EP1532694A2 - Method for producing an electromagnetic radiation-emitting semiconductor chip and a corresponding electromagnetic radiation-emitting semiconductor chip - Google Patents
Method for producing an electromagnetic radiation-emitting semiconductor chip and a corresponding electromagnetic radiation-emitting semiconductor chipInfo
- Publication number
- EP1532694A2 EP1532694A2 EP03750286A EP03750286A EP1532694A2 EP 1532694 A2 EP1532694 A2 EP 1532694A2 EP 03750286 A EP03750286 A EP 03750286A EP 03750286 A EP03750286 A EP 03750286A EP 1532694 A2 EP1532694 A2 EP 1532694A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- semiconductor chip
- substrate
- out layer
- transparent coupling
- 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- Withdrawn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
- 239000004065 semiconductor Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 11
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 20
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- ZGNPLWZYVAFUNZ-UHFFFAOYSA-N tert-butylphosphane Chemical compound CC(C)(C)P ZGNPLWZYVAFUNZ-UHFFFAOYSA-N 0.000 claims description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052733 gallium Inorganic materials 0.000 claims description 3
- 125000002524 organometallic group Chemical group 0.000 claims description 3
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 claims description 3
- 238000000927 vapour-phase epitaxy Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 9
- 229910005540 GaP Inorganic materials 0.000 description 5
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 5
- 230000005670 electromagnetic radiation Effects 0.000 description 4
- 238000005253 cladding Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 3
- 238000000407 epitaxy Methods 0.000 description 3
- 229910000980 Aluminium gallium arsenide Inorganic materials 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- HZXMRANICFIONG-UHFFFAOYSA-N gallium phosphide Chemical compound [Ga]#P HZXMRANICFIONG-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
Classifications
-
- H01L33/30—
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02367—Substrates
- H01L21/0237—Materials
- H01L21/02373—Group 14 semiconducting materials
- H01L21/02381—Silicon, silicon germanium, germanium
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02538—Group 13/15 materials
- H01L21/02543—Phosphides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
- H01L21/02617—Deposition types
- H01L21/0262—Reduction or decomposition of gaseous compounds, e.g. CVD
-
- H01L33/0066—
Definitions
- the invention relates to a method for producing an electromagnetic radiation-emitting semiconductor chip based on AlGalnP, comprising the method steps: providing a substrate; Applying a semiconductor layer sequence to the substrate which contains a photon emitting active layer; and application of a transparent coupling-out layer, in particular a coupling-out layer, which comprises Ga x (In y Al 1 _ y ) ⁇ _ x P with 0.8 ⁇ x and 0 ⁇ y ⁇ 1, in particular GaP.
- the invention also relates to an electromagnetic
- Radiation-emitting semiconductor chip based on AlGalnP with a substrate, a semiconductor layer sequence applied to the substrate with a photon-emitting active layer and a transparent coupling-out layer arranged on the active layer, which comprises GaP.
- the materials based on InGaAlP include in particular all mixed crystals with a composition which falls under the formula Ga x (In y Al ⁇ - y ) ⁇ .
- x P with O ⁇ x ⁇ l, O ⁇ y ⁇ l and x + y ⁇ 1 falls.
- the AlGalnP-based semiconductor chips emitting electromagnetic radiation include all semiconductor chips in which the semiconductor layer sequence in which an electromagnetic radiation-generating layer is located has at least a substantial proportion of material based on InGaAlP and the properties of the radiation emitted by the semiconductor chip from the latter material based on InGaAlP are at least essentially determined.
- This material based on InGaAlP does not necessarily have to have a mathematically exact composition according to the above formula. Rather, it can have one or more dopants and additional constituents.
- the AlGalnP material system is very interesting for use in light-emitting diodes, since its band gap can be adjusted over a wide range from 1.9 eV to 2.2 eV by varying the AI component. This means that LEDs can be made from this material in the color range from red to green.
- a substrate for the epitaxy of light-emitting diodes based on AlGalnP should meet the following conditions:
- GaAs substrates All of the above conditions are met by GaAs substrates. Therefore GaAs is used worldwide as a substrate for AlGalnP light emitting diodes. From the point of view of economical manufacture of the light-emitting diodes, GaAs substrates have the disadvantage that they are very expensive and contain arsenic. Other substrate materials either have a large lattice mismatch or are not sufficiently suitable for the common process steps.
- the invention is therefore based on the object of providing a method of the type mentioned at the outset which allows a technically simple and inexpensive production of a radiation-emitting semiconductor chip based on AlGalnP.
- An electromagnetic radiation-emitting semiconductor chip which can be produced by the method according to the invention is the subject of claim 9.
- Advantageous refinements and developments of the semiconductor chip according to the invention are the subject of subclaims 10 and 11.
- the substrate in a production method of the type mentioned at the outset, the substrate essentially has germanium and the transparent coupling-out layer is applied at low temperature.
- Germanium has a lattice constant that is well compatible with the AlGalnP and AlGaAs material systems and is commercially available in high quality.
- the price for a germanium substrate is only about half the price for a GaAs substrate, so that there is great potential for savings in the manufacturing process.
- the lower thermal stability of germanium compared to GaAs is taken into account by carrying out the particularly critical step of growing the transparent coupling-out layer comprising gallium phosphide at a low temperature at which the germanium substrate still has sufficient strength and a low vapor pressure.
- the transparent coupling-out layer is applied using tertiary butylphosphine (TBP, (C 4 H 9 ) PH 2 ) as the phosphorus source.
- TBP tertiary butylphosphine
- Conventional AlGalnP-based light emitting diodes typically use a light decoupling layer made of GaP, which is deposited epitaxially using phosphine (PH 3 ) at a temperature above 800 ° C. Such temperatures in the reactor are too high for processes with germanium substrates.
- the use of tertiary butylphosphine as the phosphorus source enables a high quality light decoupling layer to be deposited at significantly lower process temperatures.
- the transparent coupling-out layer at a temperature below 780 ° C., preferably below 750 ° C.
- the transparent coupling-out layer is applied at a temperature of approximately 700 ° C.
- the thickness of the coupling-out layer is then chosen between approximately 1 ⁇ m and approximately 10 ⁇ m, preferably between approximately 2 ⁇ m and approximately 10 ⁇ m.
- the transparent coupling-out layer is grown by means of organometallic gas phase epitaxy (MOVPE).
- MOVPE organometallic gas phase epitaxy
- the V / III ratio is advantageously set to a value of 5 to 20, preferably about 10. Further advantageous refinements, features and details of the invention result from the dependent claims, the description of the exemplary embodiment and the drawing.
- the single figure shows a schematic representation of a sectional view of a radiation-emitting semiconductor chip according to an embodiment of the invention.
- FIG. 1 shows a sectional view of a light-emitting diode chip 10, generally designated 10 and based on AlGalnP, in a schematic representation.
- the light-emitting diode chip 10 comprises a germanium substrate 12, on which a semiconductor layer sequence 14 is formed.
- the semiconductor layer sequence 14 is a double heterostructure which has an active, photon-emitting AlGalnP-based n-type layer 22, which consists of an AlGalnP-based n-type cladding layer below the active layer and an AlGalnP-based p-type cladding layer above the active layer is included.
- Such structures and layer sequences are known to the person skilled in the art and are therefore not explained in more detail here.
- the layers mentioned are doped to the desired impurity content with suitable p-dopants such as Zn, C or Mg or with suitable n-dopants such as Te, Se, S and Si.
- the active semiconductor layer sequence 14 can alternatively have a multi-quantum well structure, as is also known, for example, from the prior art.
- a thick light decoupling layer 16 made of Ga x (In y Al x - y ) ⁇ _ x P with 0.8 ⁇ x and 0 ⁇ y ⁇ 1 or GaP is applied to the p-type AlGalnP cladding layer. Since the band gap of the coupling-out layer is larger than that of the active layer, it is
- Light decoupling layer 16 is transparent to electromagnetic radiation generated in the active layer sequence 14.
- the current required for the operation of the light-emitting diode chip is supplied to the active layer of the light-emitting diode chip 10 in the present case via a front-side contact 18 and a rear-side contact 20.
- the contacts can also be arranged differently than shown in the exemplary embodiment.
- the light decoupling layer 16 is applied by means of organometallic vapor phase epitaxy (OMVPE).
- OMVPE organometallic vapor phase epitaxy
- TBP Tertiary butylphosphine
- trimethylgallium is used as the gallium source, and a V / III flow ratio of about 10 is selected.
- the growth temperature is 720 ° C., a temperature at which the germanium substrate in the reactor is still sufficiently solid.
- the layer sequence 14 has a cross section of 250 ⁇ m ⁇ 250 ⁇ m and a layer thickness between 2 and 10 ⁇ m.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Led Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10239045 | 2002-08-26 | ||
DE10239045A DE10239045A1 (en) | 2002-08-26 | 2002-08-26 | Method for producing an electromagnetic radiation-emitting semiconductor chip and electromagnetic radiation-emitting semiconductor chip |
PCT/DE2003/002786 WO2004021457A2 (en) | 2002-08-26 | 2003-08-21 | Method for producing an electromagnetic radiation-emitting semiconductor chip and a corresponding electromagnetic radiation-emitting semiconductor chip |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1532694A2 true EP1532694A2 (en) | 2005-05-25 |
Family
ID=31501947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03750286A Withdrawn EP1532694A2 (en) | 2002-08-26 | 2003-08-21 | Method for producing an electromagnetic radiation-emitting semiconductor chip and a corresponding electromagnetic radiation-emitting semiconductor chip |
Country Status (7)
Country | Link |
---|---|
US (1) | US7195991B2 (en) |
EP (1) | EP1532694A2 (en) |
JP (1) | JP2005536896A (en) |
CN (1) | CN100420042C (en) |
DE (1) | DE10239045A1 (en) |
TW (1) | TWI224399B (en) |
WO (1) | WO2004021457A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI460881B (en) | 2006-12-11 | 2014-11-11 | Univ California | Transparent light emitting diodes |
JP5346443B2 (en) * | 2007-04-16 | 2013-11-20 | ローム株式会社 | Semiconductor light emitting device and manufacturing method thereof |
DE102018110187A1 (en) * | 2018-04-27 | 2019-10-31 | Osram Opto Semiconductors Gmbh | Optoelectronic semiconductor body, arrangement of a plurality of optoelectronic semiconductor bodies and method for producing an optoelectronic semiconductor body |
US11592166B2 (en) | 2020-05-12 | 2023-02-28 | Feit Electric Company, Inc. | Light emitting device having improved illumination and manufacturing flexibility |
US11876042B2 (en) | 2020-08-03 | 2024-01-16 | Feit Electric Company, Inc. | Omnidirectional flexible light emitting device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5129636B1 (en) * | 1970-12-25 | 1976-08-26 | ||
GB1582063A (en) * | 1976-11-22 | 1980-12-31 | Mitsubishi Monsanto Chem | Electroluminescent element and method of fabricating the same |
US5003548A (en) * | 1988-09-21 | 1991-03-26 | Cornell Research Foundation, Inc. | High power (1,4 W)AlGaInP graded-index separate confinement heterostructure visible (λ-658 nm) laser |
US5233204A (en) * | 1992-01-10 | 1993-08-03 | Hewlett-Packard Company | Light-emitting diode with a thick transparent layer |
JP3809464B2 (en) * | 1999-12-14 | 2006-08-16 | 独立行政法人理化学研究所 | Method for forming semiconductor layer |
WO2002009242A2 (en) * | 2000-07-21 | 2002-01-31 | Motorola, Inc. | Optical structure on compliant substrate |
TW515106B (en) * | 2000-09-13 | 2002-12-21 | Toshiba Corp | Bipolar transistor, semiconductor light emitting device and semiconductor device |
-
2002
- 2002-08-26 DE DE10239045A patent/DE10239045A1/en not_active Withdrawn
-
2003
- 2003-08-21 CN CNB038202603A patent/CN100420042C/en not_active Expired - Fee Related
- 2003-08-21 WO PCT/DE2003/002786 patent/WO2004021457A2/en active Application Filing
- 2003-08-21 TW TW092122994A patent/TWI224399B/en not_active IP Right Cessation
- 2003-08-21 JP JP2004531691A patent/JP2005536896A/en active Pending
- 2003-08-21 EP EP03750286A patent/EP1532694A2/en not_active Withdrawn
- 2003-08-21 US US10/524,186 patent/US7195991B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO2004021457A2 * |
Also Published As
Publication number | Publication date |
---|---|
US7195991B2 (en) | 2007-03-27 |
DE10239045A1 (en) | 2004-03-11 |
TW200405584A (en) | 2004-04-01 |
US20060003467A1 (en) | 2006-01-05 |
CN1679176A (en) | 2005-10-05 |
WO2004021457A3 (en) | 2004-12-23 |
CN100420042C (en) | 2008-09-17 |
WO2004021457A2 (en) | 2004-03-11 |
TWI224399B (en) | 2004-11-21 |
JP2005536896A (en) | 2005-12-02 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20041227 |
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Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
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RBV | Designated contracting states (corrected) |
Designated state(s): DE |
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17Q | First examination report despatched |
Effective date: 20070326 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM OPTO SEMICONDUCTORS GMBH |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM OPTO SEMICONDUCTORS GMBH |
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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: 20111123 |