DE102015211843A1 - Electronic component and method for producing an electronic component - Google Patents

Electronic component and method for producing an electronic component Download PDF

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Publication number
DE102015211843A1
DE102015211843A1 DE102015211843.6A DE102015211843A DE102015211843A1 DE 102015211843 A1 DE102015211843 A1 DE 102015211843A1 DE 102015211843 A DE102015211843 A DE 102015211843A DE 102015211843 A1 DE102015211843 A1 DE 102015211843A1
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Germany
Prior art keywords
electronic component
circuit board
printed circuit
bonding
bonding surface
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DE102015211843.6A
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German (de)
Inventor
Karin Beart
Frank Fella
Thomas Schmidt
Bernhard Schuch
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Vitesco Technologies Germany GmbH
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Conti Temic Microelectronic GmbH
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Priority to DE102015211843.6A priority Critical patent/DE102015211843A1/en
Publication of DE102015211843A1 publication Critical patent/DE102015211843A1/en
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    • HELECTRICITY
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    • H01L23/49Arrangements 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 wire-like arrangements or pins or rods
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/30Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/328Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by welding
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Abstract

Die Erfindung betrifft eine elektronische Komponente (E), umfassend eine Leiterplatte (1) mit zumindest einer elektrisch leitenden Leiterbahn (1.1) und zumindest ein elektronisches Bauteil (2), wobei das zumindest eine elektronische Bauteil (2) als ein integriertes elektronisches Bauelement ausgebildet ist. Erfindungsgemäß ist das zumindest eine elektronische Bauteil (2) mittels mindestens eines Aluminium-Dünndrahts (3) elektrisch leitend mit der Leiterplatte (1) verbunden. Die Erfindung betrifft weiterhin ein Verfahren zur Herstellung einer solchen elektronischen Komponente (E).The invention relates to an electronic component (E), comprising a printed circuit board (1) with at least one electrically conductive conductor track (1.1) and at least one electronic component (2), wherein the at least one electronic component (2) is designed as an integrated electronic component , According to the invention, the at least one electronic component (2) is electrically conductively connected to the printed circuit board (1) by means of at least one aluminum thin wire (3). The invention further relates to a method for producing such an electronic component (E).

Description

Die Erfindung betrifft eine elektronische Komponente, umfassend eine Leiterplatte mit zumindest einer elektrisch leitenden Leiterbahn und zumindest ein elektronisches Bauteil, wobei das zumindest eine elektronische Bauteil als ein integriertes elektronisches Bauelement ausgebildet ist. Des Weiteren betrifft die Erfindung ein Verfahren zur Herstellung einer elektronischen Komponente. The invention relates to an electronic component, comprising a printed circuit board with at least one electrically conductive trace and at least one electronic component, wherein the at least one electronic component is designed as an integrated electronic component. Furthermore, the invention relates to a method for producing an electronic component.

Elektronische Komponenten in Form integrierter Schaltungen umfassen üblicherweise elektronische Baugruppen, die auf einer Leiterplatte zu einer elektrischen Schaltungsanordnung zusammengeführt sind. Derartige elektronische Komponenten werden beispielsweise in Steuergeräten für Kraftfahrzeuge, z. B. in Getriebesteuergeräten, eingesetzt. Electronic components in the form of integrated circuits usually comprise electronic assemblies, which are brought together on a printed circuit board to an electrical circuit arrangement. Such electronic components are used for example in control units for motor vehicles, eg. B. in transmission control units used.

Die Baugruppen auf der Leiterplatte können in Form sogenannter Bare Dies oder als gelötete elektronische Bauteile mit einer Kunststoffabdeckung auf der Flachseite der Leiterplatte angeordnet sein. Als Bare Dies werden integrierte elektronische Baugruppen bezeichnet, die ohne Abdeckung weiterverarbeitet werden. Diese elektronischen Baugruppen werden direkt auf der Leiterplatte aufgebracht und mittels elektrischer Verbindungselemente, insbesondere mittels Bonddrähten mit weiteren auf der Leiterplatte angeordneten elektronischen Bauteilen oder Baugruppen verbunden. The assemblies on the circuit board may be arranged in the form of so-called bare dies or as soldered electronic components with a plastic cover on the flat side of the circuit board. Bare Dies are integrated electronic components that are processed without cover. These electronic assemblies are applied directly to the circuit board and connected by means of electrical connection elements, in particular by means of bonding wires with other arranged on the circuit board electronic components or assemblies.

Zur Verbindung der Bonddrähte auf der Leiterplatte kommen zwei verschiedene Drahtbondprozesse zum Einsatz, wobei die Bonddrähte auf eine Bondfläche zur Verbindung der Leiterplatte mit einem Bare Die aufgebracht werden. Beispielsweise wird ein Bonddraht, z. B. ein Dickdraht mit einem Drahtdurchmesser von 125–500 µm aus Aluminium in einem sogenannten Wedge-Wedge-Verfahren aufgebracht. Bei Leistungskomponenten wie bei Metall-Oxid-Halbleiter-Feldeffekttransistoren (= MOSFET) werden Dickdrähte mit einem Drahtdurchmesser größer als 200 µm verwendet, um hohe Ströme zu transportieren. Für kleine Ströme bzw. Signale wird ein Bonddraht, insbesondere ein Dünndraht mit einem Drahtdurchmesser von 20–50 µm aus Gold aufgebracht, beispielsweise bei Logikbauteilen wie integrierten Schaltungen und/oder bei Halbleitern wie Dioden. Two different wire bonding processes are used to connect the bonding wires to the printed circuit board, wherein the bonding wires are applied to a bonding surface for bonding the printed circuit board to a bare die. For example, a bonding wire, for. B. a thick wire with a wire diameter of 125-500 microns of aluminum applied in a so-called wedge-wedge process. For power components such as metal oxide semiconductor field effect transistors (= MOSFET) thick wires with a wire diameter greater than 200 microns are used to transport high currents. For small currents or signals, a bonding wire, in particular a thin wire with a wire diameter of 20-50 microns of gold is applied, for example, in logic components such as integrated circuits and / or semiconductors such as diodes.

Eine Standardmetallisierung der Bondflächen auf Halbleiterkomponenten, insbesondere auf Bare Dies, ist Aluminium. Eine Materialkombination aus beispielsweise Gold-Bonddraht und Aluminium-Bondfläche neigt zur Ausbildung intermetallischer Phasen und damit verbundenen Fehlermechanismen, z. B. der sogenannte Kirkendall-Effekt, Halogen-Korrosion. Zur Verringerung derartiger Fehlermechanismen wird eine sogenannte Over-Pad-Metallisierung (= OPM) aufgebracht, beispielsweise Nickel/Gold (NiAu) oder Nickel/Palladium/Gold (NiPdAu). A standard metallization of the bond pads on semiconductor components, in particular on bare dies, is aluminum. A material combination of, for example, gold bonding wire and aluminum bonding surface tends to form intermetallic phases and associated failure mechanisms, e.g. As the so-called Kirkendall effect, halogen corrosion. To reduce such failure mechanisms, a so-called over-pad metallization (= OPM) is applied, for example nickel / gold (NiAu) or nickel / palladium / gold (NiPdAu).

Der Erfindung liegt die Aufgabe zugrunde, eine gegenüber dem Stand der Technik verbesserte elektronische Komponente und ein verbessertes Verfahren zur Herstellung einer solchen elektronischen Komponente anzugeben. The invention has for its object to provide an improved over the prior art electronic component and an improved method for producing such an electronic component.

Die Aufgabe wird erfindungsgemäß durch die im Anspruch 1 angegebenen Merkmale gelöst. Hinsichtlich des Verfahrens wird die Aufgabe erfindungsgemäß durch die im Anspruch 8 angegebenen Merkmale gelöst. The object is achieved by the features specified in claim 1. With regard to the method, the object is achieved by the features specified in claim 8.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. Advantageous embodiments of the invention are the subject of the dependent claims.

Eine elektronische Komponente umfasst eine Leiterplatte mit zumindest einer elektrisch leitenden Leiterbahn und zumindest ein elektronisches Bauteil, wobei das zumindest eine elektronische Bauteil als ein integriertes elektronisches Bauelement, insbesondere als ein ungehäuster Mikrochip (auch als Bare Die bekannt) ausgebildet ist. An electronic component comprises a printed circuit board with at least one electrically conductive conductor track and at least one electronic component, wherein the at least one electronic component is designed as an integrated electronic component, in particular as an unhoused microchip (also known as bare die).

Erfindungsgemäß ist das zumindest eine elektronische Bauteil mittels mindestens eines Aluminium-Dünndrahts elektrisch leitend mit der Leiterplatte verbunden. According to the invention, the at least one electronic component is electrically conductively connected to the printed circuit board by means of at least one aluminum thin wire.

Dadurch, dass zur elektrischen Kontaktierung des elektronischen Bauteils ein Dünnbonddraht aus Aluminium verwendet wird, kann ein elektronisches Bauteil mit einer kostengünstigen Metallisierung vorzugsweise aus Aluminium verwendet werden. Damit wird in vorteilhafter Art und Weise eine Kostenreduktion der elektronischen Komponente gegenüber dem Stand der Technik erreicht. Eine daraus resultierende Monometallverbindung, zumindest zwischen dem Bonddraht und dem elektronischen Bauteil, ermöglicht zudem die Verringerung eines Risikos zur Ausbildung intermetallischer Phasen und daraus resultierenden Fehlermechanismen, wie beispielweise der sogenannte Kirkendall-Effekt und Halogen-Korrosionsvorgänge. By using a thin-wire aluminum wire to make electrical contact with the electronic component, it is possible to use an electronic component with a cost-effective metallization, preferably of aluminum. Thus, a cost reduction of the electronic component over the prior art is achieved in an advantageous manner. A resulting monometallic compound, at least between the bonding wire and the electronic component, also allows reducing the risk of forming intermetallic phases and resulting failure mechanisms, such as the so-called Kirkendall effect and halogen corrosion processes.

Die elektronische Komponente ist im Rahmen der Erfindung zur Anordnung in einem Steuergerät eines Kraftfahrzeugs, beispielswiese in einem Getriebesteuergerät, vorgesehen. The electronic component is provided in the context of the invention for arrangement in a control unit of a motor vehicle, for example in a transmission control unit.

Zur Befestigung, insbesondere zur Kontaktierung des mindestens einen Aluminium-Dünndrahts weisen die Leiterplatte wenigstens eine erste Bondfläche und das zumindest eine elektronische Bauteil wenigstens eine zweite Bondfläche auf. Die Bondflächen stellen elektrisch leitende Kontaktflächen dar, die mittels bekannter Metallisierungsverfahren aufgebracht werden können. Auf der Leiterplatte ist die Bondfläche elektrisch leitend mit zumindest einer Leiterbahn verbunden. For attachment, in particular for contacting the at least one aluminum thin wire, the printed circuit board has at least one first bonding surface and the at least one electronic component has at least one second bonding surface. The bonding surfaces represent electrically conductive contact surfaces, which by means of known metallization can be applied. On the circuit board, the bonding surface is electrically conductively connected to at least one conductor track.

Gemäß einer Ausgestaltung der Erfindung ist die wenigstens eine zweite Bondfläche auf dem zumindest einen elektronischen Bauteil aus Aluminium gebildet. Daraus ergibt sich der Vorteil einer Monometallverbindung zwischen dem Bonddraht und dem elektronischen Bauteil, wie bereits zuvor erwähnt. Zusätzlich dazu werden Materialkosten eingespart, wobei die wenigstens eine zweite Bondflächen keine weitere Metallisierung, insbesondere eine sogenannte Over-Pad-Metallisierung, z. B. aus Nickel/Palladium/Gold (NiPdAu), benötigt. Eine Standardmetallisierung der Bondflächen, beispielsweise aus Aluminium, ist kostensparend und ausreichend. According to one embodiment of the invention, the at least one second bonding surface is formed on the at least one electronic component made of aluminum. This results in the advantage of a monometallic connection between the bonding wire and the electronic component, as previously mentioned. In addition, material costs are saved, wherein the at least one second bonding surfaces no further metallization, in particular a so-called over-pad metallization, z. B. of nickel / palladium / gold (NiPdAu) needed. A standard metallization of the bonding surfaces, for example made of aluminum, is cost-saving and sufficient.

Gemäß einer weiteren Ausgestaltung der Erfindung ist die wenigstens eine erste Bondfläche auf der Leiterplatte aus Gold gebildet. Zwar entsteht hierbei eine Bimetallverbindung, allerdings ist eine Schichtdicke der Bondfläche derart gering (im Nanometerbereich), dass eine Zuverlässigkeit der elektrischen Verbindung erhalten bleibt. According to a further embodiment of the invention, the at least one first bonding surface on the printed circuit board is formed of gold. Although this results in a bimetallic connection, however, a layer thickness of the bonding surface is so small (in the nanometer range) that a reliability of the electrical connection is maintained.

Darüber hinaus umfasst die Leiterplatte gemäß einem Ausführungsbeispiel einen Trägerkörper, der aus einer Mehrzahl von Schichten gebildet ist. Die Schichten sind beispielsweise Glasfasermatten, die zur adhäsiven Verbindung untereinander mit einem Harz vorimprägniert sind. In addition, according to one embodiment, the printed circuit board comprises a carrier body, which is formed from a plurality of layers. The layers are, for example, glass fiber mats which are pre-impregnated with a resin for adhesive bonding to one another.

Die wenigstens eine erste Bondfläche ist dabei auf einer ersten Schicht des Trägerkörpers angeordnet, wobei die erste Schicht eine Oberflächenseite der Leiterplatte bildet. Zwischen den Schichten können elektrisch leitende Innenlagen angeordnet sein, die beispielsweise analog zu den Leiterbahnen aus Kupfer gebildet sind. Eine elektrische Verbindung der Innenlagen unterschiedlicher Schichten erfolgt z. B. mittels Durchkontaktierungen (auch als „Vias“ oder „Mikrovias“ bekannt). The at least one first bonding surface is arranged on a first layer of the carrier body, wherein the first layer forms a surface side of the printed circuit board. Between the layers electrically conductive inner layers may be arranged, which are formed, for example, analogous to the conductor tracks made of copper. An electrical connection of the inner layers of different layers is z. By means of vias (also known as "vias" or "microvias").

Gemäß einer weiteren Ausgestaltung der Erfindung ist das zumindest eine elektronische Bauteil mittels eines elektrisch leitenden Klebstoffs stoffschlüssig auf der Leiterplatte fixiert. According to a further embodiment of the invention, the at least one electronic component is fixed by means of an electrically conductive adhesive cohesively on the circuit board.

Bei einem Verfahren zur Herstellung der beschriebenen elektronischen Komponente werden die Leiterplatte mit der zumindest einen Leiterbahn und das zumindest eine elektronische Bauteil bereitgestellt und mittels des zumindest einen Aluminium-Dünndrahts elektrisch leitend miteinander verbunden. In a method for producing the described electronic component, the printed circuit board with the at least one printed conductor and the at least one electronic component are provided and electrically conductively connected to one another by means of the at least one aluminum thin wire.

Mittels der Verwendung eines Aluminium-Dünndrahts als Bonddraht kann auf sogenannte Over-Pad-Metallisierungen auf der Seite des elektronischen Bauteils verzichtet werden. Damit ist eine Herstellung der elektronischen Komponente gegenüber dem Stand der Technik kostengünstiger und zeiteffizienter. By using an aluminum thin wire as a bonding wire can be dispensed so-called over-pad metallizations on the side of the electronic component. Thus, a production of the electronic component over the prior art is cheaper and more time efficient.

Eine Ausgestaltung der Erfindung sieht hierbei vor, dass zur Befestigung des mindestens einen Aluminium-Dünndrahts auf die Leiterplatte wenigstens eine erste Bondfläche und auf das zumindest eine elektronische Bauteil wenigstens eine zweite Bondfläche aufgebracht werden, wobei der mindestens eine Aluminium-Dünndraht mittels Drahtbonden mit den Bondflächen verbunden wird. An embodiment of the invention provides that at least one first bonding surface is applied to the at least one aluminum thin wire and at least one second bonding surface is applied to the at least one electronic component, the at least one aluminum thin wire being bonded to the bonding surfaces by wire bonding is connected.

Die oben beschriebenen Eigenschaften, Merkmale und Vorteile dieser Erfindung sowie die Art und Weise, wie diese erreicht werden, werden klarer und deutlicher verständlich im Zusammenhang mit der folgenden Beschreibung von Ausführungsbeispielen, die im Zusammenhang mit der Zeichnung näher erläutert werden. Dabei zeigt: The above-described characteristics, features, and advantages of this invention, as well as the manner in which they will be achieved, will become clearer and more clearly understood in connection with the following description of exemplary embodiments which will be described in connection with the drawings. Showing:

1 schematisch eine Schnittdarstellung eines erfindungsgemäßen Ausführungsbeispiels einer elektronischen Komponente E. 1 schematically a sectional view of an inventive embodiment of an electronic component E.

Die einzige 1 zeigt ein erfindungsgemäßes Ausführungsbeispiel einer elektronischen Komponente E in einer schematischen Schnittdarstellung. The only 1 shows an inventive embodiment of an electronic component E in a schematic sectional view.

Die elektronische Komponente E ist beispielsweise zur Anordnung in einem Steuergerät für ein Kraftfahrzeug, z. B. in einem Getriebesteuergerät, vorgesehen und umfasst eine Leiterplatte 1 als Schaltungsträger. Auf diesem Schaltungsträger ist im vorliegenden Ausführungsbeispiel ein elektronisches Bauteil 2 als Bestandteil einer Schaltung angeordnet. Alternativ kann auch eine Mehrzahl elektronischer Bauteile 2 auf der Leiterplatte 1 angeordnet sein. The electronic component E is for example for arrangement in a control unit for a motor vehicle, for. B. in a transmission control unit, and includes a printed circuit board 1 as a circuit carrier. On this circuit substrate is in the present embodiment, an electronic component 2 arranged as part of a circuit. Alternatively, a plurality of electronic components 2 on the circuit board 1 be arranged.

Die Leiterplatte 1 umfasst einen mehrschichtigen Trägerkörper, welcher eine Mehrzahl von Schichten S1 bis Sn aufweist, die in Richtung einer Hochachse Z übereinander angeordnet sind. Beispielsweise ist jede Schicht S1 bis Sn aus einer Glasfasermatte gebildet, die zur adhäsiven Verbindung mit einer angrenzenden Glasfasermatte mit einem Harz vorimprägniert ist. Derartige Glasfasermatten sind auch als Prepregs bekannt. The circuit board 1 comprises a multilayer carrier body, which has a plurality of layers S1 to Sn, which are arranged one above the other in the direction of a vertical axis Z. For example, each layer S1 to Sn is formed from a fiberglass mat that is pre-impregnated with a resin for adhesive bonding to an adjacent fiberglass mat. Such fiberglass mats are also known as prepregs.

Auf einer oberen, ersten Schicht S1 ist eine elektrisch leitende Leiterbahn 1.1 angeordnet, die beispielsweise aus Kupfer gebildet ist. Die Leiterbahn 1.1 ist beispielsweise durch Ätzprozesse, wie z. B. Kupferätzung, herstellbar. On an upper, first layer S1 is an electrically conductive trace 1.1 arranged, which is formed for example of copper. The conductor track 1.1 is for example by etching processes, such. B. copper etching, produced.

Weiterhin sind in Schichten S2 bis Sn unterhalb der ersten Schicht S1 elektrisch leitende Innenlagen 1.2 angeordnet, die vorzugsweise analog zu den Leiterbahnen 1.1 aus Kupfer gebildet sind und die einer elektrisch leitenden Verbindung der elektronischen Komponente E mit weiteren nicht gezeigten Komponenten und/oder einer elektrischen Verbindung einer auf der Leiterplatte 1 integrierten Schaltung dienen. Die Innenlagen 1.2 sind mittels Durchkontaktierungen 1.3 elektrisch und thermisch leitend miteinander verbunden. Die unterhalb des elektronischen Bauteils 2 angeordnete Leiterbahn 1.1, welche alternativ auch mehrere Leiterbahnen 1.1 repräsentieren kann, ist mittels einer Mehrzahl von Mikrovias 1.4 mit einer ersten Innenlage 1.2 unterhalb der ersten Schicht S1 elektrisch und thermisch leitend verbunden. Im gezeigten Ausführungsbeispiel ist diese erste Innenlage 1.2 weiterhin mit einer Rückseite R der Leiterplatte 1 mittels vier Durchkontaktierungen 1.3 elektrisch und thermisch leitend verbunden, wobei die Rückseite R ebenfalls Mikrovias 1.4 ausbildet. Furthermore, layers S1 to Sn below the first layer S1 have electrically conductive inner layers 1.2 arranged, preferably analogous to the conductor tracks 1.1 are made of copper and that of an electrically conductive connection of the electronic component E with further components (not shown) and / or an electrical connection on the printed circuit board 1 serve integrated circuit. The inner layers 1.2 are by means of vias 1.3 connected electrically and thermally conductive. The below the electronic component 2 arranged conductor track 1.1 , which alternatively also several tracks 1.1 can be represented by a plurality of microvias 1.4 with a first inner layer 1.2 electrically and thermally conductively connected below the first layer S1. In the illustrated embodiment, this first inner layer 1.2 furthermore with a rear side R of the printed circuit board 1 by means of four vias 1.3 electrically and thermally conductively connected, the back R also microvias 1.4 formed.

Im vorliegenden Ausführungsbeispiel sind die Durchkontaktierungen 1.3 und die Mikrovias 1.4 als Bohrungen im Substrat der Leiterplatte 1 ausgebildet, die jeweils eine elektrisch leitende Innenbeschichtung aufweisen. Die Mikrovias 1.4 sind im Durchmesser kleiner ausgebildet als die Durchkontaktierungen 1.3. In the present embodiment, the vias 1.3 and the microvias 1.4 as holes in the substrate of the circuit board 1 formed, each having an electrically conductive inner coating. The microvias 1.4 are smaller in diameter than the vias 1.3 ,

Die auf der ersten Schicht S1 angeordneten Leiterbahnen 1.1 dienen der elektrischen Verbindung des gezeigten elektronischen Bauteils 2. The conductor tracks arranged on the first layer S1 1.1 serve the electrical connection of the electronic component shown 2 ,

Das elektronische Bauteil 2 stellt im vorliegenden Ausführungsbeispiel eine ungehäuste, integrierte elektronische Halbleiterkomponente, z. B. ein Mikrochip (auch als Bare Die bekannt), dar. The electronic component 2 represents in the present embodiment, an unhoused, integrated electronic semiconductor component, for. As a microchip (also known as bare die), is.

Das elektronische Bauteil 2 ist auf einer Leiterbahn 1.1 angeordnet und mit dieser stoffschlüssig und elektrisch leitend verbunden, z. B. adhäsiv mittels eines elektrisch leitfähigen Klebstoffs K. The electronic component 2 is on a track 1.1 arranged and connected to this cohesively and electrically conductive, z. B. adhesively by means of an electrically conductive adhesive K.

Das elektronische Bauteil 2 ist mittels jeweils eines Aluminium-Dünndrahts 3 elektrisch leitend mit einer auf der Leiterplatte 1 ausgebildeten ersten Bondfläche 1.5 (auch als Bondpad bekannt) verbunden, wobei die ersten Bondflächen 1.5 jeweils elektrisch leitend mit einer nicht gezeigten Leiterbahn verbunden sind bzw. auf diesen aufgebracht sind. The electronic component 2 is by means of one aluminum thin wire each 3 electrically conductive with a on the circuit board 1 formed first bonding surface 1.5 (also known as bonding pad), wherein the first bonding surfaces 1.5 each electrically connected to a printed circuit, not shown, or are applied thereto.

Das elektronische Bauteil 2 weist hierbei zwei zweite Bondflächen 2.1 zur Kontaktierung der Aluminium-Dünndrähte 3 am elektronischen Bauteil 2 auf. Die zweiten Bondflächen 2.1 sind jeweils aus Aluminium oder einer Aluminiumlegierung gebildet, so dass zwischen den Aluminium-Dünndrähten 3 und den zweiten Bondflächen 2.1 jeweils eine Monometallverbindung entsteht. The electronic component 2 here has two second bonding surfaces 2.1 for contacting the aluminum thin wires 3 on the electronic component 2 on. The second bonding surfaces 2.1 are each formed of aluminum or an aluminum alloy, so that between the aluminum thin wires 3 and the second bonding surfaces 2.1 in each case a monometallic compound is formed.

Damit ist eine Verbindung zwischen den Aluminium-Dünndrähten 3 und den zweiten Bondflächen 2.1 besonders robust und zuverlässig ausgebildet, wobei intermetallische Phasen, Korrosionsvorgänge und der sogenannte Kirkendall-Effekt gegenüber Bimetallverbindungen zuverlässig verhindert werden können. This is a connection between the aluminum thin wires 3 and the second bonding surfaces 2.1 designed particularly robust and reliable, with intermetallic phases, corrosion processes and the so-called Kirkendall effect against bimetallic compounds can be reliably prevented.

Weiterhin ermöglicht eine derartige Monometallverbindung eine Kostenreduzierung bei der Herstellung der elektronischen Bauteile 2, da hierbei keine kostenintensive, zusätzliche Metallisierungsschicht erforderlich ist, wie es beispielsweise bei Gold-Bonddrähten und Aluminium-Bondflächen der Fall ist. Furthermore, such a monometallic compound enables a cost reduction in the manufacture of the electronic components 2 because this does not require a costly, additional metallization layer, as is the case, for example, with gold bonding wires and aluminum bonding surfaces.

Die ersten Bondflächen 1.5 auf der Leiterplatte 1 sind beispielsweise aus Gold mit einer Schichtdicke im Nanometerbereich ausgebildet. Hierbei ist zwar zwischen dem Aluminium-Dünndraht 3 und der ersten Bondfläche 1.5 aus Gold eine Bimetallverbindung hergestellt, allerdings bleibt eine Zuverlässigkeit der Verbindung aufgrund der geringen Schichtdicke des Golds erhalten. The first bonding surfaces 1.5 on the circuit board 1 are formed, for example, of gold with a layer thickness in the nanometer range. Although this is between the aluminum thin wire 3 and the first bonding surface 1.5 made of gold, a bimetallic compound, however, a reliability of the compound is retained due to the small layer thickness of the gold.

Zum Schutz der elektronischen Komponente E vor äußeren Einflüssen im Betrieb der elektronischen Komponente E, z. B. vor korrosiven Medien, wie z. B. Getriebeölen, vor Spänen und/oder Schadgasen etc., ist eine Kapselung 4 angeordnet, welche in Form eines Gehäuses (Molding) oder als ein Verguss mit Sil-Gel die erste Schicht S1 der Leiterplatte 1 sowie alle darauf angeordneten Komponenten, d. h. in Bezug auf das vorliegende Ausführungsbeispiel: das elektronische Bauteil 2 und die Aluminium-Dünndrähte 3, form- und stoffschlüssig umgibt. To protect the electronic component E against external influences during operation of the electronic component E, z. B. against corrosive media such. As transmission oils, before chips and / or harmful gases, etc., is an encapsulation 4 arranged, which in the form of a housing (molding) or as a casting with Sil gel, the first layer S1 of the circuit board 1 as well as all components arranged thereon, ie with respect to the present embodiment: the electronic component 2 and the aluminum thin wires 3 , surrounds positive and cohesive.

Die Kapselung 4 ist aus einem elektrisch isolierenden Material, z. B. einem Duroplast oder einem vibrationsdämpfenden Sil-Gel, gebildet, welches mittels Spritzpressen (Transfer-Molding) oder Formpressen (Compression-Molding) auf die Leiterplatte 1 aufgebracht wird. The encapsulation 4 is made of an electrically insulating material, for. As a thermoset or a vibration-damping Sil gel, formed by means of transfer molding (transfer molding) or compression molding (compression molding) on the circuit board 1 is applied.

Die in diesem Ausführungsbeispiel beschriebene elektronische Komponente E kann in sämtlichen Bereichen mit hohen Temperatur- und/oder Bauraumanforderungen und/oder hoher Korrosionsgefahr eingesetzt werden. The electronic component E described in this embodiment can be used in all areas with high temperature and / or space requirements and / or high risk of corrosion.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1 1
Leiterplatte circuit board
1.1 1.1
Leiterbahn conductor path
1.2 1.2
Innenlage inner layer
1.3 1.3
Durchkontaktierung via
1.4 1.4
Mikrovia microvia
1.5 1.5
erste Bondfläche first bonding surface
2 2
elektronisches Bauteil electronic component
2.1 2.1
zweite Bondfläche second bond area
3 3
Aluminium-Dünndraht Aluminum thin wire
4 4
Kapselung encapsulation
E e
elektronische Komponente electronic component
S1 S1
erste Schicht first shift
S2 bis Sn S2 to Sn
Schicht layer
K K
Klebstoff adhesive
R R
Rückseite back
z z
Hochachse vertical axis

Claims (9)

Elektronische Komponente (E), umfassend eine Leiterplatte (1) mit zumindest einer elektrisch leitenden Leiterbahn (1.1) und zumindest ein elektronisches Bauteil (2), wobei das zumindest eine elektronische Bauteil (2) als ein integriertes elektronisches Bauelement ausgebildet ist, dadurch gekennzeichnet, dass das zumindest eine elektronische Bauteil (2) mittels mindestens eines Aluminium-Dünndrahts (3) elektrisch leitend mit der Leiterplatte (1) verbunden ist. Electronic component (E) comprising a printed circuit board ( 1 ) with at least one electrically conductive conductor track ( 1.1 ) and at least one electronic component ( 2 ), wherein the at least one electronic component ( 2 ) is formed as an integrated electronic component, characterized in that the at least one electronic component ( 2 ) by means of at least one aluminum thin wire ( 3 ) electrically conductive with the circuit board ( 1 ) connected is. Elektronische Komponente (E) nach Anspruch 1, dadurch gekennzeichnet, dass zur Befestigung des mindestens einen Aluminium-Dünndrahts (3) die Leiterplatte (1) wenigstens eine erste Bondfläche (1.5) und das zumindest eine elektronische Bauteil (2) wenigstens eine zweite Bondfläche (2.1 aufweisen. Electronic component (E) according to claim 1, characterized in that for fixing the at least one aluminum thin wire ( 3 ) the printed circuit board ( 1 ) at least a first bonding surface ( 1.5 ) and the at least one electronic component ( 2 ) at least one second bonding surface ( 2.1 exhibit. Elektronische Komponente (E) nach Anspruch 2, dadurch gekennzeichnet, dass die wenigstens eine zweite Bondfläche (2.1) auf dem zumindest einen elektronischen Bauteil (2) aus Aluminium gebildet ist. Electronic component (E) according to claim 2, characterized in that the at least one second bonding surface ( 2.1 ) on the at least one electronic component ( 2 ) is formed of aluminum. Elektronische Komponente (E) nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die wenigstens eine erste Bondfläche (1.5) auf der Leiterplatte (1) aus Gold gebildet ist. Electronic component (E) according to claim 2 or 3, characterized in that the at least one first bonding surface ( 1.5 ) on the printed circuit board ( 1 ) is formed of gold. Elektronische Komponente (E) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Leiterplatte (1) einen Trägerkörper umfasst, der aus einer Mehrzahl von Schichten (S1 bis Sn) gebildet ist. Electronic component (E) according to one of the preceding claims, characterized in that the printed circuit board ( 1 ) comprises a carrier body formed of a plurality of layers (S1 to Sn). Elektronische Komponente (E) nach Anspruch 5, dadurch gekennzeichnet, dass die wenigstens eine Bondfläche (1.5) der Leiterplatte (1) auf einer ersten Schicht (S1) des Trägerkörpers angeordnet ist, wobei die erste Schicht (S1) eine dem zumindest einen elektronischen Bauteil (2) zugewandte Oberflächenseite der Leiterplatte (1) bildet. Electronic component (E) according to claim 5, characterized in that the at least one bonding surface ( 1.5 ) of the printed circuit board ( 1 ) is arranged on a first layer (S1) of the carrier body, wherein the first layer (S1) forms a the at least one electronic component ( 2 ) facing surface side of the circuit board ( 1 ). Elektronische Komponente (E) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das zumindest eine elektronische Bauteil (2) mittels eines elektrisch leitfähigen Klebstoffs (K) stoffschlüssig auf der Leiterplatte (1) fixiert ist. Electronic component (E) according to one of the preceding claims, characterized in that the at least one electronic component ( 2 ) by means of an electrically conductive adhesive (K) cohesively on the circuit board ( 1 ) is fixed. Verfahren zur Herstellung einer elektronischen Komponente (E) nach einem der vorhergehenden Ansprüche, wobei – die Leiterplatte (1) mit der zumindest einen elektrisch leitenden Leiterbahn (1.1) und das zumindest eine elektronische Bauteil (2) bereitgestellt werden, und – das zumindest eine elektronische Bauteil (2) mittels des zumindest einen Aluminium-Dünndrahts (3) elektrisch leitend mit der zumindest einen Leiterplatte (1) verbunden wird. Method for producing an electronic component (E) according to one of the preceding claims, wherein - the printed circuit board ( 1 ) with the at least one electrically conductive conductor track ( 1.1 ) and the at least one electronic component ( 2 ), and - the at least one electronic component ( 2 ) by means of the at least one aluminum thin wire ( 3 ) electrically conductive with the at least one printed circuit board ( 1 ) is connected. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass zur Befestigung des mindestens einen Aluminium-Dünndrahts (3) auf die Leiterplatte (1) wenigstens eine erste Bondfläche (1.5) und auf das zumindest eine elektronische Bauteil (2) wenigstens eine zweite Bondfläche (2.1) aufgebracht werden, wobei der mindestens eine Aluminium-Dünndraht (3) mittels Drahtbonden mit den Bondflächen (1.5, 2.1) verbunden wird. A method according to claim 8, characterized in that for fixing the at least one aluminum thin wire ( 3 ) on the printed circuit board ( 1 ) at least a first bonding surface ( 1.5 ) and on the at least one electronic component ( 2 ) at least one second bonding surface ( 2.1 ), wherein the at least one aluminum thin wire ( 3 ) by wire bonding with the bonding surfaces ( 1.5 . 2.1 ) is connected.
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