DE102020127606B4 - Power electronic switching device with a heat-conducting device and method for its production - Google Patents
Power electronic switching device with a heat-conducting device and method for its production Download PDFInfo
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- DE102020127606B4 DE102020127606B4 DE102020127606.0A DE102020127606A DE102020127606B4 DE 102020127606 B4 DE102020127606 B4 DE 102020127606B4 DE 102020127606 A DE102020127606 A DE 102020127606A DE 102020127606 B4 DE102020127606 B4 DE 102020127606B4
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- semiconductor component
- power semiconductor
- heat
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- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 8
- 239000004065 semiconductor Substances 0.000 claims abstract description 58
- 239000004020 conductor Substances 0.000 claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 33
- 239000011810 insulating material Substances 0.000 claims abstract description 24
- 239000011888 foil Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 239000012774 insulation material Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 6
- 229910052582 BN Inorganic materials 0.000 claims description 4
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 4
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 4
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 230000005855 radiation Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 229920001558 organosilicon polymer Polymers 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 229920001059 synthetic polymer Polymers 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910002808 Si–O–Si Inorganic materials 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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Abstract
Leistungselektronische Schalteinrichtung (1) mit einem eine Normalenrichtung (N) aufweisenden Substrat (2) mit einer ersten und einer zweiten Leiterbahn (22,24), wobei auf der ersten Leiterbahn (22) ein Leistungshalbleiterbauelement (5) mittels einer elektrisch leitfähigen Verbindung (900) angeordnet ist, wobei das Leistungshalbleiterbauelement 5 einen seitlich umlaufenden Rand (50) und auf seiner ersten, dem Substrat (2) abgewandten Hauptseite (500) einen Randbereich (52) und einen Kontaktbereich (54) aufweist, mit einer Verbindungseinrichtung (3), die mit einer Kontaktfläche (540) des Kontaktbereiches (54) elektrisch leitend verbunden ist, und mit einer Wärmeleiteinrichtung (4), die eine elektrisch isolierende, thermisch hoch leitfähige Verbindung zwischen der Verbindungseinrichtung (3) und dem Substrat (2) ausbildet, wobei die Verbindungseinrichtung (3) einerseits ausgebildet ist als eine elektrisch leitfähige, metallische Folie (320) und die Wärmeleiteinrichtung (4) ausgebildet ist als ein starrer Isolationsformkörper (42) mit einer ersten und dieser gegenüberliegenden zweiten Kontaktfläche oder wobei die Verbindungseinrichtung (3) andererseits ausgebildet ist als ein Bonddraht (34) oder als ein starrer Metallformkörper (30), wobei ein erster Isolationsstoff (80) am Rand (50) und teilweise auch an einem anschließenden Abschnitt des Randbereichs (52) des Leistungshalbleiterbauelements (5) angeordnet ist und die Wärmeleiteinrichtung (4) ausgebildet ist als ein zweiter, elastischer, vorzugsweise gelartiger, während seiner Anordnung zähflüssiger, Isolationsstoff (40), wobei der zweite Isolationsstoff (40) an den ersten Isolationsstoff (80) angrenzend oder von diesem beabstandet angeordnet ist.Power electronic switching device (1) with a substrate (2) having a normal direction (N) with a first and a second conductor track (22, 24), a power semiconductor component (5) on the first conductor track (22) by means of an electrically conductive connection (900 ) is arranged, the power semiconductor component 5 having a laterally circumferential edge (50) and, on its first main side (500) facing away from the substrate (2), an edge region (52) and a contact region (54), with a connecting device (3), which is electrically conductively connected to a contact surface (540) of the contact area (54), and to a heat-conducting device (4), which forms an electrically insulating, thermally highly conductive connection between the connecting device (3) and the substrate (2), the On the one hand, the connecting device (3) is designed as an electrically conductive, metallic foil (320) and the heat-conducting device (4) is designed as a rigid insulating molded body (42) with a first and second contact surface opposite it, or the connecting device (3) is designed on the other hand as a bonding wire (34) or as a rigid metal molding (30), a first insulating material (80) being arranged on the edge (50) and partly also on an adjoining section of the edge region (52) of the power semiconductor component (5), and the heat-conducting device ( 4) is designed as a second, elastic, preferably gel-like, insulating material (40) which is viscous during its arrangement, the second insulating material (40) being arranged adjacent to or spaced apart from the first insulating material (80).
Description
Die Erfindung beschreibt eine leistungselektronische Schalteinrichtung mit einem Substrat mit einer ersten und einer zweiten Leiterbahn, wobei auf der ersten Leiterbahn ein Leistungshalbleiterbauelement mittels einer elektrisch leitfähigen Verbindung angeordnet ist, wobei das Leistungshalbleiterbauelement einen seitlich umlaufenden Rand und auf seiner ersten, dem Substrat abgewandten Hauptseite einen Randbereich und einen Kontaktbereich aufweist, mit einer Verbindungseinrichtung, die mit einer Kontaktfläche des Kontaktbereichs elektrisch leitend verbunden ist, und mit einer Wärmeleiteinrichtung. Die Erfindung beschreibt ebenso ein Verfahren zur Herstellung einer derartigen Schalteinrichtung.The invention describes a power electronic switching device with a substrate with a first and a second conductor track, a power semiconductor component being arranged on the first conductor track by means of an electrically conductive connection, the power semiconductor component having a laterally circumferential edge and an edge region on its first main side facing away from the substrate and has a contact area, with a connecting device which is electrically conductively connected to a contact surface of the contact area, and with a heat-conducting device. The invention also describes a method for producing such a switching device.
Eine regelmäßige Anforderung an leistungselektronische Schalteinrichtungen und Leistungshalbleitermodule, die hiermit ausgebildet werden, ist, dass alle Komponenten, die sich im Betrieb erwärmen oder erwärmt werden, ausreichend, also insbesondere ohne negativen Einfluss auf die Lebensdauer und die Leistungsfähigkeit, gekühlt werden.A regular requirement for power electronic switching devices and power semiconductor modules that are designed with this is that all components that heat up or are heated up during operation are cooled sufficiently, i.e. in particular without a negative influence on the service life and performance.
Die
Die
Die US 2008 / 0 042 142 A1 offenbart eine Bedeckung einer äußeren Oberfläche eines Halbleiterbauelements mit großer Bandlücke mit einer synthetischen Polymerverbindung. Die synthetische Polymerverbindung wird durch Verbinden einer Vielzahl von dritten Organosiliciumpolymeren durch kovalente Bindung gebildet, die durch Additionsreaktion gebildet wird, und weist eine dreidimensionale Struktur auf. Die dritten Organosiliciumpolymere werden erhalten, indem man eine oder mehrere Arten von ersten Organosiliciumpolymeren mit einer durch Siloxanbindungen (Si-O-Si-Bindungen) gebildeten Brückenstruktur mit einer oder mehreren Arten von zweiten Organosiliciumpolymeren mit einer durch Siloxanbindungen gebildeten linearen Struktur verbindet. Isolierende feine Keramikteilchen mit hoher Wärmeleitfähigkeit können mit der synthetischen Polymerverbindung vermischt werden.US 2008/0 042 142 A1 discloses covering an outer surface of a large bandgap semiconductor component with a synthetic polymer compound. The synthetic polymer compound is formed by connecting a plurality of third organosilicon polymers through covalent bonding formed by addition reaction and has a three-dimensional structure. The third organosilicon polymers are obtained by combining one or more types of first organosilicon polymers having a bridging structure formed by siloxane bonds (Si-O-Si bonds) with one or more types of second organosilicon polymers having a linear structure formed by siloxane bonds. Insulating fine ceramic particles with high thermal conductivity can be mixed with the synthetic polymer compound.
Der Erfindung liegt die Aufgabe zugrunde, die Kühlung der internen Verbindungseinrichtung einer leistungselektronischen Schalteinrichtung, insbesondere in der unmittelbaren Nähe eines Leistungshalbleiterbauelements, zu verbessern und ein Verfahren zur Herstellung einer derartigen leistungselektronischen Schalteinrichtung anzugeben.The invention is based on the object of improving the cooling of the internal connection device of a power electronic switching device, in particular in the immediate vicinity of a power semiconductor component, and of specifying a method for producing such a power electronic switching device.
Diese Aufgabe wird erfindungsgemäß gelöst durch eine leistungselektronische Schalteinrichtung mit einem eine Normalenrichtung aufweisenden Substrat mit einer ersten und einer zweiten Leiterbahn, wobei auf der ersten Leiterbahn ein Leistungshalbleiterbauelement mittels einer elektrisch leitfähigen Verbindung angeordnet ist, wobei das Leistungshalbleiterbauelement einen seitlich umlaufenden Rand und auf seiner ersten, dem Substrat abgewandten Hauptseite einen Randbereich und einen Kontaktbereich aufweist, mit einer Verbindungseinrichtung, die mit einer Kontaktfläche des Kontaktbereichs elektrisch leitend verbunden ist, und mit einer Wärmeleiteinrichtung, die eine elektrisch isolierende, thermisch hoch leitfähige Verbindung zwischen der Verbindungseinrichtung und dem Substrat ausbildet, wobei die Verbindungseinrichtung einerseits ausgebildet ist als eine elektrisch leitfähige, metallische Folie und die Wärmeleiteinrichtung ausgebildet ist als ein starrer Isolationsformkörper mit einer ersten und dieser gegenüberliegenden zweiten Kontaktfläche oder wobei die Verbindungseinrichtung andererseits ausgebildet ist als ein Bonddraht oder als ein starrer Metallformkörper, wobei ein erster Isolationsstoff am Rand und teilweise auch an einem anschließenden Abschnitt des Randbereichs des Leistungshalbleiterbauelements angeordnet ist und die Wärmeleiteinrichtung ausgebildet ist als ein zweiter, elastischer, vorzugsweise gelartiger, während seiner Anordnung zähflüssiger, Isolationsstoff, wobei der zweite Isolationsstoff an den ersten Isolationsstoff angrenzend oder von diesem beabstandet angeordnet ist.This object is achieved according to the invention by a power electronic switching device with a substrate having a normal direction with a first and a second conductor track, a power semiconductor component being arranged on the first conductor track by means of an electrically conductive connection, the power semiconductor component having a laterally circumferential edge and on its first, the main side facing away from the substrate has an edge region and a contact region, with a connecting device which is electrically conductively connected to a contact surface of the contact region, and with a heat-conducting device which forms an electrically insulating, thermally highly conductive connection between the connecting device and the substrate, wherein the On the one hand, the connecting device is designed as an electrically conductive, metallic foil and the heat-conducting device is designed as a rigid insulating molded body with a first and second contact surface opposite it, or the connecting device, on the other hand, is designed as a bonding wire or as a rigid metal molded body, with a first insulating material on the edge and is also partially arranged on an adjoining section of the edge region of the power semiconductor component and the heat-conducting device is designed as a second, elastic, preferably gel-like, insulating material which is viscous during its arrangement, the second insulating material being arranged adjacent to or spaced apart from the first insulating material.
Unter dem Begriff Bonddraht soll auch ein Bondbändchen, insbesondere eines gemäß dem Stand der Technik, verstanden werden.The term bonding wire should also be understood to mean a bonding ribbon, in particular one according to the prior art.
Es kann vorteilhaft sein, wenn die Wärmeleiteinrichtung einen thermisch leitenden Kontakt mit der zweiten Leiterbahn, und vorzugsweise auch mit der ersten Leiterbahn, aufweist.It can be advantageous if the heat-conducting device has a thermally conductive contact with the second conductor track, and preferably also with the first conductor track.
Es kann bevorzugt sein, wenn aus Normalenrichtung betrachtet die Wärmeleiteinrichtung seitlich beabstandet vom Leistungshalbleiterbauelement angeordnet ist.It may be preferred if, viewed from the normal direction, the heat-conducting device is arranged laterally at a distance from the power semiconductor component.
Grundsätzlich kann es bevorzugt sein, wenn die elektrisch leitfähige Folie als Teil eines Folienstapels, alternierend ausgebildet aus elektrisch leitfähigen und mindestens einer elektrisch isolierenden Folie ausgebildet ist.In principle, it can be preferred if the electrically conductive film is formed as part of a film stack, alternately formed from electrically conductive and at least one electrically insulating film.
Hierbei kann der starre Isolationsformkörper eine Dicke aufweisen, die von der des benachbarten Leistungshalbleiterbauelements um nicht mehr als 25%, vorzugsweise nicht mehr als 10% abweicht oder er weist eine Dicke auf, die vom Dreifachen der Dicke des benachbarten Leistungshalbleiterbauelements um nicht mehr als 25%, vorzugsweise nicht mehr als 10% abweicht.Here, the rigid insulating molded body can have a thickness that does not deviate from that of the adjacent power semiconductor component by more than 25%, preferably not more than 10%, or it can have a thickness that does not differ from three times the thickness of the adjacent power semiconductor component by more than 25%. , preferably not more than 10% different.
Der starre Isolationsformkörper weist vorzugsweise eine Wärmeleitfähigkeit von mehr als 100 W/m-K, vorzugsweise von mehr als 140 W/m·K, auf und ist vorzugsweise aus Silizium oder Aluminiumnitrid oder Siliziumkarbid oder Bornitrid oder aus Zinkoxid oder Diamant ausgebildet, oder enthält diese Stoffe zu mehr als 30%, insbesondere mehr als 50%.The rigid insulating molded body preferably has a thermal conductivity of more than 100 W/m-K, preferably more than 140 W/m K, and is preferably made of silicon or aluminum nitride or silicon carbide or boron nitride or of zinc oxide or diamond, or contains these substances more than 30%, especially more than 50%.
Der starre Isolationsformkörper ist weiterhin bevorzugt quaderförmig ausgebildet, wobei vorzugsweise seine größte Längsseite nicht länger ist als das 1 ,5-fache einer größten Längsseite des benachbarten Leistungshalbleiterbauelements.The rigid insulating molded body is further preferably designed in the shape of a cuboid, with its largest longitudinal side preferably not being longer than 1.5 times the largest longitudinal side of the adjacent power semiconductor component.
Der zweite Isolationsstoff weist vorzugsweise eine Wärmeleitfähigkeit von mehr als 2,5 W/m.K, vorzugsweise von mehr als 5 W/m.K, auf und ist vorzugsweise aus einem Silikongel mit partikelförmigen Beimengungen aus Aluminiumnitrid oder Siliziumkarbid oder Bornitrid oder Zinkoxid oder Diamant ausgebildet.The second insulation material preferably has a thermal conductivity of more than 2.5 W/m.K, preferably more than 5 W/m.K, and is preferably formed from a silicone gel with particulate admixtures of aluminum nitride or silicon carbide or boron nitride or zinc oxide or diamond.
Durch die beschriebene Ausgestaltung und ihrer Varianten wird die Kühlung der internen Verbindungseinrichtung der leistungselektronischen Schalteinrichtung, insbesondere in der unmittelbaren Nähe eines Leistungshalbleiterbauelements erheblich verbessert und damit entweder die Stromtragfähigkeit gesteigert oder die Belastung reduziert und somit die Lebensdauer der leistungselektronischen Schalteinrichtung gesteigert.The described configuration and its variants significantly improve the cooling of the internal connection device of the power electronic switching device, especially in the immediate vicinity of a power semiconductor component, and thus either increase the current carrying capacity or reduce the load and thus increase the service life of the power electronic switching device.
Die Aufgabe wird weiterhin gelöst durch ein Verfahren zur Herstellung einer leistungselektronischen Schalteinrichtung nach einem der vorhergehenden Ansprüche mit den Verfahrensschritten, in der Reihenfolge a-b-c-d-e oder a-b-d-c-e:
- a) Bereitstellen des Substrats;
- b) Anordnen des Leistungshalbleiterbauelements und der Wärmeleiteinrichtung, ausgebildet als ein starrer Isolationsformkörper;
- c) Ausbilden einer stoffschlüssigen Verbindung des Leistungshalbleiterbauelements mit einer zugeordneten Leiterbahn des Substrats und der Wärmeleiteinrichtung mit einer zugeordneten Leiterbahn des Substrats;
- d) Anordnen der Verbindungseinrichtung;
- e) Ausbilden jeweils einer kraft- oder stoffschlüssigen Verbindung des Leistungshalbleiterbauelements und der Wärmeleiteinrichtung jeweils mit der Verbindungseinrichtung.
- a) providing the substrate;
- b) arranging the power semiconductor component and the heat-conducting device, designed as a rigid insulating molded body;
- c) forming a cohesive connection of the power semiconductor component with an associated conductor track of the substrate and the heat-conducting device with an associated conductor track of the substrate;
- d) arranging the connection device;
- e) Forming a force-fitting or cohesive connection between the power semiconductor component and the heat-conducting device with the connecting device.
Es kann vorteilhaft sein, wenn vor dem Verfahrensschritt d) folgender Verfahrensschritt ausgeführt wird: Anordnen eines ersten gelartigen Isolationsstoffs auf dem Randbereich des Leistungshalbleiterbauelements.It can be advantageous if the following process step is carried out before process step d): Arranging a first gel-like insulating material on the edge region of the power semiconductor component.
Selbstverständlich können, sofern dies nicht per se oder explizit ausgeschlossen ist, die im Singular genannten Merkmale, insbesondere die Wärmeleiteinrichtung oder das Leistungshalbleiterbauelement, auch mehrfach in der erfindungsgemäßen leistungselektronischen Schalteinrichtung vorhanden sein.Of course, unless this is excluded per se or explicitly, the features mentioned in the singular, in particular the heat-conducting device or the power semiconductor component, can also be present multiple times in the power electronic switching device according to the invention.
Es versteht sich, dass die verschiedenen Ausgestaltungen der Erfindung, gleichgültig ob sie im Rahmen der Beschreibung der leistungselektronischen Schalteinrichtung oder des Verfahrens zu ihrer Herstellung offenbart sind, einzeln oder in beliebigen Kombinationen realisiert sein können, um Verbesserungen zu erreichen. Insbesondere sind die vorstehend und im Folgenden genannten und erläuterten Merkmale nicht nur in den angegebenen Kombinationen, sondern auch in anderen Kombinationen oder in Alleinstellung einsetzbar, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the various embodiments of the invention, regardless of whether they are disclosed in the description of the power electronic switching device or the method for producing it, can be implemented individually or in any combinations in order to achieve improvements. In particular, the features mentioned and explained above and below can be used not only in the specified combinations, but also in other combinations or on their own, without departing from the scope of the present invention.
Weitere Erläuterungen der Erfindung, vorteilhafte Einzelheiten und Merkmale, ergeben sich aus der nachfolgenden Beschreibung der in den
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1 zeigt eine seitliche Ansicht einer leistungselektronischen Schalteinrichtung nach dem Stand der Technik. -
2 bis7 zeigen in seitlicher Ansicht jeweils eine erfindungsgemäße Ausgestaltung einer leistungselektronischen Schalteinrichtung. -
8 zeigt zur weiteren Erläuterung eine Draufsicht auf ein beispielhaftes Leistungshalbleiterbauelement. -
9 zeigt in Draufsicht eine Anordnung analog6 .
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1 shows a side view of a power electronic switching device according to the prior art. -
2 until7 show a side view of an embodiment of a power electronic switching device according to the invention. -
8th For further explanation, shows a top view of an exemplary power semiconductor component. -
9 shows an analogous arrangement inplan view 6 .
Das Leistungshalbleiterbauelement 5, genauer eine seiner dem Substrat 2 in dessen Normalenrichtung N abgewandten Kontaktflächen, ist mit einer zweiten Leiterbahn 24 des Substrats 2 mittels einer Verbindungseinrichtung 3 verbunden. Diese Verbindungseinrichtung 3 ist ausgebildet als ein Folienverbund 32 aus einer, dem Substrat 2 zugewandten, ersten elektrisch leitfähigen Folie 320, einer im Folienverbund folgenden elektrisch isolierenden Folie 322 und einer im Folienverbund weiter folgenden zweiten elektrisch leitfähigen Folie 324.The
Die leistungselektronische Schalteinrichtung 1 weist weiterhin Anschlusselemente 6, hier dargestellt als ein Hilfsanschlusselement zur Führung von Hilfspotentialen, wie beispielhaft Sensor- oder Ansteuersignalen, aber auch nicht dargestellte Lastanschlusselemente auf. Dieses dargestellte Anschlusselement 6 ist ausgebildet als ein fachübliches Press-Pin-Kontaktelement. Der Fuß dieses Anschlusselements 8 ist in einer Hülse angeordnet, die eine stoffschlüssige Verbindung zu einem Kontaktabschnitt auf der dem Substrat 2 abgewandten Oberfläche der ersten elektrisch leitfähigen Folie 320 aufweist. Fachüblich können die Anschlusselemente auch direkt auf einer der Leiterbahnen angeordnet sein. Das Anschlusselement reicht hier durch ein Gehäuse 7 eines Leistungshalbleitermoduls nach außen und bildet die externe Verbindung der leistungselektronischen Schalteinrichtung 1 im Inneren des Leistungshalbleitermoduls.The power electronic switching device 1 also has
Die erste elektrisch leitfähige Folie 320 ist mit der zweiten Leiterbahn 24 des Substrats 2 mittels einer stoffschlüssigen und elektrisch leitfähigen Verbindung 900, hier ausgebildet als fachübliche Drucksinterverbindung, verbunden.The first electrically
Erfindungsgemäß ist eine Wärmeleiteinrichtung 4, die hier als ein zweiter Isolationsstoff 40 ausgebildet ist, zwischen der Verbindungseinrichtung 3 und dem Substrat 2 angeordnet. Selbstverständlich steht dieser zweite Isolationsstoff 40 hier in thermisch leitendem Kontakt mit beiden. Dieser zweite Isolationsstoff 40 weist eine Wärmeleitfähigkeit von ca. 10 W/m.K auf und ist ausgebildet aus einem Silikongel mit partikelförmigen Beimengungen, hier Beimengungen aus Siliziumkarbid.According to the invention, a heat-conducting device 4, which is designed here as a second insulating material 40, is arranged between the connecting device 3 and the
Der zweite Isolationsstoff 40 wird bei der Herstellung nach dem ersten Isolationsstoff 80 angeordnet und überlappt dessen Oberfläche teilweise. Beide Isolationsstoffe 40,80 sind bei ihrer Anordnung zähflüssig und vernetzen nach ihrer Anordnung thermisch oder vorzugsweise optisch mittels UV-Licht zu ihrem gelartigen Endzustand. During production, the second insulation material 40 is arranged after the
Der starre Isolationsformkörper 42 ist mittels seiner ersten und dieser gegenüberliegenden zweiten Kontaktfläche sowohl mit der Verbindungseinrichtung 3 wie auch mit der ersten Leiterbahn 22 stoffschlüssig und thermisch leitend verbunden. Die jeweilige Verbindung 900 ist hier als Lotverbindung ausgebildet. Bei dieser Ausgestaltung besteht, im Gegensatz zur Ausgestaltung gemäß
Der starre Isolationsformkörper 42 dieses Ausführungsbeispiels weist eine Dicke auf, die dem dreifachen der Dicke des benachbarten Leistungshalbleiterbauelements 5 entspricht. Somit wird ein hervorragender Kompromiss aus dem Abstand der Verbindungseinrichtung 3 von der ersten Leiterbahn 22 und dem Wirkungsgrad der Wärmeableitung aus dieser Verbindungseinrichtung 3 erreicht.The rigid insulating molded body 42 of this exemplary embodiment has a thickness that corresponds to three times the thickness of the adjacent
Die Wärmeleiteinrichtung 4 ist wiederum ausgebildet als ein zweiter, elastischer, während seiner Anordnung zähflüssiger Isolationsstoff 40, der hier eine thermisch hoch leitfähige, aber elektrisch isolierende Verbindung zwischen der Verbindungseinrichtung 3, hier deren erster elektrisch leitfähigen Folie 320, und der ersten und zweiten Leiterbahn 22,24 und damit dem Substrat 2 ausbildet.The heat-conducting device 4 is in turn designed as a second, elastic, viscous insulation material 40 during its arrangement, which here provides a thermally highly conductive but electrically insulating connection between the connecting device 3, here its first electrically
Auch hier weist der starre Isolationsformkörper 42 eine Dicke auf, die ca. dem dreifachen der Dicke des benachbarten Leistungshalbleiterbauelements 5 entspricht.Here too, the rigid insulating molded body 42 has a thickness that corresponds to approximately three times the thickness of the adjacent
Die Wärmeleiteinrichtung 4 ist wiederum als ein starrer Isolationsformkörper 42 mit einer ersten und dieser gegenüberliegenden zweiten Kontaktfläche ausgebildet und weist hier eine Dicke auf, die derjenigen des benachbarten Leistungshalbleiterbauelements 5 entspricht. Der starre Isolationsformkörper 42 ist hier ausschließlich mit der zweiten Leiterbahn 24 des Substrats 2 und mit der Verbindungseinrichtung 3 thermisch leitend verbunden. Die jeweilige Verbindung 900 ist wiederum als Drucksinterverbindung ausgebildet. Alternativ kann zumindest eine der beiden Verbindungen auch als kraftschlüssige Verbindung ausgebildet sein. Hierbei würde ein gestrichelt dargestellter Druckkörper 70 aus der Normalenrichtung N auf die Verbindungseinrichtung 3 drücken und somit die kraftschlüssige Verbindung ausbilden.The heat conducting device 4 is in turn designed as a rigid insulating molded body 42 with a first and second contact surface opposite this and here has a thickness that corresponds to that of the adjacent
Zudem überlappt hier der zweite Isolationsstoff 40 nicht nur den ersten Isolationsstoff 80, sondern in Projektion betrachtet auch das Leistungshalbleiterbauelement 5 und ist somit, wiederum in Projektion, also aus Normalenrichtung N betrachtet, nicht wie in den bisher dargestellten Ausführungsbeispielen von diesem lateral, also seitlich beabstandet.In addition, here the second insulating material 40 not only overlaps the first insulating
Im Randbereich 52 und umgeben um den Kontaktbereich 54 des Leistungshalbleiterbauelements 5 ist dessen Randstruktur dargestellt. Der Randbereich 52 und damit auch diese Randstruktur wird bevorzugt zumindest teilweise von dem ersten Isolationsstoff 80, vgl.
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JP2005276968A (en) | 2004-03-24 | 2005-10-06 | Mitsubishi Electric Corp | Power semiconductor device |
US20080042142A1 (en) | 2005-01-27 | 2008-02-21 | The Kansai Electric Power Co., Inc. | Highly Heat-Resistant Synthetic Polymer Compound and High Withstand Voltage Semiconductor Device |
DE102015116165A1 (en) | 2015-09-24 | 2017-03-30 | Semikron Elektronik Gmbh & Co. Kg | Method for producing a power electronic switching device and power electronic switching device |
-
2020
- 2020-10-20 DE DE102020127606.0A patent/DE102020127606B4/en active Active
-
2021
- 2021-10-19 CN CN202111214252.0A patent/CN114388456A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005276968A (en) | 2004-03-24 | 2005-10-06 | Mitsubishi Electric Corp | Power semiconductor device |
US20080042142A1 (en) | 2005-01-27 | 2008-02-21 | The Kansai Electric Power Co., Inc. | Highly Heat-Resistant Synthetic Polymer Compound and High Withstand Voltage Semiconductor Device |
DE102015116165A1 (en) | 2015-09-24 | 2017-03-30 | Semikron Elektronik Gmbh & Co. Kg | Method for producing a power electronic switching device and power electronic switching device |
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CN114388456A (en) | 2022-04-22 |
DE102020127606A1 (en) | 2022-04-21 |
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