EP3069389A1 - Succession de couches de semi-conducteurs et procédé de fabrication de celle-ci - Google Patents

Succession de couches de semi-conducteurs et procédé de fabrication de celle-ci

Info

Publication number
EP3069389A1
EP3069389A1 EP14799686.2A EP14799686A EP3069389A1 EP 3069389 A1 EP3069389 A1 EP 3069389A1 EP 14799686 A EP14799686 A EP 14799686A EP 3069389 A1 EP3069389 A1 EP 3069389A1
Authority
EP
European Patent Office
Prior art keywords
radiation
active
semiconductor layer
layer sequence
tubes
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Withdrawn
Application number
EP14799686.2A
Other languages
German (de)
English (en)
Inventor
Jens Ebbecke
Claudia Kauss
Petrus Sundgren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ams Osram International GmbH
Original Assignee
Osram Opto Semiconductors GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Osram Opto Semiconductors GmbH filed Critical Osram Opto Semiconductors GmbH
Publication of EP3069389A1 publication Critical patent/EP3069389A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
    • H01L33/08—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a plurality of light emitting regions, e.g. laterally discontinuous light emitting layer or photoluminescent region integrated within the semiconductor body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/005—Processes
    • H01L33/0062—Processes for devices with an active region comprising only III-V compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
    • H01L33/025—Physical imperfections, e.g. particular concentration or distribution of impurities
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
    • H01L33/04—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a quantum effect structure or superlattice, e.g. tunnel junction
    • H01L33/06—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a quantum effect structure or superlattice, e.g. tunnel junction within the light emitting region, e.g. quantum confinement structure or tunnel barrier
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
    • H01L33/26—Materials of the light emitting region
    • H01L33/30—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table

Definitions

  • This task is among others by a
  • the semiconductor layer sequence is a radiation-active layer sequence, also as a radiation-active structure
  • bezeichbar in particular for a light emitting diode, short LED, or for a laser diode, short LD.
  • the semiconductor layer sequence is preferably based on a III-V compound semiconductor material.
  • the semiconductor material is, for example, a nitride compound semiconductor material such as Al n In] __ n _ m Ga m N or a phosphide compound semiconductor material such as Al n In] __ n _ m Ga m P or an arsenide compound semiconductor material as Al n In ] __ n _ m Ga m As, where each 0 ⁇ n ⁇ 1, 0 ⁇ m ⁇ 1 and n + m -S 1 is.
  • the semiconductor layer sequence may have dopants and additional constituents.
  • the n-side has one or, preferably, multiple layers of
  • the p-side may consist of one or more layers of the
  • Semiconductor layer sequence at least one active zone.
  • the active zone is between the n-side and the p-side.
  • the active zone is set up to simultaneously generate a first radiation having a first wavelength and a second radiation having a second wavelength.
  • the wavelength of the corresponding radiation is here and below referred to in each case as the wavelength of an emission band at which a highest photometric power is present. In English, this wavelength is also called Peak Wavelength.
  • the active zone comprises one or, preferably, a plurality of radiation-active layers.
  • the at least one radiation-active layer is preferred as so-called quantum well or potential well, in particular as a two-dimensional quantum well or
  • the at least one radiation-active layer has a first material composition. If several radiation-active layers are present, then preferably all the radiation-active layers are within the framework of the
  • the at least one radiation-active layer is set up to generate the first radiation. If several radiation-active layers of different material compositions are present, then the respective layers can have radiation with different
  • the at least one radiation-active layer is perpendicular or approximately perpendicular to a growth direction of the
  • the growth direction forms a solder to the at least one radiation-active layer.
  • the radiation-active hoses may be a second material composition and / or another Having lattice structure as the radiation-active layer.
  • the second material composition of the radiation-active tubes is different from the first material composition of the at least one radiation-active layer.
  • the radiation-active hoses are set up to generate the second radiation.
  • the hoses are designed in particular as one-dimensional quantum wells.
  • radiation-active tubes oriented parallel or substantially parallel to the growth direction.
  • Substantially parallel means, for example, an average deviation from the growth direction of at most 5 ° or at most 2 °.
  • the radiation-active hoses can, in the context of
  • Material compositions It is possible that a material composition of the radiation-active tubes changes along the growth direction.
  • the active zone is configured to simultaneously generate a first radiation having a first wavelength and a second radiation having a second wavelength, the first wavelength being different from the second wavelength.
  • the active zone has at least one
  • the at least one radiation-active layer is perpendicular to a growth direction of
  • the active zone comprises a plurality of radiation-active tubes having a second material composition for generating the second radiation, wherein the second material composition is different from the first material composition.
  • the radiation active hoses are parallel to the
  • a spectral emission of light-emitting diodes is generally spectrally narrow-band.
  • the light of light-emitting diodes usually has a comparatively low color rendering index.
  • Semiconductor layer sequence has an active zone two
  • a two-dimensional quantum well structure in the form of at least one radiation-active layer and a one-dimensional or even a zero-dimensional
  • the main components of the semiconductor layer sequence are then In, Al, Ga, P and / or As.
  • Other ingredients are preferably only in
  • the radiation-active tubes completely penetrate the active zone in the direction parallel to the growth direction.
  • the at least one radiation-active layer is formed from In x AlyGa] _ x -yP. Where 0.40 ⁇ x or 0.45 ⁇ x or 0.50 ⁇ x. Alternatively or additionally, x ⁇ 0.58 or x ⁇ 0.65 or x ⁇ 0.72. Further is preferably 0 -S y or 0.05 -S y or 0.1 -S y or 0.2 ⁇ y and / or y ⁇ 0.3 or y ⁇ 0.4 or y ⁇ 0.5.
  • radiation-active hoses of In a AlkGa] _- a -bP formed preferably 0.2 ⁇ a or 0.5 -S a or 0.55 -S a.
  • a-S 0.6 or a -S-0.7 or a -S-0.8 applies.
  • radiation-active tubes have an average diameter of at least 1 nm or 5 nm or 10 nm. Alternatively or additionally, a mean diameter of the
  • the lateral dimension of the semiconductor layer sequence is, for example, at least 100 ⁇ m or 250 ⁇ m or 500 ⁇ m.
  • radiation-active hoses to a mean surface density of at least 10 ⁇ l / cm ⁇ or 10 ⁇ l / cm ⁇ or 10 ⁇ l / cm ⁇ on.
  • the mean surface density of the radiation-active hoses is at most 10.sup.-1 / cm.sup.2 or 1.sup.H.sub.l / cm.sup.2 or 10.sup.-1 / cm.sup.-1.
  • an average thickness of the at least one radiation-active layer is at least 2 nm or 3 nm or 4.5 nm.
  • the average thickness is at most 15 nm or 12 nm or 9 nm.
  • an average diameter of the radiation-active tubes is of the same order of magnitude as an average thickness of the radiation-active layer. The term in the same
  • the order of magnitude may mean that the average thickness differs from the average diameter by at most a factor of 5 or 2.
  • the first one lies
  • Wavelength at least 570 nm or 580 nm and / or at most 605 nm or 595 nm. In other words, then the first wavelength is yellow and / or orange
  • the first wavelength for example, in the blue
  • Spectral range is at least 420 nm or 440 nm or 460 nm and / or at most 490 nm or 480 nm or 470 nm.
  • the first wavelength can be in the green spectral range, for example at least 515 nm or 525 nm and / or at most 555 nm or 545 nm.
  • the second is
  • Wavelength in the red spectral range for example at least 610 nm or 620 nm and / or at most 700 nm or 680 nm or 660 nm. If the first wavelength lies in the blue spectral range, the second wavelength may also lie in the green or yellow-orange spectral range.
  • a difference between the first and the second wavelength is included at least 25 nm or 40 nm or 55 nm. Alternatively or additionally, this difference is at most 150 nm or 120 nm or 80 nm. According to at least one embodiment, the second is
  • radiation-active hoses on a smaller band gap than the at least one radiation-active layer. Due to the small volume of the radiation-active hoses, absorption of radiation of the first wavelength in the radiation-active hoses is greatly reduced.
  • the method comprises the following steps, preferably in the order given:
  • the method may include further steps for finishing an optoelectronic semiconductor chip, such as the
  • the growth substrate is not removed from the semiconductor layer sequence and remains in the finished optoelectronic semiconductor chip.
  • the growth substrate may also be replaced by a carrier substrate.
  • the at least one growth substrate is one of a main side during the growth of the semiconductor layer sequence
  • Substrate carrier attached.
  • Semiconductor layer sequence for example, based on photolithography, electron beam lithography or interference lithography, preferably followed by a wet chemical or
  • Source of impurity a source of condensation nuclei of materials used for epitaxy.
  • impurities can be added to an epitaxy reactor in a targeted manner, in which a condensation or reaction of
  • Precursor molecules in particular for an organometallic gas phase epitaxy short MOVCD takes place.
  • condensation nuclei it may be possible for the growth of the semiconductor layer sequence on the growth substrate
  • Defects or defects in the semiconductor layer sequence are generated. Starting from these defects in the Semiconductor layer sequence, it is then possible that the radiation-active tubes grow.
  • the impurity source is only at the beginning of the growth of the impurity source
  • the impurity source does not generate any
  • the middle one is the middle one
  • the tubes begin directly on the growth substrate or on and / or in a buffer layer.
  • the buffer layer is in particular a
  • the hoses are radiation-active only in the active zone.
  • the active zone extends, for example, perpendicular to the growth direction and, in particular, includes regions which are between one of the first and last active in radiation along the direction of growth
  • the radiation-active tubes lie. Alternatively, it is possible for the radiation-active tubes to emit the second radiation even in regions outside the active zone.
  • the growth substrate is a GaAs substrate.
  • the buffer layer which is formed, for example, from InGaAlP, is preferably grown directly on the growth substrate.
  • the buffer layer follows an n-cladding layer.
  • the n-cladding layer is formed of InAlP.
  • the n-cladding layer is formed of InAlP.
  • the active zone is applied directly or indirectly to the n-cladding layer.
  • the active zone has a plurality of the radiation-active layers, for example at least 2 or 10 or at least 20 and / or at most 250 or 150 or 100 or 75.
  • the barrier layers are formed from InAlGaP.
  • all radiation-active layers preferably have the same material compositions and layer thicknesses, as can be the case for the barrier layers.
  • the active zone follows a p-type cladding layer along the growth direction.
  • the p-type cladding layer is formed of p-doped InGaAlP, for example.
  • a contact layer is directly or indirectly on the p-cladding layer
  • the contact layer may be formed of InGaAlP.
  • FIGS 1 and 2 are schematic representations of
  • FIG. 4 is a schematic representation of one here
  • FIG. 1 shows a perspective illustration of an optoelectronic semiconductor chip 1. On one
  • Growth substrate 14 is a semiconductor layer sequence 10 grew up.
  • the semiconductor layer sequence 10 comprises an n-side 11 and a p-side 13. Between the n-side 11 and the p-side 13 is an active zone 2, the
  • the semiconductor chip 1 includes at least one radiation-active layer 21. Facing away from the growth substrate 14 is a main radiation side 25 of the semiconductor chip 1.
  • the semiconductor layer sequence 10 includes a
  • the tubes 22 are parallel to a growth direction z of
  • the tubes 22 may have a slightly meandering course and a main extension direction of the tubes 22 may deviate slightly from the growth direction z.
  • the hoses 22 completely penetrate the active zone 2.
  • semiconductor chips 1 shown in a schematic sectional view.
  • the semiconductor layer sequence 10 is based on the material system InAlGaP / InAlGaAs.
  • the semiconductor chip 1 comprises as the growth substrate 14 a GaAs substrate. On a main side 40 of the growth substrate 14, a buffer layer 15 is deposited. A thickness of the buffer layer 15 is for example 500 nm.
  • Buffer layer 15 is formed of GaAs, for example.
  • the buffer layer 15 follows an n-cladding layer 16 after.
  • a thickness of the n-cladding layer is, for example, 3 ym.
  • the n-type cladding layer 16 may be based on InAlP.
  • the layers 15, 16 form the n-side 11.
  • the active zone 2 has grown.
  • the active zone 2 comprises a multiplicity of alternating radiation-active layers 21 and barrier layers 23.
  • the radiation-active layers 21 formed as quantum wells are formed, for example, from AlInGaP.
  • a thickness of the radiation-active layers 21 is, for example, 6 nm.
  • the barrier layers 23 are likewise formed from AlInGaP and may likewise have a thickness of 6 nm.
  • the active zone 2 is followed by a p-type cladding layer 17.
  • the p-type cladding layer 17 has a thickness of approximately 1.7 ⁇ m.
  • the p-cladding layer is formed approximately from InGaAlP.
  • the p-type cladding layer 17 follows a contact layer 18 after.
  • a thickness of the contact layer 18 is included, for example
  • the layers 17, 18 form the p-side 13.
  • a roughening is optionally formed to improve radiation decoupling.
  • a metallization 5 for energizing the semiconductor layer sequence 10 may be located on the main radiation side 25, a metallization 5 for energizing the semiconductor layer sequence 10 may be located.
  • electrical contact structures such as bond pads,
  • the tubes 22 extend continuously into the p-side 13, for example up to or into the contact layer 18.
  • the tubes 22 assume an origin, for example
  • the tubes 22 can thus begin directly on a main side 40 of the growth substrate 14 or first at a distance from the main side 40 in the
  • the tubes 22 grow with a different material composition than the radiation active layers 21. Due to the different material composition, the tubes 22 emit in a different spectral range.
  • the tubes 22 may be considered as one-dimensional structures.
  • a mean diameter of the tubes 22 is, for example, at most 100 nm or 50 nm or
  • the n-side 11 is closer to the growth substrate 14 than the p-side 13.
  • the p-side 13 may be closer to the growth substrate 14 than the n-side 11.
  • Semiconductor layer sequence 10 is to be adapted accordingly in this case.
  • the radiation-active layers 21 emit in the yellow-orange spectral range a first radiation at a first
  • Wavelength LI The first wavelength LI is approximately 590 nm.
  • a second radiation having a second wavelength L2 is emitted.
  • the second wavelength L2 is approximately 650 nm. Due to the two-color emission of the semiconductor layer sequence 10 is in particular a color rendering index of the
  • Semiconductor chips 1 generated radiation can be increased.
  • the semiconductor layer sequence is based on AlInGaN, for example, such that the first wavelength is approximately 470 nm, for example, and the second wavelength is approximately 570 nm in the yellow spectral range.
  • the material compositions of the tubes 22 and the radiation-active layers 21 can be determined by the following
  • the content of indium which is decisive in particular for the emission wavelength, can be set by a growth temperature and by an amount of an indium precursor added.
  • FIG. 4 schematically shows a structured one
  • Defects 3 are generated by a structuring of the main side 40 of the growth substrate 14.
  • the impurities 3 are generated, for example, by a material removal,
  • the impurities 3 are then holes or recesses in the growth substrate 14. Likewise, the impurity 3 by a
  • the impurities are formed in this case by elevations or islands on the main page 40.
  • the impurities 3 then have a different material from the growth substrate 14. Suitable materials are in particular metals such as gold or semiconductor materials such as InAs in question.
  • Per impurity 3 is preferably exactly one of
  • a density of the impurities 3 on the main side 40 thus corresponds approximately to a density of the radiation-active tubes 22 in the finally grown semiconductor layer sequence 10.
  • the impurities 3 have, for example, a middle one
  • An average extent of the impurities 3 in the direction perpendicular to the main side 40 is for example at least 0.25 nm or 1 nm or 3 nm or 5 nm and / or at most 500 nm or 100 nm or 25 nm or 10 nm. The values mentioned apply to both
  • the impurities 3 can be self-organized, for example by the application of a thin layer of material and by subsequent

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Led Devices (AREA)
  • Semiconductor Lasers (AREA)

Abstract

Selon au moins un mode de réalisation l'invention concerne une succession de couches de semi-conducteurs (10) qui comporte un côté n (11) de type n, un côté p (13) de type p et une zone active (2) intermédiaire. La zone active (2) comporte au moins une couche active à émission de rayonnement (21) possédant une première composition de matière destinée à la production d'un premier rayonnement (L1). L'au moins une couche active à émission de rayonnement (21) est orientée perpendiculairement à une direction de croissance (z) de la succession de couches de semi-conducteurs. En outre, la zone active (2) comporte une pluralité de tuyaux actifs à émission de rayonnement (22) possédant une seconde composition de matière ou une structure cristalline différente destinée à produire un second rayonnement (L2), la seconde composition de matière étant différente de la première composition de matière. Les tuyaux actifs à émission de rayonnement (22) sont orientés parallèlement à la direction de croissance (z).
EP14799686.2A 2013-11-13 2014-11-04 Succession de couches de semi-conducteurs et procédé de fabrication de celle-ci Withdrawn EP3069389A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310112490 DE102013112490A1 (de) 2013-11-13 2013-11-13 Halbleiterschichtenfolge und Verfahren zu deren Herstellung
PCT/EP2014/073717 WO2015071134A1 (fr) 2013-11-13 2014-11-04 Succession de couches de semi-conducteurs et procédé de fabrication de celle-ci

Publications (1)

Publication Number Publication Date
EP3069389A1 true EP3069389A1 (fr) 2016-09-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14799686.2A Withdrawn EP3069389A1 (fr) 2013-11-13 2014-11-04 Succession de couches de semi-conducteurs et procédé de fabrication de celle-ci

Country Status (5)

Country Link
US (1) US9653646B2 (fr)
EP (1) EP3069389A1 (fr)
JP (1) JP6284638B2 (fr)
DE (1) DE102013112490A1 (fr)
WO (1) WO2015071134A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102019118543B4 (de) * 2019-07-09 2023-02-16 OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung Anordnung von elektronischen halbleiterbauelementen und verfahren zum betrieb einer anordnung von elektronischen halbleiterbauelementen

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Also Published As

Publication number Publication date
US20160276531A1 (en) 2016-09-22
WO2015071134A1 (fr) 2015-05-21
US9653646B2 (en) 2017-05-16
JP6284638B2 (ja) 2018-02-28
DE102013112490A1 (de) 2015-05-13
JP2017501565A (ja) 2017-01-12

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