DE19637285B4 - Semiconductor device and method of assembling the same - Google Patents
Semiconductor device and method of assembling the same Download PDFInfo
- Publication number
- DE19637285B4 DE19637285B4 DE19637285A DE19637285A DE19637285B4 DE 19637285 B4 DE19637285 B4 DE 19637285B4 DE 19637285 A DE19637285 A DE 19637285A DE 19637285 A DE19637285 A DE 19637285A DE 19637285 B4 DE19637285 B4 DE 19637285B4
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- layer
- heat sink
- lead frame
- epoxy resin
- glued
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01L24/01—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
- H01L24/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L24/31—Structure, shape, material or disposition of the layer connectors after the connecting process
- H01L24/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
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- H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
- H01L23/433—Auxiliary members in containers characterised by their shape, e.g. pistons
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Abstract
Halbleiterbauelement mit einem Leiterrahmen (108) und einem mit diesem verklebten Kühlkörper (104), wobei eine erste Schicht (311) aus ausgehärtetem, wärmeleitendem Epoxydharz auf zumindest einem Teil einer ersten der verklebten Flächen des Leiterrahmens (108) oder des Kühlkörpers (104) angeordnet ist und wobei eine weitere Schicht (312) zwischen der zweiten der verklebten Flächen und der ersten Schicht (311) angeordnet ist, dadurch gekennzeichnet, dass die weitere Schicht (312) aus wärmeleitendem und elektrisch isolierendem Thermoplastmaterial besteht.Semiconductor component with a lead frame (108) and a heat sink (104) glued to it, a first layer (311) made of hardened, heat-conducting epoxy resin being arranged on at least part of a first of the glued surfaces of the lead frame (108) or the heat sink (104) and wherein a further layer (312) is arranged between the second of the bonded surfaces and the first layer (311), characterized in that the further layer (312) consists of thermally conductive and electrically insulating thermoplastic material.
Description
Die Erfindung betrifft ein Halbleiterbauelement und ein Verfahren zum Zusammenbau hiervon nach dem Oberbegriff des Anspruchs 1 bzw. 2.The invention relates to a semiconductor component and a method of assembling them according to the preamble of Claim 1 or 2.
Bisher ist es üblich, bei einer Halbleiterkomponente den Halbleiterchip mit einem Kühlbarren zu verkleben, den Kühlbarren mit dem Leiterrahmen mittels eines beidseitig adhäsiv gemachten Polyimidbandes zu verkleben und dann den Chip über Drähte mit dem Leiterrahmen elektrisch zu verbinden. Die ganze Komponente wird dann in eine Vergußmasse eingebettet. Der Kühlbarren kann nach außen freiliegend ausgebildet sein, so dass er dann mit einer Wärmesenke verbunden werden kann, oder er kann ebenfalls vollständig von der Ver gußmasse umhüllt sein. Der Kühlbarren dient dazu, innerhalb des Chips während dessen Betrieb entwickelte Wärme nach außen abzuführen. Der Kühlbarren besteht typischerweise aus einem Metall, wie Kupfer oder Aluminium, mit hoher thermischer Leitfähigkeit. Er leitet die Wärme an die Umgebung ab oder auch an die nach außen führenden Teile des Leiterrahmens.So far, it has been common for a semiconductor component the semiconductor chip with a cooling bar to glue the cooling bar with the lead frame by means of an adhesive made on both sides Polyimide tape and then glue the chip over wires to the lead frame electrically connect to. The entire component is then embedded in a casting compound. The cooling bar can go outside be exposed so that it can then be used with a heat sink can be connected, or it can also be completely by the casting compound to be enveloped. The cooling bar serves to develop within the chip during its operation Dissipate heat to the outside. The cooling bars typically consists of a metal, such as copper or aluminum, with high thermal conductivity. It conducts heat to the environment or to the parts of the lead frame leading to the outside.
Das Polyimidband, das für die Verbindung des Kühlkörpers mit dem Leiterrahmen verwendet wird, ist typischerweise rings um den Umfang der oberen Oberfläche des Kühlkörpers angeordnet. Die Leiter des Leiterrahmens werden auf der anderen Seite des Polyimidbandes positioniert, und nachdem der Kühlkörper mit dem Leiterrahmen verbunden worden ist, wird der Chip auf dem zentralen Bereich der oberen Oberfläche des Kühlkörpers unter Verwendung eines Chipbefestigungsklebers angebracht. Das Polyimidband hält den Kühlkörper und den Leiterrahmen in festgelegter Relativposition, wenn die Vergußmasse um die verschiedenen Elemente der Halbleiterkomponente aufgebracht wird.The polyimide tape used to connect the Heatsink with the lead frame is typically used around the Circumference of the upper surface arranged the heat sink. The leads of the lead frame are on the other side of the polyimide tape positioned, and after using the heat sink the lead frame has been connected, the chip will be on the central Area of the upper surface of the heat sink under Using a chip attachment adhesive attached. The polyimide tape holds that Heatsink and the Lead frame in a fixed relative position when the potting compound around the various elements of the semiconductor component applied becomes.
Das Polyimidband ist wärmeleitend, jedoch elektrisch isolierend. Im Ergebnis wird Wärme, die von dem Kühlkörper aufgenommen worden ist, durch das Polyimidband auf den Leiterrahmen übertragen. Da das Polyimidband jedoch elektrisch isolierend ist, schließt es nicht die verschiedenen Leiter des Leiterrahmens kurz.The polyimide tape is thermally conductive, however electrically insulating. As a result, heat is absorbed by the heat sink has been transferred to the lead frame through the polyimide tape. There however, the polyimide tape is electrically insulating, it does not close the different conductors of the lead frame briefly.
Um den Kühlkörper mit dem Leiterrahmen zu verbinden, wird die auf einer Seite des Polyimidbandes angebrachte adhäsive Schicht auf dem Kühlkörper plaziert, womit das Polyimidband auf dem Kühlkörper befestigt wird. Danach wird der Leiterrahmen auf der anderen adhäsiven Schicht des Polyimidbandes positioniert, womit das Polyimidband an dem Leiterrahmen festgelegt wird. Leiterrahmen und Kühlkörper werden dann zusammengespannt, und das Polyimidband wird erhitzt, wodurch die adhäsiven Schichten ausgehärtet werden und den Leiterrahmen mit dem Kühlkörper verbinden. Der Leiterrahmen muß auf der adhäsiven Schicht, kurz nachdem das Polyimidband auf dem Kühlkörper befestigt worden ist, aufgebracht werden, um zu verhindern, daß die freiliegende adhäsive Schicht durch Aussetzung der Umgebungsluft kontaminiert wird.To connect the heat sink to the lead frame, becomes the adhesive layer attached to one side of the polyimide tape placed on the heat sink, which attaches the polyimide tape to the heat sink becomes. After that, the lead frame is on the other adhesive layer positioned of the polyimide tape, whereby the polyimide tape on the lead frame is set. The lead frame and heat sink are then clamped together, and the polyimide tape is heated, causing the adhesive layers hardened and connect the lead frame to the heat sink. The lead frame must be on the adhesive Layer shortly after the polyimide tape is attached to the heat sink, applied to prevent the exposed adhesive layer is contaminated by exposure to ambient air.
Das Polyimidband ist relativ teuer, weil die adhäsiven Schich ten auf jede Seite der Polyimidschicht auflaminiert werden müssen. Wenn darüber hinaus das Polyimidband unrichtig zwischen dem Kühlkörper und dem Leiterrahmen eingespannt wird, können Spalten zwischen der adhäsiven Schicht und dem Kühlkörper und/oder zwischen der anderen adhäsiven Schicht und dem Leiterrahmen entstehen. Im Ergebnis kann eine schlechte Haftung zwischen Kühlköper und Leiterrahmen gebildet werden. Dieses Problem wird noch verschärft, indem das Polyimidband eine Tendenz zu Verwerfungen hat, was zu einer nicht optimalen Verbindung zwischen Leiterrahmen und Kühlkörper führen kann. Zusätzlich muß das Polyimidband eine Minimaldicke haben, typischerweise mehr als 0,025 mm, damit eine Folie gebildet werden kann. Mit zunehmender Dicke der Polyimidschicht wird die Fähigkeit des Polyimidbandes verringert, Wärme abzuleiten.The polyimide tape is relatively expensive because the adhesive Layers are laminated onto each side of the polyimide layer have to. If beyond that the polyimide tape is incorrectly clamped between the heat sink and the lead frame will, can Columns between the adhesive Layer and the heat sink and / or between the other adhesive Layer and the lead frame arise. The result can be a bad one Liability between heat sink and Lead frames are formed. This problem is exacerbated by the polyimide tape has a tendency to warp, resulting in a not lead optimal connection between lead frame and heat sink. additionally must Polyimide tape have a minimum thickness, typically more than 0.025 mm so that a film can be formed. With increasing thickness the polyimide layer becomes the ability of the polyimide tape reduced, heat derive.
Bei der
Aufgabe der Erfindung ist es, ein Halbleiterbauelement und ein Verfahren zu seinem Zusammenbau nach dem Oberbegriff des Anspruchs 1 bzw. 2 zu schaffen, die einen flexiblen Zusammenbau ermöglichen.The object of the invention is a Semiconductor component and a method for its assembly after the preamble of claim 1 or 2 to create a flexible Allow assembly.
Diese Aufgabe wird mit den Merkmalen des Anspruchs 1 bzw. 2 gelöst.This task comes with the characteristics of claim 1 and 2 solved.
Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsformen. Dabei wird auf die beigefügten Zeichnungen bezuggenommen.There are advantages of the invention from the following description of preferred embodiments. In doing so, the attached Drawings referenced.
Nachdem die Epoxydharzschicht
Nachdem die Epoxydharzschicht
Um den Kühlkörper
Wenn die thermoplastische adhäsive Schicht
Der Schmelzpunkt der thermoplastischen adhäsiven Schicht
Der Halbleiterchip
Die
Die Verbindungsschicht
Alternativ kann die Verbindungsschicht
Zusätzlich zu der Tatsache, daß die Verbindungsschicht
Darüberhinaus haften die Epoxydharzpaste und
die thermoplastische adhäsive
Paste sehr gut an dem Kühlkörper
In einer anderen Ausführungsform
der Erfindung wird die adhäsive
Schicht
Um den Leiterrahmen
In einer Abwandlung dieser Ausführungsform
können
die vollständig
ausgehärtete
Epoxydharzschicht
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE19655310A DE19655310B4 (en) | 1995-09-19 | 1996-09-13 | Adhesively bonding lead frame of semiconductor component to heat sink - using cured epoxy resin layer and thermoplastic material or partly cured epoxy! resin |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US530772 | 1995-09-19 | ||
US08/530,772 US5691567A (en) | 1995-09-19 | 1995-09-19 | Structure for attaching a lead frame to a heat spreader/heat slug structure |
DE19655310A DE19655310B4 (en) | 1995-09-19 | 1996-09-13 | Adhesively bonding lead frame of semiconductor component to heat sink - using cured epoxy resin layer and thermoplastic material or partly cured epoxy! resin |
Publications (2)
Publication Number | Publication Date |
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DE19637285A1 DE19637285A1 (en) | 1997-04-10 |
DE19637285B4 true DE19637285B4 (en) | 2004-08-26 |
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Application Number | Title | Priority Date | Filing Date |
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DE19637285A Expired - Fee Related DE19637285B4 (en) | 1995-09-19 | 1996-09-13 | Semiconductor device and method of assembling the same |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE19722355A1 (en) * | 1997-05-28 | 1998-12-03 | Bosch Gmbh Robert | Method of manufacturing electrical assemblies and electrical assembly |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US4783428A (en) * | 1987-11-23 | 1988-11-08 | Motorola Inc. | Method of producing a thermogenetic semiconductor device |
DE8914493U1 (en) * | 1989-12-08 | 1990-05-17 | Siemens Ag, 1000 Berlin Und 8000 Muenchen, De | |
US5068708A (en) * | 1989-10-02 | 1991-11-26 | Advanced Micro Devices, Inc. | Ground plane for plastic encapsulated integrated circuit die packages |
US5208188A (en) * | 1989-10-02 | 1993-05-04 | Advanced Micro Devices, Inc. | Process for making a multilayer lead frame assembly for an integrated circuit structure and multilayer integrated circuit die package formed by such process |
DE4325712A1 (en) * | 1993-07-30 | 1995-02-02 | Siemens Ag | Method for encapsulating electrical or electronic components or modules, and encapsulation of electrical or electronic components or modules |
DE19529627C1 (en) * | 1995-08-11 | 1997-01-16 | Siemens Ag | Thermally conductive, electrically insulating connection and method for its production |
-
1996
- 1996-09-13 DE DE19637285A patent/DE19637285B4/en not_active Expired - Fee Related
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US4783428A (en) * | 1987-11-23 | 1988-11-08 | Motorola Inc. | Method of producing a thermogenetic semiconductor device |
US5068708A (en) * | 1989-10-02 | 1991-11-26 | Advanced Micro Devices, Inc. | Ground plane for plastic encapsulated integrated circuit die packages |
US5208188A (en) * | 1989-10-02 | 1993-05-04 | Advanced Micro Devices, Inc. | Process for making a multilayer lead frame assembly for an integrated circuit structure and multilayer integrated circuit die package formed by such process |
DE8914493U1 (en) * | 1989-12-08 | 1990-05-17 | Siemens Ag, 1000 Berlin Und 8000 Muenchen, De | |
DE4325712A1 (en) * | 1993-07-30 | 1995-02-02 | Siemens Ag | Method for encapsulating electrical or electronic components or modules, and encapsulation of electrical or electronic components or modules |
DE19529627C1 (en) * | 1995-08-11 | 1997-01-16 | Siemens Ag | Thermally conductive, electrically insulating connection and method for its production |
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DE-Z.: "Verklebt Polyimid ", PRONIC, H. 1/2, 1991, S. 22-23 * |
DE-Z.: MICHEL, M.: VDI-Berichte Nr. 258, 1976, S. 13-22 * |
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DE19637285A1 (en) | 1997-04-10 |
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