EP2351462A1 - Verfahren zum herstellen eines lumineszenzkonversionselements, lumineszenzkonversionselement und optoelektronisches bauteil - Google Patents
Verfahren zum herstellen eines lumineszenzkonversionselements, lumineszenzkonversionselement und optoelektronisches bauteilInfo
- Publication number
- EP2351462A1 EP2351462A1 EP09744319A EP09744319A EP2351462A1 EP 2351462 A1 EP2351462 A1 EP 2351462A1 EP 09744319 A EP09744319 A EP 09744319A EP 09744319 A EP09744319 A EP 09744319A EP 2351462 A1 EP2351462 A1 EP 2351462A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conversion element
- luminescence conversion
- particles
- blank
- raw material
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
Definitions
- the ceramic material contains phosphor particles which are connected to one another and / or with other particles to the ceramic material.
- the compound of the phosphor particles with one another and / or with further particles of the ceramic material is at least partially of the so-called Formed sintered necks.
- grain boundaries can also be formed between adjacent particles, in particular adjacent to each other.
- the ceramic material may for example consist of the phosphor particles.
- it can contain, in addition to the phosphor particles, further particles which, in particular, have no wavelength-converting properties.
- the further particles comprise, for example, at least one of the following materials or consist of at least one of the following materials: aluminum oxide, aluminum nitride, boron nitride, titanium dioxide, zirconium dioxide, silicon dioxide.
- Mean particle diameter is understood in the present case to be the median of the particle diameter defined in this way, based on the number of particles. In other words, half of the phosphor particles / the further particles have a grain diameter which is larger than the mean grain diameter, and one half of the phosphor particles / the other particles have a grain diameter which is smaller than the mean grain diameter.
- the mean grain diameter can be determined, for example, on the basis of a microsection of a section through the luminescence conversion element. The mean grain diameter is also referred to as "d5o".
- the outer surface of the luminescence conversion element has a concavely curved partial region and / or a convexly curved partial region.
- at least a portion of the luminescence conversion element is designed as a lens, for example as a convex lens or concave lens, in particular as a plano-convex lens or plano-concave lens.
- the luminescence conversion element has the form of a dome or a cap with a lid portion and at least one side wall.
- the sidewall or a plurality of sidewalls laterally surround the lid portion or a central area of the lid portion, such that the lid portion and the sidewall / sidewalls define an interior space.
- the main extension plane of the cover section extends obliquely or perpendicular to the main extension plane (s) of the side wall or the side walls.
- the lid portion and the at least one side wall are formed integrally in one embodiment.
- the interior is open in particular on the side opposite the lid section.
- an optoelectronic component is specified.
- the component has a luminescence conversion element, which consists of a ceramic material.
- the luminescence conversion element is designed in particular according to one of the embodiments described above.
- the optoelectronic component has a radiation-emitting semiconductor chip.
- the semiconductor chip is intended to emit electromagnetic radiation of a first wavelength range.
- the luminescence conversion element is provided to convert at least a portion of the electromagnetic radiation emitted by the semiconductor chip in the first wavelength range into a second wavelength range which is at least partially different from the first wavelength range.
- the luminescence conversion element has the form of a cap with a cover section and at least one side wall
- the semiconductor chip is at least partially disposed in the cap in one embodiment of the component.
- the radiation-emitting semiconductor chip is arranged wholly or partly in the interior of the cap.
- the dimensions of the interior are chosen, for example, such that it is only suitable for receiving the semiconductor chip.
- the interior is in this case at most slightly larger than the semiconductor chip.
- the luminescence conversion element is spaced from the semiconductor chip. For example, it is attached to a housing of the component.
- a method for producing the luminescence conversion element comprises the following steps, preferably in the order given: a) providing a raw material intended for further processing into a ceramic material and containing the phosphor particle and a binder material, b) forming a blank by injecting the raw material into a closed mold, c) releasing the blank from the mold, d) removing the binder material from the blank, and e) sintering of the blank to the luminescence conversion element, wherein the phosphor particles combine with each other and / or with other particles of the raw material to form the ceramic materials.
- a closed form is to be understood in particular to mean a shape which, with the exception of an injection opening and, if appropriate, of ventilation openings, is completely closed.
- the mold consists of at least two sections, which can be assembled into the mold.
- the injection of the raw material is expediently carried out in the assembled state of the sections.
- the release of the blank from the mold expediently involves opening the mold, which comprises, for example, removal of at least one first portion.
- the blank is removed after removing at least the first portion from the other or one of the other portions.
- the mold expediently encloses an interior which has the shape of the luminescence conversion element to be produced.
- the molding of the blank is advantageously carried out by injection into the mold, which has a correspondingly shaped interior.
- luminescence conversion elements of various shapes can be produced in a simple manner using the method. For example, by injecting the raw material into the correspondingly shaped interior of the mold, a blank is formed which has the shape of a dome or cap having a lid portion and at least one side wall.
- the mold is designed such that by means of the injection of the raw material, a blank is formed whose outer surface has a convexly curved partial region and / or a concavely curved partial region.
- a luminescence conversion element is produced which has a convex or concave lens, for example a plano-convex or plano-concave lens.
- a raw material which contains, in addition to the phosphor particles, additional particles without wavelength-converting properties.
- the additional particles are aluminum oxide particles, aluminum nitride particles and / or boron nitride particles.
- the additional particles expediently remain as part of the ceramic material in the finished luminescence conversion element. In particular, they combine with each other and / or with the phosphor particles to form the ceramic material.
- the raw material has phosphor particles which have an average particle diameter of less than or equal to 5 ⁇ m and in particular less than or equal to 1 ⁇ m.
- the average particle diameter is greater than or equal to 500 nm.
- the phosphor particles combine with one another and / or with further particles of the raw material during sintering to form particles having an average particle diameter of greater than or equal to 1 .mu.m, in particular greater than or equal to 5 ⁇ m.
- the additional particles have an average particle diameter of less than or equal to 1 .mu.m, in particular of less than or equal to 500 nm.
- the average particle diameter of the additional particles, which have no wavelength-converting properties is greater than or equal to 200 nm.
- the binder material contains an acrylate, a polyolefin, a polyol and / or silicone or consists of at least one of these materials.
- binder materials are suitable for being removed from the blank by means of a solvent, by means of catalytic decomposition and / or by means of thermal decomposition.
- the binder material is preferably completely removed from the blank. But it is also possible that residues of the binder material remain in the blank.
- FIG. 3 shows a schematic sectional illustration of a luminescence conversion element according to a further exemplary embodiment
- the provided raw material 1 is transported by means of a tool 2, to a mold 3.
- the raw material 1 is heated, so that the binder material melts and the raw material passes into a flowable state.
- the tool 2 has, for example, a storage container for the raw material, a heated tube with a screw conveyor and a die 3 facing nozzle.
- the raw material 1 is transported from the reservoir through the heated tube where the binder material is melted to the nozzle.
- the raw material is heated, for example, to a temperature between 100 0 C and 200 0 C.
- the mold 3 is also heated to a temperature between 100 0 C and 200 0 C.
- the mold 3 has at least one ventilation duct, through which air or another gas contained in the interior 30 before injection can escape during the injection of the raw material 1 into the interior 30.
- a blank is produced which has the shape of the interior 30 of the mold 3.
- the blank is subsequently released from the mold 3.
- cooling of the mold 3 with the blank to a lower temperature than intended for injection can be expedient, for example to increase the stability of the blank.
- FIG. 2 shows a schematic perspective view of the luminescence conversion element 4 produced by the method on the basis of the exemplary embodiment of FIG.
- the luminescence conversion element 4 has the shape of a cap.
- the cap has a lid portion 41 with a central region 400 laterally surrounded by four outer walls 42.
- the lid portion 41 and the side walls 42 extending perpendicular to the lid portion 41 define an interior of the cap 4.
- the exposed corner region of the semiconductor chip 6 has an electrical connection surface 60, in particular a bond pad, on its surface facing away from the leadframe 7.
- a bonding wire 8 connects the bonding pad 60 to a second portion of the electrical lead frame 7, which is electrically isolated from the first portion.
- the assembly of the provided with the recess 43 Lumineszenzkonversionselements 4 before or after the electrical see contacting the semiconductor chip 6 by means of the bonding wire 8 done.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Led Device Packages (AREA)
- Luminescent Compositions (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008052751A DE102008052751A1 (de) | 2008-10-22 | 2008-10-22 | Verfahren zum Herstellen eines Lumineszenzkonversionselements, Lumineszenzkonversionselement und optoelektronisches Bauteil |
| PCT/DE2009/001378 WO2010045915A1 (de) | 2008-10-22 | 2009-09-29 | Verfahren zum herstellen eines lumineszenzkonversionselements, lumineszenzkonversionselement und optoelektronisches bauteil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2351462A1 true EP2351462A1 (de) | 2011-08-03 |
| EP2351462B1 EP2351462B1 (de) | 2014-08-13 |
Family
ID=41506535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09744319.6A Not-in-force EP2351462B1 (de) | 2008-10-22 | 2009-09-29 | Verfahren zum herstellen eines lumineszenzkonversionselements, insbesondere eines optoelektronischen bauteils |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20120326186A2 (de) |
| EP (1) | EP2351462B1 (de) |
| DE (1) | DE102008052751A1 (de) |
| TW (1) | TWI388074B (de) |
| WO (1) | WO2010045915A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008052751A1 (de) | 2008-10-22 | 2010-04-29 | Osram Opto Semiconductors Gmbh | Verfahren zum Herstellen eines Lumineszenzkonversionselements, Lumineszenzkonversionselement und optoelektronisches Bauteil |
| DE102010050832A1 (de) * | 2010-11-09 | 2012-05-10 | Osram Opto Semiconductors Gmbh | Lumineszenzkonversionselement, Verfahren zu dessen Herstellung und optoelektronisches Bauteil mit Lumineszenzkonversionselement |
| DE102011012298A1 (de) | 2010-12-28 | 2012-06-28 | Osram Opto Semiconductors Gmbh | Verbundsubstrat, Halbleiterchip mit Verbundsubstrat und Verfahren zur Herstellung von Verbundsubstraten und Halbleiterchips |
| DE102011050450A1 (de) | 2011-05-18 | 2012-11-22 | Osram Opto Semiconductors Gmbh | Optoelektronischer Halbleiterchip, optoelektronisches Halbleiterbauelement und Verfahren zur Herstellung eines optoelektronischen Halbleiterbauelements |
| WO2013112435A1 (en) | 2012-01-24 | 2013-08-01 | Cooledge Lighting Inc. | Light - emitting devices having discrete phosphor chips and fabrication methods |
| US8896010B2 (en) | 2012-01-24 | 2014-11-25 | Cooledge Lighting Inc. | Wafer-level flip chip device packages and related methods |
| US8907362B2 (en) | 2012-01-24 | 2014-12-09 | Cooledge Lighting Inc. | Light-emitting dies incorporating wavelength-conversion materials and related methods |
| DE102012112149A1 (de) | 2012-12-12 | 2014-06-26 | Osram Opto Semiconductors Gmbh | Optoelektronisches Halbleiterbauelement und Verfahren zur Herstellung eines optoelektronischen Halbleiterbauelements |
| US9343443B2 (en) | 2014-02-05 | 2016-05-17 | Cooledge Lighting, Inc. | Light-emitting dies incorporating wavelength-conversion materials and related methods |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19638667C2 (de) * | 1996-09-20 | 2001-05-17 | Osram Opto Semiconductors Gmbh | Mischfarbiges Licht abstrahlendes Halbleiterbauelement mit Lumineszenzkonversionselement |
| DE29724847U1 (de) | 1996-06-26 | 2004-09-30 | Osram Opto Semiconductors Gmbh | Lichtabstrahlendes Halbleiterbauelement mit Lumineszenzkonversionselement |
| DE19964252A1 (de) | 1999-12-30 | 2002-06-06 | Osram Opto Semiconductors Gmbh | Oberflächenmontierbares Bauelement für eine LED-Weißlichtquelle |
| US7554258B2 (en) * | 2002-10-22 | 2009-06-30 | Osram Opto Semiconductors Gmbh | Light source having an LED and a luminescence conversion body and method for producing the luminescence conversion body |
| DE10258193B4 (de) * | 2002-12-12 | 2014-04-10 | Osram Opto Semiconductors Gmbh | Verfahren zum Herstellen von Leuchtdioden-Lichtquellen mit Lumineszenz-Konversionselement |
| DE10261365B4 (de) * | 2002-12-30 | 2006-09-28 | Osram Opto Semiconductors Gmbh | Optoelektronisches Bauelement mit einer Mehrzahl von strahlungsemittierenden Halbleiterchips |
| US7306823B2 (en) * | 2004-09-18 | 2007-12-11 | Nanosolar, Inc. | Coated nanoparticles and quantum dots for solution-based fabrication of photovoltaic cells |
| US7517728B2 (en) * | 2004-03-31 | 2009-04-14 | Cree, Inc. | Semiconductor light emitting devices including a luminescent conversion element |
| US7553683B2 (en) * | 2004-06-09 | 2009-06-30 | Philips Lumiled Lighting Co., Llc | Method of forming pre-fabricated wavelength converting elements for semiconductor light emitting devices |
| CN101129095B (zh) * | 2005-02-17 | 2014-07-09 | 皇家飞利浦电子股份有限公司 | 包括发绿光的陶瓷发光转换器的照明系统 |
| DE102005009066A1 (de) * | 2005-02-28 | 2006-09-07 | Osram Opto Semiconductors Gmbh | Verfahren zur Herstellung eines optischen und eines strahlungsemittierenden Bauelementes und optisches sowie strahlungsemittierendes Bauelement |
| JP5490407B2 (ja) * | 2005-03-14 | 2014-05-14 | コーニンクレッカ フィリップス エヌ ヴェ | 多結晶セラミック構造の蛍光体、及び前記蛍光体を有する発光素子 |
| US8829779B2 (en) * | 2006-03-21 | 2014-09-09 | Koninklijke Philips N.V. | Electroluminescent device |
| EP2087530A1 (de) * | 2006-11-10 | 2009-08-12 | Philips Intellectual Property & Standards GmbH | Beleuchtungssystem mit einem monolithischen keramischen lumineszenzumwandler |
| JP5575488B2 (ja) * | 2007-02-07 | 2014-08-20 | コーニンクレッカ フィリップス エヌ ヴェ | 合成モノリシックセラミック発光変換体を含む照明システム |
| DE102008052751A1 (de) | 2008-10-22 | 2010-04-29 | Osram Opto Semiconductors Gmbh | Verfahren zum Herstellen eines Lumineszenzkonversionselements, Lumineszenzkonversionselement und optoelektronisches Bauteil |
-
2008
- 2008-10-22 DE DE102008052751A patent/DE102008052751A1/de not_active Withdrawn
-
2009
- 2009-09-29 US US13/124,744 patent/US20120326186A2/en not_active Abandoned
- 2009-09-29 WO PCT/DE2009/001378 patent/WO2010045915A1/de not_active Ceased
- 2009-09-29 EP EP09744319.6A patent/EP2351462B1/de not_active Not-in-force
- 2009-10-20 TW TW098135333A patent/TWI388074B/zh not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010045915A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010045915A1 (de) | 2010-04-29 |
| US20120326186A2 (en) | 2012-12-27 |
| DE102008052751A1 (de) | 2010-04-29 |
| TW201032358A (en) | 2010-09-01 |
| EP2351462B1 (de) | 2014-08-13 |
| US20110260193A1 (en) | 2011-10-27 |
| TWI388074B (zh) | 2013-03-01 |
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