EP2059949A1 - Leuchtmodul - Google Patents
LeuchtmodulInfo
- Publication number
- EP2059949A1 EP2059949A1 EP07788036A EP07788036A EP2059949A1 EP 2059949 A1 EP2059949 A1 EP 2059949A1 EP 07788036 A EP07788036 A EP 07788036A EP 07788036 A EP07788036 A EP 07788036A EP 2059949 A1 EP2059949 A1 EP 2059949A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- emitting diode
- silicon substrate
- module according
- light module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/858—Means for heat extraction or cooling
- H10H20/8581—Means for heat extraction or cooling characterised by their material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
- B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/151—Light emitting diodes [LED] arranged in one or more lines
- F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/30—Die-attach connectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
- H10H20/856—Reflecting means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
Definitions
- the invention relates to a light-emitting module having at least one light-emitting diode (LED) arranged on a substrate, wherein the substrate is a silicon substrate and the light-emitting diode is designed as a light-emitting diode chip.
- LED light-emitting diode
- the silicon oxide layer between the silicon substrate and the light-emitting diode chip.
- the silicon oxide layer is formed as a silicon dioxide layer (SiO 2).
- SiO 2 acts as an electrically insulating layer between the silicon substrate and the light-emitting diode chip.
- the silicon oxide layer offers two further advantages, which favors the heat dissipation from the LED chip.
- the silicon oxide layer which is produced, for example, by passivation of the silicon substrate surface, has a very low height (1 to 2 ⁇ m) compared to physically applied insulating layers, and, on the other hand, still has a moderate thermal conductivity Heat is dissipated by the light-emitting diode chip advantageous.
- a metallization is applied as an electrical and / or thermal contact for the LED chip on the silicon oxide layer.
- the metallization dissipates the heat generated in the LED chip quickly and easily.
- bond connections can be established, for example by means of wire bonding.
- the LED chip is contacted via the metallization directly electrically, so that a subsequent creation of, for example, bonds is not necessary.
- the light-emitting diode chip is applied to the metallization by means of the so-called flip-chip technique. This means that the LED chip with its active contacting side is mounted towards the silicon substrate. This brings advantages especially for a package and short conductor lengths.
- the electrical connections to the light-emitting diode chip are created simultaneously, and not sequentially as in wire bonding, so that a time saving is achieved.
- the light-emitting diode chip is soldered to the metallization.
- a silicon oxide layer is provided on the back side of the substrate.
- the silicon substrate can be attached with its back directly to an electrically conductive support, such as on a printed circuit board, without additional insulation or a complex arrangement of the tracks on the circuit board, is necessary.
- an electrically conductive support such as on a printed circuit board
- heat of the silicon substrate can be dissipated very well to the carrier.
- a plurality of light-emitting diode chips are arranged at a distance from one another on the front side of the silicon substrate.
- the electrical insulation of the silicon oxide layer serves to electrically separate different areas of the lighting module, such as light-emitting diode chips connected in series, from each other.
- the silicon oxide layer is an especially easy to implement insulation.
- the use of light emitting diode Chips has the advantage over light-emitting diode solutions that use packaged LED's, especially for headlights of a motor vehicle, which are relatively large light sources due to the required number of individual LEDs, to enable particularly small light sources and thereby achieve a more flexible use.
- the corresponding optics which are to project the generated light onto the street are smaller.
- the light module according to the invention makes it possible in a simple manner to realize the luminous power per luminous module individually according to customer requirements, the basic structure of the luminous module remains unchanged and only the luminous module size is changed. This happens for example by singling by sawing, milling and / or lasers.
- the light-emitting diode chips can be arranged in any manner on the silicon substrate, wherein they are advantageously arranged so that a favorable heat distribution is formed and / or so that the legally prescribed cut-off with the 15 ° increase for motor vehicle headlights is formed, which is mapped in a suitable manner by an additional optics on the road.
- a light-emitting diode chip is arranged in a cavity. After the application of a light-emitting diode chip in a cavity, it is advantageously filled with a phosphorus conversion gel or an optically inert material in order to produce white light from the blue or UV-emitting light of the light-emitting diode chips. If the light-emitting diode chip is already phosphor-coated, encapsulation of the cavity with optically neutral material is advantageous.
- the cavity is formed as ⁇ tzkavmaschine, for example by wet-chemical etching with KOH.
- the flanks of the cavity have a metallization in order to achieve better optical properties for light extraction.
- the metallized flanks form mirror surfaces.
- a metallization is applied as a contact surface to a carrier, such as a printed circuit board, or to a heat sink on the back of the silicon substrate.
- the metallization of the back is beneficial when a suitably sized heat sink is soldered to the back, which gives the generated heat efficiently to the environment.
- an adhesive layer is applied thereto on the back side of the silicon substrate.
- At least one sensor is applied to the silicon substrate, which detects the light output and / or the temperature of one or more light-emitting diode chips, since these are dependent on their performance.
- the light output of headlamps is regulated by legal requirements.
- the driver of a motor vehicle advantageously by means of a warning message is a defective
- Light-emitting chip or a defective light module reported. Electrical parameters would not reflect the light output or only inadequate.
- the sensor it is also possible to detect the aging effect of a light-emitting diode chip, so that this by a suitable control of the
- Light-emitting diode chips is balanced. According to a development of the invention is advantageously at least one other function, such as dimming or turning off the light-emitting diode chip, an evaluation of integrated sensors, a control circuit and / or communication with an electronic control system for controlling the Light-emitting diode chips, integrated on the silicon substrate, so that an intelligent light-emitting module is realized.
- the senor in the range of scattered light, in particular in the range of laterally exiting stray light of the light-emitting diode chip, arranged so that the actual light output is not adversely affected.
- a sensor is provided for each light-emitting diode chip.
- the acquired measurement data are either directly internally, ie in the light module, evaluated or guided to a control unit.
- the silicon substrate offers the possibility of accommodating one or more sensors directly on the light-emitting medium, ie directly at the light source or the light-emitting diode chip.
- a PN or PIN diode is advantageously used, which is advantageously mounted directly on the edge of an etched cavity and / or formed by doping a surface.
- such a sensor forms one of the flanks of the cavity.
- the sensor is attached or formed before the etching of the cavity. The subsequent etching of the cavity on the one hand allows the realization of the so-called bottom contact of the sensor and on the other hand performs a self-adjustment of the sensor.
- the invention relates to a method for producing a light-emitting module, in particular a light-emitting module as described above, wherein initially a silicon oxide layer is applied to a silicon substrate or generated on a silicon substrate, and wherein subsequently a
- Metallization is applied to the silicon oxide layer, and wherein finally a light-emitting diode chip is applied to the metallization.
- a cavity is etched into the silicon substrate into which the light-emitting diode chip later is used.
- the cavity is expediently filled with a phosphorus conversion gel or an optical inert mass in order to produce white light from the blue or UV-emitted light of the light-emitting diode chip.
- Figure 1 is a sectional view of an inventive
- FIG. 2 is a detailed sectional view of the light module
- Figure 3 is a perspective view of a lighting module.
- FIG. 1 shows a section of a section of a lighting module 1 which has a silicon substrate 2 and a light-emitting diode chip 3.
- the silicon substrate 2 has an etched on its front side 4
- Cavity 5 which is formed by a bottom surface 6 and side flanks 7, wherein in the illustration shown in Figure 1, only one formed by the cavity 5 flank 7 is shown.
- the flank 7 opposite flank T is formed by a sensor 8.
- the edge on its surface by a suitable doping profile so PN- or PIN-doped that the edge T acts as a sensor 8.
- the light-emitting diode chip 3 is arranged with its rear side 9 on the bottom surface 6. When switched on, the LED chip emits both direct light, indicated by the arrows 10, as well as lateral scattered light, indicated by the arrows 11.
- the sensor 8 registers the lateral scattered light 11, the measured data either intelligent internally, ie in the light module 1, evaluated or out, for example, to a control unit, out.
- This measurement data make it possible to monitor the light output of the LED chip 3. This is particularly advantageous when using the light module 1 for a headlight of a motor vehicle, in which the light output is determined by legal specifications. If the sensor 8 detects a defective light-emitting diode chip, advantageously a warning message is transmitted to the driver. In addition, can be monitored and optionally compensated by the constant monitoring of the LED chip 3 by the sensor 8, the aging effect of the LED chip, so that the life of the light module is extended.
- a silicon oxide layer 12 is advantageously provided, which causes an electrical insulation.
- the silicon oxide layer 12 is a silicon dioxide layer.
- a metallization as shown in FIG. 2, is provided.
- FIG. 2 shows the detail of the lighting module 1 from FIG. 1 from a viewing direction offset by 90 degrees, so that the sensor 8 is not shown.
- Illustrated by way of example is the silicon oxide layer 12, which is produced for example by passivation of the surface of the silicon substrate 2.
- the metallization 13 is provided, by means of which the light-emitting diode chip 3 is thermally and / or electrically contacted.
- the light-emitting diode chip 3 is set with its functional rear side 9 on the metallization 13 and soldered with it.
- Heat arising in the light-emitting diode chip 3 is advantageously dissipated via the metallization 13 and the very thin silicon oxide layer 12 to the silicon substrate 2.
- a Heatsink 15 arranged to the back 14 of the silicon substrate 2 .
- a metallization is also applied to the rear side 14 of the silicon substrate 2.
- the rear side 14 of the silicon substrate 2 is likewise insulated by means of a silicon oxide layer, wherein the metallization is applied only after the silicon oxide layer.
- the entire silicon substrate 2 is passivated, so that the silicon oxide layer is formed on the entire surface, which should be done after the etching of the cavity 5.
- the heat sink 15 can also be attached to the rear side 14 of the silicon substrate 2 by means of an adhesive layer arranged on the rear side 14 of the substrate 2.
- the intrinsic flatness of the silicon substrate has an advantageous effect, so that the necessary adhesive layer is very thin.
- FIG. 3 shows in a perspective view the
- Light module 1 In the light module 1, a plurality of cavities 5 are arranged at a distance from one another on the front side 4 of the silicon substrate 2. In each cavity 5, a light-emitting diode chip 3 is fixed in the manner described above.
- the passivation of the silicon substrate 2 by means of the silicon oxide layer 12 enables the light-emitting diode chips 3 to be connected in series.
- the flanks 7 also have a metallization in order to improve the optical properties or the luminous power of the light-emitting module 1. They serve as a mirror surface.
- This concept of the light module 1 allows a modular design in which the light output per light module 1, for example by variations of the module size, can be achieved with a single basic concept. This is of particular advantage for the design-specific considerations of today Automotive industry, in which the requirements for a light module vary widely.
- the actual module size of the lighting module 1 can, for example, after the actual production by separating, such as by sawing, be set.
- a light-emitting diode chip 3 and a sensor 8 are arranged in each cavity 5, wherein the sensor 8 is realized for example by a PN or PIN diode.
- the silicon oxide layer the heat dissipation is advantageously improved and thus enables a higher light output to be generated on a smaller area.
- the legally prescribed light-dark boundary can advantageously be imaged with a 15 degree rise already at the light module level.
- the cavities 5 can be filled with either a phosphorus conversion gel or an optically inert mass in order to produce white light from the blue or UV-emitted light of the light-emitting diode chips 3.
- suitable primary optics which project the generated light onto the road, are molded onto the lighting module. The control of the individual
- Light-emitting diode chip 3 is advantageously integrated in the silicon substrate 2. Different additional functions, such as, for example, dimming or selective switching off of individual LED chips 3, are also advantageously realized in and / or on the silicon substrate.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Mathematical Physics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Led Device Packages (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006040641A DE102006040641A1 (de) | 2006-08-30 | 2006-08-30 | Leuchtmodul |
| PCT/EP2007/057834 WO2008025625A1 (de) | 2006-08-30 | 2007-07-30 | Leuchtmodul |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2059949A1 true EP2059949A1 (de) | 2009-05-20 |
Family
ID=38477050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07788036A Withdrawn EP2059949A1 (de) | 2006-08-30 | 2007-07-30 | Leuchtmodul |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2059949A1 (de) |
| DE (1) | DE102006040641A1 (de) |
| WO (1) | WO2008025625A1 (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1988577B1 (de) * | 2007-04-30 | 2017-04-05 | Tridonic Jennersdorf GmbH | Leuchtdiode-Modul mit Siliziumplattform |
| DE102008025923B4 (de) * | 2008-05-30 | 2020-06-18 | Osram Opto Semiconductors Gmbh | Strahlungsemittierende Vorrichtung |
| DE102008043345A1 (de) | 2008-10-31 | 2010-05-06 | Robert Bosch Gmbh | Leuchtmodul |
| DE202010016958U1 (de) | 2010-12-23 | 2011-06-27 | Automotive Lighting Reutlingen GmbH, 72762 | Leuchtmodul für eine Beleuchtungseinrichtung eines Kraftfahrzeugs mit auf einem Silizium-Substrat angeordneten Halbleiterlichtquellen |
| DE102015104506A1 (de) * | 2015-03-25 | 2016-09-29 | Hella Kgaa Hueck & Co. | Beleuchtungsvorrichtung für Fahrzeuge |
| DE102015104499A1 (de) * | 2015-03-25 | 2016-09-29 | Hella Kgaa Hueck & Co. | Beleuchtungsvorrichtung für Fahrzeuge |
| EP3324437B1 (de) * | 2016-11-16 | 2019-03-13 | Melexis Technologies NV | Vorrichtung mit lichtemittierenden dioden |
| DE102016014649A1 (de) * | 2016-12-08 | 2018-06-14 | Inova Semiconductors Gmbh | Kompakte Leuchtdioden-Anordnung |
| DE102017114011B4 (de) | 2017-06-22 | 2021-09-16 | OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung | Optoelektronisches bauelement |
| DE102023110176A1 (de) * | 2023-04-21 | 2024-10-24 | Ams-Osram International Gmbh | Optoelektronisches halbleiterbauteil und herstellungsverfahren |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6137121A (en) * | 1997-10-01 | 2000-10-24 | Mitsubishi Denki Kabushiki Kaisha | Integrated semiconductor light generating and detecting device |
| US6534794B1 (en) * | 1999-08-05 | 2003-03-18 | Matsushita Electric Industrial Co., Ltd. | Semiconductor light-emitting unit, optical apparatus and optical disk system having heat sinking means and a heating element incorporated with the mounting system |
| CN1217422C (zh) * | 2000-09-29 | 2005-08-31 | 三洋电机株式会社 | 光接收元件和具有光接收元件的光子半导体器件 |
| US20030218666A1 (en) * | 2002-05-22 | 2003-11-27 | Thoughtbeam, Inc. | Projection print engine and method for forming same |
| DE10243421A1 (de) * | 2002-09-18 | 2004-04-01 | Daimlerchrysler Ag | Scheinwerfer mit pyramidenstumpfförmigen Reflektorstrukturen |
| US7165896B2 (en) * | 2004-02-12 | 2007-01-23 | Hymite A/S | Light transmitting modules with optical power monitoring |
| JP4572312B2 (ja) * | 2004-02-23 | 2010-11-04 | スタンレー電気株式会社 | Led及びその製造方法 |
| DE102004036157B4 (de) * | 2004-07-26 | 2023-03-16 | OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung | Elektromagnetische Strahlung emittierendes optoelektronisches Bauelement und Leuchtmodul |
-
2006
- 2006-08-30 DE DE102006040641A patent/DE102006040641A1/de not_active Withdrawn
-
2007
- 2007-07-30 WO PCT/EP2007/057834 patent/WO2008025625A1/de not_active Ceased
- 2007-07-30 EP EP07788036A patent/EP2059949A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008025625A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008025625A1 (de) | 2008-03-06 |
| DE102006040641A1 (de) | 2008-03-13 |
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Legal Events
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|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20090330 |
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| AX | Request for extension of the european patent |
Extension state: AL BA HR MK RS |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BRAUN, SIGMUND Inventor name: NEUBURGER, MARTIN Inventor name: HIRSCH, MICHELE Inventor name: FARBER, PAUL Inventor name: RICHTER, JOSEF |
|
| DAX | Request for extension of the european patent (deleted) | ||
| 17Q | First examination report despatched |
Effective date: 20161128 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20170411 |