DE102011004508A1 - Method for contacting LED chip for LED lamp, involves mechanically pressing electrically conductive contact surface of chip carrier to appropriate electrically conductive contact surface of LED chip - Google Patents
Method for contacting LED chip for LED lamp, involves mechanically pressing electrically conductive contact surface of chip carrier to appropriate electrically conductive contact surface of LED chip Download PDFInfo
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- DE102011004508A1 DE102011004508A1 DE102011004508A DE102011004508A DE102011004508A1 DE 102011004508 A1 DE102011004508 A1 DE 102011004508A1 DE 102011004508 A DE102011004508 A DE 102011004508A DE 102011004508 A DE102011004508 A DE 102011004508A DE 102011004508 A1 DE102011004508 A1 DE 102011004508A1
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- contact surface
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Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Kontaktierung mindestens eines LED-Chips, insbesondere ein Verfahren und eine Vorrichtung zur Kontaktierung eines LED-Chips ohne einen Bond-Prozess.The invention relates to a method and a device for contacting at least one LED chip, in particular a method and a device for contacting an LED chip without a bonding process.
Bei Beleuchtungs- und Inspektionssystemen wird Licht mit hoher Lichtintensität benötigt. Aufgrund eines immer höher werdenden Wirkungsgrades und zunehmender Lebensdauer setzen sich verstärkt Beleuchtungs- und Inspektionssysteme durch, die über leuchtemittierende Dioden-LEDs verfügen.Lighting and inspection systems require high intensity light. Due to ever-increasing efficiency and increasing service life, lighting and inspection systems that feature light-emitting diode LEDs are becoming increasingly popular.
Bei herkömmlichen LED-Beleuchtungssystemen werden Hochleistungs-LEDs in Gehäusen eingesetzt. Eine leuchtemittierende Diode bzw. ein LED-Chip verfügt herkömmlicherweise über zwei Kontaktflächen, über die eine elektrische Spannung angelegt wird, woraufhin die leuchtemittierende Diode optisches Licht emittiert. In herkömmlichen Verfahren zum Kontaktieren eines LED-Chips wird eine der beiden Kontaktflächen des LED-Chips, beispielsweise die Anode, direkt mit einem Chip-Träger verbunden, während die andere Kontaktfläche des LED-Chips über Bonddrähte mit einem zweiten Kontaktanschluss des Chip-Trägers bzw. der Leiterplatte verbunden wird.
Die herkömmliche Vorgehensweise zum Kontaktieren des LED-Chips weist allerdings einige erhebliche Nachteile auf. Das Bonden der LED-Chips durch den Bondautomaten ist relativ aufwändig und nimmt einen erheblichen Zeitraum in Anspruch.However, the conventional approach to contacting the LED chip has some significant disadvantages. The bonding of the LED chips through the bonding machine is relatively complex and takes a considerable amount of time.
Ein weiterer Nachteil besteht darin, dass das Bondmaterial, aus dem die Bonddrähte bestehen, herkömmlicherweise Gold oder ein vergleichbares Material ist. Die Länge derartiger herkömmlicher Bonddrähte B1, B2, wie in
Ein weiterer Nachteil der herkömmlichen Vorgehensweise zum Kontaktieren eines LED-Chips besteht darin, dass die Wärmeableitung von dem LED-Chip über die Bonddrähte zu dem Chip-Träger bzw. der Leiterplatte aufgrund des relativ geringen Durchmessers der Bonddrähte begrenzt ist. Daher ergibt sich bei der herkömmlichen Vorgehensweise die zusätzliche Notwendigkeit, dass die LED-Chips aufwändig gekühlt werden, da eine ausreichende Kühlung entscheidend für eine gute Lichtausbeute und eine lange Lebensdauer eines LED-Chips ist.Another disadvantage of the conventional approach for contacting an LED chip is that the heat dissipation from the LED chip over the bonding wires to the chip carrier or the printed circuit board is limited due to the relatively small diameter of the bonding wires. Therefore, in the conventional approach, there is an additional requirement that the LED chips be cooled consuming, since sufficient cooling is crucial for a good light output and a long life of an LED chip.
Es ist daher eine Aufgabe der vorliegenden Erfindung, ein Verfahren und eine Vorrichtung zum Kontaktieren eines LED-Chips zu schaffen, welche die obengenannten Nachteile vermeidet und eine effiziente Kontaktierung des LED-Chips bietet.It is therefore an object of the present invention to provide a method and a device for contacting an LED chip, which avoids the above-mentioned disadvantages and provides efficient contacting of the LED chip.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren mit den im Patentanspruch 1 angegebenen Merkmalen gelöst.This object is achieved by a method having the features specified in
Die Erfindung schafft ein Verfahren zum Kontaktieren eines LED-Chips, wobei mindestens eine elektrisch leitfähige Kontaktfläche eines Chip-Trägers an eine entsprechend leitfähige Kontaktfläche des LED-Chips zur Herstellung eines elektrischen Kontaktes zwischen dem Chip-Träger und dem LED-Chip mechanisch angepresst wird.The invention provides a method for contacting an LED chip, wherein at least one electrically conductive contact surface of a chip carrier is mechanically pressed against a correspondingly conductive contact surface of the LED chip for establishing an electrical contact between the chip carrier and the LED chip.
Das erfindungsgemäße Verfahren bietet den Vorteil, dass die Kontaktierung des LED-Chips besonders schnell bzw. in kurzer Zeit erfolgen kann.The inventive method has the advantage that the contacting of the LED chip can be done very quickly or in a short time.
Das erfindungsgemäße Verfahren bietet zudem den Vorteil, dass die elektrisch leitfähige Kontaktfläche des Chip-Trägers aus keinem hochwertigen Material, beispielsweise Gold, bestehen muss, so dass der Materialverbrauch derartiger hochwertiger Materialien bei dem erfindungsgemäßen Verfahren minimiert bzw. vollständig eliminiert werden kann.The inventive method also has the advantage that the electrically conductive contact surface of the chip carrier from no high quality material, such as gold, must exist, so that the material consumption of such high quality materials can be minimized or completely eliminated in the inventive method.
Ein weiterer Vorteil des erfindungsgemäßen Verfahrens besteht darin, dass die elektrisch leitfähige Kontaktfläche des Chip-Trägers nahezu die gleiche Fläche wie eine entsprechend leitfähige Kontaktfläche des LED-Chips aufweisen kann und somit im Vergleich zu herkömmlichen Kontaktierungsverfahren eine weit größere Kontaktfläche zwischen dem Chip-Träger und dem LED-Chip hergestellt werden kann. Diese größere Kontaktfläche bietet wiederum den Vorteil, dass der elektrische und thermische Widerstand zwischen dem Chip-Träger und dem kontaktierten LED-Chip minimal ist, so dass Verluste minimiert werden und somit die elektrische Effizienz gesteigert werden kann. Weiterhin bietet die im Vergleich zu herkömmlichen Kontaktierungsverfahren vergrößerte Kontaktfläche die Möglichkeit einer vereinfachten Kühlung des LED-Chips, so dass die Lichtausbeute und die Lebensdauer des kontaktierten LED-Chips gesteigert werden kann. Another advantage of the method according to the invention is that the electrically conductive contact surface of the chip carrier can have almost the same area as a corresponding conductive contact surface of the LED chip and thus compared to conventional contacting a much larger contact area between the chip carrier and the LED chip can be made. This larger contact area, in turn, has the advantage that the electrical and thermal resistance between the chip carrier and the contacted LED chip is minimal, so that losses can be minimized and thus the electrical efficiency can be increased. Furthermore, the increased compared to conventional contacting method contact surface the possibility of simplified cooling of the LED chip, so that the luminous efficacy and the life of the contacted LED chip can be increased.
Ein weiterer Vorteil des erfindungsgemäßen Verfahrens besteht darin, dass bei dem erfindungsgemäßen Kontaktierungsverfahren ein kontaktierter LED-Chip in einfacher Weise wieder von dem Chip-Träger entfernt werden kann. Bei einer Variante des erfindungsgemäßen Verfahrens wird nur eine der beiden Kontaktflächen des LED-Chips durch Anpressen einer entsprechenden elektrisch leitfähigen Kontaktfläche des Chip-Trägers kontaktiert. Bei einer alternativen Variante des erfindungsgemäßen Verfahrens werden beide Kontaktflächen des LED-Chips durch Anpressen entsprechender elektrisch leitfähiger Kontaktflächen des Chip-Trägers kontaktiert. Insbesondere bei der zweiten Variante kann ein bereits kontaktierter LED-Chip in einfacher Weise durch einen anderen LED-Chip ersetzt werden.A further advantage of the method according to the invention is that in the contacting method according to the invention, a contacted LED chip can be easily removed again from the chip carrier. In a variant of the method according to the invention, only one of the two contact surfaces of the LED chip is contacted by pressing a corresponding electrically conductive contact surface of the chip carrier. In an alternative variant of the method according to the invention, both contact surfaces of the LED chip are contacted by pressing corresponding electrically conductive contact surfaces of the chip carrier. In particular, in the second variant, an already contacted LED chip can be easily replaced by another LED chip.
Das erfindungsgemäße Verfahren benötigt keinen Bondprozess, so dass auch kein Bondautomat zur Kontaktierung der LED-Chips zur Verfügung stehen muss.The method according to the invention requires no bonding process, so that no bonding machine for contacting the LED chips must be available.
Bei einer Ausführungsform des erfindungsgemäßen Verfahrens wird die elektrisch leitfähige Kontaktfläche des Chip-Trägers an eine flexible Leiterplatte oder an ein flexibles Leiterband angebracht, wobei die Kontaktfläche des Chip-Trägers mechanisch an eine erste elektrisch leitfähige Kontaktfläche des LED-Chips zur Herstellung des elektrischen Kontaktes angepresst wird.In one embodiment of the method according to the invention, the electrically conductive contact surface of the chip carrier is attached to a flexible printed circuit board or to a flexible conductor strip, wherein the contact surface of the chip carrier is mechanically pressed against a first electrically conductive contact surface of the LED chip for producing the electrical contact becomes.
In einer weiteren möglichen Ausführungsform des erfindungsgemäßen Verfahrens wird eine zweite elektrisch leitfähige Kontaktfläche des LED-Chips auf eine entsprechende elektrische Kontaktfläche des Chip-Träger angepresst oder fest mit ihr verlötet.In a further possible embodiment of the method according to the invention, a second electrically conductive contact surface of the LED chip is pressed onto a corresponding electrical contact surface of the chip carrier or soldered firmly to it.
In einer weiteren möglichen Ausführungsform des erfindungsgemäßen Verfahrens wird die elektrisch leitfähige Kontaktfläche des Chip-Trägers an die entsprechende elektrisch leitfähige Kontaktfläche des LED-Chips mittels eines elastischen Materials oder mittels mindestens eines Federstiftes mechanisch angepresst.In a further possible embodiment of the method according to the invention, the electrically conductive contact surface of the chip carrier is mechanically pressed against the corresponding electrically conductive contact surface of the LED chip by means of an elastic material or by means of at least one spring pin.
In einer weiteren möglichen Ausführungsform des erfindungsgemäßen Verfahrens weist der Chip-Träger mindestens eine der räumlichen Größe des LED-Chips entsprechende Ausnehmung auf, in welche der LED-Chip eingelegt wird, wobei eine elektrisch leitfähige Kontaktfläche einer über die Ausnehmung anschließend angebrachten flexiblen Leiterplatte oder eines Federstiftes an eine entsprechende Kontaktfläche des in die Ausnehmung des Chip-Trägers eingelegten LED-Chips mechanisch angepresst wird.In a further possible embodiment of the method according to the invention, the chip carrier has at least one recess corresponding to the spatial size of the LED chip into which the LED chip is inserted, wherein an electrically conductive contact surface of a flexible printed circuit board subsequently attached via the recess Spring pin is mechanically pressed against a corresponding contact surface of the inserted into the recess of the chip carrier LED chips.
Bei einer möglichen Ausführung des erfindungsgemäßen Verfahrens bestehen die Federstifte des Chip-Trägers aus einem lichtreflektierenden Material und werden derart ausgeformt, dass sie Licht, welches von dem LED-Chip abgegeben wird, zumindest teilweise umlenken.In a possible embodiment of the method according to the invention, the spring pins of the chip carrier consist of a light-reflecting material and are shaped such that they deflect light which is emitted by the LED chip at least partially.
Bei einer weiteren möglichen Ausführung des erfindungsgemäßen Verfahrens wird der LED-Chip mittels Positionierungsbauelementen, insbesondere mittels Positionierungsstiften, auf den Chip-Träger zu dessen Kontaktierung zur Herstellung des elektrischen Kontaktes positioniert.In a further possible embodiment of the method according to the invention, the LED chip is positioned by means of positioning components, in particular by means of positioning pins, on the chip carrier for its contacting for the production of the electrical contact.
Die Erfindung schafft ferner einen Chip-Träger zur Kontaktierung mindestens eines LED-Chips mit den in Patentanspruch 9 angegebenen Merkmalen.The invention further provides a chip carrier for contacting at least one LED chip having the features specified in
Die Erfindung schafft einen Chip-Träger zur Kontaktierung mindestens eines LED-Chips, wobei mindestens eine elektrisch leitfähige Kontaktfläche des Chip-Trägers an eine entsprechende elektrisch leitfähige Kontaktfläche des LED-Chips zur Herstellung eines elektrischen Kontaktes zwischen dem Chip-Träger und dem LED-Chip mechanisch anpressbar ist.The invention provides a chip carrier for contacting at least one LED chip, wherein at least one electrically conductive contact surface of the chip carrier to a corresponding electrically conductive contact surface of the LED chip for establishing an electrical contact between the chip carrier and the LED chip is mechanically pressed.
Bei einer möglichen Ausführungsform des erfindungsgemäßen Chip-Trägers wird die elektrisch leitfähige Kontaktfläche des Chip-Trägers an einer flexiblen Leiterplatte oder an einem flexiblen Leiterband des Chip-Trägers angebracht.In one possible embodiment of the chip carrier according to the invention, the electrically conductive contact surface of the chip carrier is attached to a flexible printed circuit board or to a flexible conductor strip of the chip carrier.
Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen Chip-Trägers weist der Chip-Träger ein elastisches Material oder mindestens einen Federstift auf, durch welchen die elektrisch leitfähige Kontaktfläche des Chip-Trägers an die entsprechende elektrisch leitfähige Kontaktfläche des LED-Chips mechanisch angepresst wird. In a further possible embodiment of the chip carrier according to the invention, the chip carrier has an elastic material or at least one spring pin, by means of which the electrically conductive contact surface of the chip carrier is mechanically pressed against the corresponding electrically conductive contact surface of the LED chip.
Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen Chip-Trägers weist der Chip-Träger mindestens eine der Größe des LED-Chips entsprechende Ausnehmung auf, in welche der LED-Chip einlegbar ist, wobei eine elektrisch leitfähige Kontaktfläche einer über die Ausnehmung anschließend angebrachten flexiblen Leiterplatte oder eines Federstiftes an eine entsprechende Kontaktfläche des in die Ausnehmung des Chip-Trägers eingelegten LED-Chips mechanisch angepresst wird.In a further possible embodiment of the chip carrier according to the invention, the chip carrier has at least one recess corresponding to the size of the LED chip into which the LED chip can be inserted, wherein an electrically conductive contact surface of a flexible printed circuit board subsequently attached via the recess a spring pin is mechanically pressed against a corresponding contact surface of the inserted into the recess of the chip carrier LED chips.
Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen Chip-Trägers ist über dem in die Ausnehmung des Chip-Trägers eingelegten LED-Chip ein kompressibles Konvertermaterial vorgesehen, durch das die elektrisch leitfähige Kontaktfläche der über die Ausnehmung angebrachten flexiblen Leiterplatte an die entsprechende Kontaktfläche des in die Ausnehmung des Chip-Trägers eingelegten LED-Chips mechanisch angepresst wird.In a further possible embodiment of the chip carrier according to the invention, a compressible converter material is provided above the LED chip inserted into the recess of the chip carrier, through which the electrically conductive contact surface of the flexible printed circuit board mounted over the recess to the corresponding contact surface of the recess in the recess the chip carrier inserted LED chips is mechanically pressed.
Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen Chip-Trägers bestehen die Federstifte des Chip-Trägers aus einem lichtreflektierenden Material und sind derart ausgeformt, dass sie Licht, welches von dem LED-Chip abgegeben wird, zumindest teilweise umlenken.In a further possible embodiment of the chip carrier according to the invention, the spring pins of the chip carrier are made of a light-reflecting material and are formed such that they at least partially deflect light which is emitted by the LED chip.
Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen Chip-Trägers ist ein Peltierelement vorgesehen, durch welches eine zweite elektrische leitfähige Kontaktfläche des LED-Chips kühlbar ist.In a further possible embodiment of the chip carrier according to the invention, a Peltier element is provided, through which a second electrically conductive contact surface of the LED chip can be cooled.
Im Weiteren werden mögliche Ausführungsformen des erfindungsgemäßen Verfahrens und des erfindungsgemäßen Chip-Trägers zur Kontaktierung mindestens eines LED-Chips unter Bezugnahme auf die beigefügten Figuren näher erläutert.In the following, possible embodiments of the method according to the invention and the chip carrier according to the invention for contacting at least one LED chip will be explained in more detail with reference to the attached figures.
Es zeigen:Show it:
Wie man aus
Die elektrisch leitfähige Kontaktfläche
Die mechanische Anpressung der flexiblen Leiterplatte bzw. das flexible Leiterband
Die Größe der flexiblen Leiterplatte
Bei der in
Bei dem Chip-Träger
Bei einer möglichen Ausführungsvariante des erfindungsgemäßen Verfahrens kann die Kraft F, welche auf die flexible Leiterplatte
Bei dem erfindungsgemäßen Verfahren zum Kontaktieren des LED-Chips
Das Schieben der beiden flexiblen Leiterplatten
Durch das Schieben der beiden flexiblen elastischen Leiterplatten
Bei dem in
Bei dem in
Bei dem erfindungsgemäßen Verfahren zum Kontaktieren eines LED-Chips
Der erfindungsgemäße Chip-Träger
Claims (16)
Priority Applications (1)
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DE102011004508A DE102011004508A1 (en) | 2011-02-22 | 2011-02-22 | Method for contacting LED chip for LED lamp, involves mechanically pressing electrically conductive contact surface of chip carrier to appropriate electrically conductive contact surface of LED chip |
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DE102011004508A DE102011004508A1 (en) | 2011-02-22 | 2011-02-22 | Method for contacting LED chip for LED lamp, involves mechanically pressing electrically conductive contact surface of chip carrier to appropriate electrically conductive contact surface of LED chip |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US6582100B1 (en) * | 2000-08-09 | 2003-06-24 | Relume Corporation | LED mounting system |
US20040041159A1 (en) * | 2002-09-02 | 2004-03-04 | Matsushita Electric Industrial Co., Ltd. | Light-emitting device |
US20040227146A1 (en) * | 2003-05-14 | 2004-11-18 | Jiahn-Chang Wu | Solderless connection in LED module |
US20070205426A1 (en) * | 2006-01-31 | 2007-09-06 | Sanyo Electronic Co., Ltd. | Semiconductor light-emitting device |
DE102008011862A1 (en) * | 2008-02-29 | 2009-09-03 | Osram Opto Semiconductors Gmbh | Miniature housing, carrier assembly with at least one miniature housing, and a method for producing a carrier assembly |
DE102008045653A1 (en) * | 2008-09-03 | 2010-03-04 | Osram Opto Semiconductors Gmbh | Optoelectronic component |
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2011
- 2011-02-22 DE DE102011004508A patent/DE102011004508A1/en not_active Withdrawn
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US6582100B1 (en) * | 2000-08-09 | 2003-06-24 | Relume Corporation | LED mounting system |
US20040041159A1 (en) * | 2002-09-02 | 2004-03-04 | Matsushita Electric Industrial Co., Ltd. | Light-emitting device |
US20040227146A1 (en) * | 2003-05-14 | 2004-11-18 | Jiahn-Chang Wu | Solderless connection in LED module |
US20070205426A1 (en) * | 2006-01-31 | 2007-09-06 | Sanyo Electronic Co., Ltd. | Semiconductor light-emitting device |
DE102008011862A1 (en) * | 2008-02-29 | 2009-09-03 | Osram Opto Semiconductors Gmbh | Miniature housing, carrier assembly with at least one miniature housing, and a method for producing a carrier assembly |
DE102008045653A1 (en) * | 2008-09-03 | 2010-03-04 | Osram Opto Semiconductors Gmbh | Optoelectronic component |
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