconductor module |
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DE102006006421B4 (en) * | 2006-02-13 | 2014-09-11 | Semikron Elektronik Gmbh & Co. Kg | The power semiconductor module |
DE102008057832A1 (en) | 2008-11-19 | 2010-05-27 | Semikron Elektronik Gmbh & Co. Kg | Power semiconductor module with preloaded auxiliary contact spring |
DE102015113111A1 (en) * | 2015-08-10 | 2017-02-16 | Infineon Technologies Ag | Power semiconductor module with improved sealing |
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