WO2020187570A1 - Strahlungsemittierender halbleiterchip und strahlungsemittierendes halbleiterbauelement - Google Patents
Strahlungsemittierender halbleiterchip und strahlungsemittierendes halbleiterbauelement Download PDFInfo
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- WO2020187570A1 WO2020187570A1 PCT/EP2020/055693 EP2020055693W WO2020187570A1 WO 2020187570 A1 WO2020187570 A1 WO 2020187570A1 EP 2020055693 W EP2020055693 W EP 2020055693W WO 2020187570 A1 WO2020187570 A1 WO 2020187570A1
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- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/10—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00
- H10H29/14—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00 comprising multiple light-emitting semiconductor components
- H10H29/142—Two-dimensional arrangements, e.g. asymmetric LED layout
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- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
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- H01S5/0239—Combinations of electrical or optical elements
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- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/18—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities
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- H10H20/042—Superluminescent diodes
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- H01S2301/00—Functional characteristics
- H01S2301/18—Semiconductor lasers with special structural design for influencing the near- or far-field
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
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- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/0206—Substrates, e.g. growth, shape, material, removal or bonding
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- H01S5/00—Semiconductor lasers
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- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/028—Coatings ; Treatment of the laser facets, e.g. etching, passivation layers or reflecting layers
- H01S5/0287—Facet reflectivity
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- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/1082—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region with a special facet structure, e.g. structured, non planar, oblique
- H01S5/1085—Oblique facets
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- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/42—Arrays of surface emitting lasers
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- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/819—Bodies characterised by their shape, e.g. curved or truncated substrates
- H10H20/821—Bodies characterised by their shape, e.g. curved or truncated substrates of the light-emitting regions, e.g. non-planar junctions
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- H10H20/80—Constructional details
- H10H20/84—Coatings, e.g. passivation layers or antireflective coatings
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- H—ELECTRICITY
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- 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
- H10H20/84—Coatings, e.g. passivation layers or antireflective coatings
- H10H20/841—Reflective coatings, e.g. dielectric Bragg reflectors
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- H—ELECTRICITY
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- 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
Definitions
- a radiation-emitting semiconductor chip is specified. It also emits radiation
- radiation-emitting semiconductor component can be specified with such a semiconductor chip.
- the semiconductor layer sequence is preferably grown epitaxially.
- the radiation-emitting semiconductor chip is preferably designed to be near-ultraviolet when in operation
- the visible light can be, for example, light of blue, green, yellow or red color.
- the semiconductor layer sequence is preferably based on a compound semiconductor material. If the radiation-emitting semiconductor chip is designed to emit light of red color, for example, the semiconductor layer sequence is preferably based on an I I I-V compound semiconductor material.
- the I I I-V compound semiconductor material is, for example, a phosphide and / or arsenide compound semiconductor material.
- the III-V compound semiconductor material then comprises, for example, AlGalnP and / or AlGaAs.
- the semiconductor layer sequence is preferably based on an I I I-N compound semiconductor material.
- the III-N compound semiconductor material is, for example, a nitride compound semiconductor material.
- the III-N compound semiconductor material then comprises, for example, InGaN and AlGaN.
- the semiconductor layer sequence can contain dopants as well
- Crystal lattice of the semiconductor layer sequence i.e. Al, Ga,
- the semiconductor layer sequence preferably extends along the main plane of extent.
- a lateral direction is preferably oriented parallel to the main extension plane.
- a vertical direction is preferably oriented perpendicular to the lateral direction.
- the active regions are preferably arranged at a distance from one another in the lateral direction. In this case, the active areas are preferably not at any point in the
- the active areas can, for example, in a
- At least two of the active areas can be in direct contact with one another.
- at least two active areas are preferably designed to overlap in plan view.
- the overlapping active areas can be in the lateral direction
- each active area has a main direction of extent.
- Main direction of extent extends in each case along a length of an active area.
- the length of an active region preferably corresponds to a greatest dimension of a cross-sectional area of the active region parallel to the
- the active areas each have a width that is perpendicular to
- Main direction of extent runs.
- the width of an active area corresponds to a smallest dimension of the Cross-sectional area of an active area in a direction parallel to the main extension plane.
- the active areas are preferably straight. That is to say, side surfaces of the active regions preferably extend parallel to the main direction of extent. Alternatively, the active areas can be curved. In this case, the side surfaces of the active regions are preferably curved in relation to the main direction of extent.
- each active area is preferably between at least 0.2 micrometers and at most 50 micrometers, particularly preferably between at least 3
- each active region is preferably between at least 50 micrometers and at most 1000 micrometers, particularly preferably between at least 80 micrometers and at most 100 micrometers.
- each active area emits electromagnetic radiation during operation from an emitter area running parallel to the main extension plane.
- the emitter regions are preferably each arranged along a main direction of extent in a first edge region of an active region.
- the emitter regions are preferably separated from one another by non-emitting regions.
- the non-emitting regions are preferably between directly in plan view
- emitting areas send compared to the
- Emitter areas comparatively little or no radiation out.
- the non-emitting areas preferably emit 99% less radiation than the emitter areas.
- the radiation-emitting semiconductor chip preferably comprises a carrier.
- the semiconductor layer sequence is preferably arranged on the carrier with a bottom surface lying opposite the emitter regions.
- the carrier is preferred for this
- the carrier is preferably designed to be electrically conductive.
- the carrier thus preferably comprises a metal or is formed from a metal.
- the carrier is electrodeposited.
- heat that occurs in the active areas can be dissipated particularly effectively in this way.
- the carrier is a
- the semiconductor material is silicon and the dielectric material is A1N.
- Emitter regions arranged at grid points of a regular grid, which are connected by at least one grid line.
- the regular grid can preferably be a polygonal grid.
- the grid lines preferably extend parallel to the main plane of extent.
- the regular grid is preferably a two-dimensional grid.
- the regular grid can be a one-dimensional grid.
- the grid points of the regular grid are in this case arranged along a line.
- the grid points are
- the line can be a straight line or a
- the grid can be a square grid. In this case, the regular grid points first
- Grid lines and second grid lines the first grid lines running parallel to one another and the second grid lines running parallel to one another. Furthermore, the first grid lines are preferably arranged orthogonally to the second grid lines.
- Main direction of extent of at least one active area an angle of at least 10 ° and at most 80 ° with the grid lines of the regular grid. That is to say, the main directions of extent of the active regions preferably do not run parallel to the at least one grid line of the regular grid.
- a vertex of the angle is in each one
- the legs of the angle are formed by part of the main direction of extent and part of the grid line that adjoins the emitter area
- the parts of the main direction of extent and of the grid line that form the angle generally extend in the lateral direction in a direction facing away from the emitter region. According to a preferred embodiment, the
- each active area emits electromagnetic radiation during operation from an emitter area running parallel to the main extension plane.
- the emitter regions are arranged at grid points of a regular grid, which are connected by at least one grid line.
- Main direction of extent of at least one active area an angle of at least 10 ° and at most 80 ° with the grid lines of the regular grid.
- Emitter areas arranged along columns and rows. If the regular grid is, for example, a two-dimensional orthogonal grid, the lines preferably extend along first grid lines. The gaps preferably extend along second
- Main directions of extent of the active areas each form a first angle of at least 45 ° and at most 80 ° with the first grid lines.
- the main directions of extent of the active areas each close a second angle of at least 10 ° and at most 45 ° with the second
- Grid lines a The first angle and the second angle together preferably add up to approximately 90 °. “Approximately” in this context means in particular that the first angle and the second angle together result in at least 75 ° and at most 105 °.
- the active areas of a line can be designed to be completely overlapping. Furthermore, active areas can be directly
- a density of the emitter areas per unit area can advantageously be particularly high.
- the active areas of a column can be designed to be completely overlapping.
- the active areas of directly adjacent columns can preferably not overlap in a side view along the columns.
- the semiconductor chip can advantageously do so
- the main directions of extent of the active areas of each row can preferably enclose the same angles with the grid lines of the regular grid.
- the main directions of extent of the active areas in each column also form the same angle with the grid lines of the
- Grid lines of the regular grid Furthermore, the main directions of extent of the active regions in at least one column can enclose different angles with the grid lines of the regular grid.
- the main directions of extent of the active regions can thus be arranged in a circle, for example in plan view. Furthermore, such circular arrangements can overlap in plan view.
- At least two active areas overlap in plan view.
- the one in plan view overlapping portion of the overlapping active areas forms a common active area of the at least two active overlapping areas.
- At least two active areas of a common row preferably overlap in plan view
- At least two active areas of a common column can overlap one another in plan view.
- at least two active areas in a common row can overlap with one another in plan view and the overlapping active areas can each with at least one active area of a directly adjacent line in plan view
- the overlapping area can for example be spaced from the emitter areas of the at least two active areas in the lateral direction.
- the overlapping area is arranged in a center of the active areas.
- a density of the emitter regions per unit area can thus advantageously
- a first reflective surface is arranged in a first edge region of each active region, which surface encloses an angle of at least 35 ° and at most 55 ° with the main extension plane.
- the first reflective surface preferably encloses an angle of at least 40 ° and at most 50 ° with the main extension plane in the first edge region. Is particularly preferred the angle between the first reflecting surface and the main extension plane is approximately 45 °.
- the first reflective surface preferably has a reflectivity of for the electromagnetic radiation
- the first reflective surface is preferably designed to be electrically insulating and comprises, for example
- the first reflective surface is, for example, a Bragg mirror made up of alternately arranged layers of a high
- the first reflective surface can be a combination of metallic materials and electrically insulating materials. An interface between the first reflective surface and the
- the semiconductor layer sequence is preferably embodied in an electrically insulating manner here.
- the first edge regions of at least two directly adjacent ones overlap
- Emitter areas in a row in plan view It is possible that the first reflective surfaces of at least two directly adjacent emitter regions in the overlapping portion of the two active regions are directly adjacent to one another
- the first edge regions of at least second directly adjacent emitter regions preferably completely overlap one another in the overlapping region.
- a light output efficiency and an emission characteristic of the radiation-emitting one are advantageous Semiconductor chips improved because the emitted radiation of the active areas is coupled out via the overlapping emitter areas and can be superimposed in a far field.
- the first reflective surfaces in the overlapping first edge regions can preferably have an angle to a main extension plane that differs from 45 °, but is between at least 35 ° and at most 55 °. The angles are preferred
- each active region which is the first
- a second reflective surface is arranged.
- the second reflective surface is preferably designed to be electrically insulating and comprises, for example, dielectric materials or consists of them.
- the second reflective surface is, for example, a Bragg mirror made up of alternately arranged layers of a high
- the second reflective surface can be a combination of metallic materials and electrically insulating materials.
- the semiconductor layer sequence is preferably embodied in an electrically insulating manner here.
- the second reflective surface preferably has a reflectivity for the electromagnetic radiation of
- the second reflective surface forms an angle of at least 35 ° and at most 55 ° with the main extension plane.
- the second reflective surface preferably closes in the second
- Edge area forms an angle of at least 40 ° and at most 50 ° with the main extension plane.
- the angle between the second reflective surface and the main extension plane is particularly preferably 45 °.
- the second reflective surfaces are each perpendicular to
- the second reflective surfaces preferably each have a deviation of at most 2 ° from the vertical direction.
- each active area has an anti-reflective coating that is applied to the
- Semiconductor layer sequence is arranged in the first edge region.
- the anti-reflective coating is preferred on the
- the antireflective coating preferably overlaps with the emitter area.
- the anti-reflective coating particularly preferably completely overlaps the emitter area.
- each active area has a reflective coating that is applied to the
- Semiconductor layer sequence is arranged in the second edge region.
- the reflective coating is preferred on the
- Electromagnetic radiation generated in areas preferably has a reflectivity of at least 90%, at least 95% or at least 99%. This can be the case with the
- the top surface is the
- Reflective coating Particularly preferably, the
- each active area is free of a reflective coating and / or each active area
- the area is free from an anti-reflective coating.
- each active region comprises a first contact layer which is arranged on the top surface of the semiconductor layer sequence.
- Contact layers are preferably electrically conductive
- the first contact layers are preferably arranged in regions on the top surface of the semiconductor layer sequence.
- the first contact layers are preferably lateral
- the first contact layers each have a width and a length.
- a first contact layer is arranged on the top surface of the semiconductor layer sequence.
- the first contact layer is preferably contiguous
- the first contact layer preferably does not cover the first edge regions and / or the second edge regions.
- the first contact layer covers the
- the semiconductor layer sequence preferably at least 80% or at least 90%.
- the first contact layer preferably comprises or consists of a metal. Furthermore, first
- Contact layers comprise several individual layers.
- the first contact layer can furthermore have a transparent conductive oxide or be formed therefrom.
- Transparent conductive oxides (“transparent conductive oxide”, TCO) are transparent, electrically conductive materials, usually metal oxides, such as zinc oxide, tin oxide, aluminum tin oxide, cadmium oxide, titanium oxide, indium oxide and indium tin oxide (ITO).
- metal oxides such as zinc oxide, tin oxide, aluminum tin oxide, cadmium oxide, titanium oxide, indium oxide and indium tin oxide (ITO).
- each active region comprises a second contact layer which is arranged on a bottom area of the semiconductor layer sequence.
- the second contact layers are preferably electrically conductive formed and set up and provided for making electrical contact with the semiconductor layer sequence.
- the second contact layers are preferably arranged in regions on the bottom surface of the semiconductor layer sequence.
- the second contact layers are preferably spaced apart from one another in the lateral direction on the bottom surface of the
- the second contact layers each have a width and a length.
- the second contact layers preferably comprise or consist of a metal. Furthermore, the second
- Contact layers comprise several individual layers. Furthermore, the first contact layers can be transparent
- the metal of the first contact layers and / or the metal of the second contact layers is, for example, Ti, Pt, Ag and / or Au.
- Contact layers and the second contact layers have lateral dimensions of an active zone of each active area.
- Each active area preferably has a first one
- a current density of the current to be introduced is comparatively high in the overlapping areas. In the overlapping areas, the current density is preferably so great that the active area emits electromagnetic radiation and thus the active ones Includes zones.
- the active zone preferably has a larger area than a first contact layer or a second
- the first contact layers of the overlapping active regions also overlap one another in plan view. Furthermore, the second contact layers can also overlap with one another there in plan view.
- the active areas and the active zones can preferably be controlled individually and separately from one another. If at least two active areas overlap with one another, the overlapping active areas are preferably together
- first contact layers and / or the second contact layers of the overlapping active areas do not overlap one another in plan view. In this case they are
- overlapping active areas are preferably controllable separately from one another.
- the semiconductor layer sequence can each include a ridge waveguide in the active regions.
- Each ridge waveguide is preferably formed by a projection that is part of the
- Main extension direction of the active areas is aligned, preferably specifies the width of the active area.
- flanks of the ridge waveguides can each have one
- Passivation layer must be covered, which has a refractive index have, which is different from a refractive index of the semiconductor layer sequence.
- the emitter regions do not overlap to a large extent with the active zones in a plan view in the lateral direction.
- the emitter regions each overlap with an active zone in a plan view in the lateral direction by a maximum of 10%.
- the emitter regions preferably do not in each case overlap with the active zone.
- the emitter regions preferably each directly adjoin the active zones in a plan view in the lateral direction.
- the radiation-emitting semiconductor chip has a large number of active areas that are not parallel to each other
- Extending grid lines of a regular grid on which the emitter regions are arranged Such a semiconductor chip therefore advantageously has a particularly high density of emitter regions per unit area.
- the dimensions of the active zones are each predetermined by the dimensions of the first contact layers and the second contact layers. Complex etching of the semiconductor layer sequence can thus be dispensed with. These are advantageously non-radiative
- the radiation-emitting semiconductor chip is a superluminescent light-emitting diode with an increased brightness and / or an increased
- Luminous flux compared to a conventional light-emitting diode.
- Superluminescent light-emitting diode can be amplified in the active area.
- electromagnetic radiation that propagates in the direction of the second reflective surface can be deflected in the direction of the first reflective surface reflective surface can spread
- the coupled electromagnetic radiation is thus amplified and has an increased
- Brightness and / or luminous flux Brightness and / or luminous flux.
- super-luminescent light-emitting diodes In contrast to a laser diode, super-luminescent light-emitting diodes generally do not have a resonator.
- electromagnetic radiation is advantageously amplified, the radiation having a comparatively low temporal coherence and a comparatively high spatial coherence. This shows the superluminescent
- light emitting diode has a wider emission spectrum compared to a laser diode.
- light granulations (“speckle noise”) can be reduced due to the comparatively broad emission spectrum.
- the electromagnetic radiation preferably propagates in the active zone and in the active area along the
- the radiation-emitting semiconductor chip described here can preferably form a display or be used as a radiation source in a display. Furthermore, the radiation-emitting semiconductor chip described here is preferably suitable for "near-to-eye applications”.
- the radiation-emitting semiconductor chip described here can be used for applications in which a high, for example monochromatic, luminance is required on a given area.
- the radiation-emitting semiconductor chip can be used as
- Light source can be used in a projector or beamer.
- the active areas are usually not individually controllable.
- the radiation-emitting semiconductor chip is a laser diode.
- the radiation-emitting semiconductor chip is designed for this purpose
- the laser radiation is preferably emitted via the emitter area.
- Laser radiation preferably has a comparatively high temporal coherence and a comparatively high spatial coherence.
- the laser radiation is coherent radiation.
- the radiation emitted by the active area is preferably monochromatic and coherent laser light.
- the radiation thus advantageously has a comparatively small bandwidth with a comparatively high luminous flux at the same time.
- Semiconductor chips are the active areas as an array
- the active areas are arranged as an array means here, for example, that the active areas are attached to the grid points of the one-dimensional grid or to the grid points of the two-dimensional grid.
- this includes
- radiation-emitting semiconductor component a first radiation-emitting semiconductor chip, which is formed by a radiation-emitting semiconductor chip described here.
- this includes
- the first is
- the electromagnetic radiation is preferably light of blue, green or red color.
- the first wavelength range is
- the second is
- the wavelength range is preferably between 400 nanometers and 490 nanometers inclusive, between 490 nanometers and 600 nanometers inclusive, or between 600 nanometers and 700 nanometers inclusive.
- the electromagnetic radiation of the first wavelength range is preferably different from the electromagnetic radiation of the second wavelength range.
- the second is
- radiation-emitting semiconductor chip a radiation-emitting semiconductor chip described here.
- Semiconductor chips can each be arranged in a common plane.
- the radiation-emitting semiconductor component prefferably has a third radiation-emitting component
- the third radiation-emitting semiconductor chip is preferably designed to emit electromagnetic radiation of a third wavelength range.
- the wavelength range is preferably between 400 nanometers and 490 nanometers inclusive, between 490 nanometers and 600 nanometers inclusive, or between 600 nanometers and 700 nanometers inclusive.
- the electromagnetic radiation of the first wavelength range is preferably different from the electromagnetic radiation of the second wavelength range and the third wavelength range.
- Semiconductor chips and the third radiation-emitting Semiconductor chips can each be arranged in a common plane.
- the first radiation-emitting element For example, the first radiation-emitting
- Semiconductor chip be designed to emit electromagnetic radiation of red color, the second
- the radiation-emitting semiconductor chip can be designed to emit electromagnetic radiation of green color and the third radiation-emitting semiconductor chip can be designed to emit electromagnetic radiation of blue color.
- Radiation-emitting semiconductor chips can preferably be arranged next to one another.
- the radiation-emitting semiconductor component can have a multiplicity of first radiation-emitting semiconductor chips, a multiplicity of second radiation-emitting semiconductor chips and a multiplicity of third radiation-emitting semiconductor chips
- the first, second and third semiconductor chips can be arranged alternately next to one another.
- the second are radiation-emitting
- the emitter areas of the second radiation-emitting semiconductor chip are the Emitter areas of the first radiation-emitting
- this includes
- the radiation-emitting semiconductor component a plurality of second radiation-emitting semiconductor chips.
- the second radiation-emitting semiconductor chips are preferably light-emitting diode chips, or LED chips for short.
- the second radiation-emitting semiconductor chips are arranged on the first radiation-emitting semiconductor chip.
- the second radiation-emitting semiconductor chips are preferably on a top surface of the first radiation-emitting one
- the second radiation-emitting semiconductor chips can particularly preferably also be arranged on the emitter regions, among other things.
- the first radiation-emitting semiconductor chip is designed to emit light of red color and the second radiation-emitting semiconductor chips are designed to do so
- the light from the first semiconductor chip can preferably pass through the second radiation-emitting semiconductor chips
- the radiation-emitting semiconductor chip and the radiation-emitting semiconductor component are explained in more detail below with reference to the figures on the basis of exemplary embodiments.
- FIG. 1 shows a schematic illustration in plan view of a radiation-emitting semiconductor chip according to one embodiment
- FIG. 2 shows a schematic illustration in plan view of a radiation-emitting semiconductor chip according to one embodiment
- Figure 3 is a schematic sectional view of a
- Figure 4 is a schematic sectional view of a
- FIG. 5 exemplary measurements of the far field of
- FIG. 6 shows an example of an infrared microscope image in a top view of an emitter region of an IR radiation-emitting semiconductor chip.
- FIG. 1 shows the exemplary embodiment of one described here
- Semiconductor layer sequence 2 with a multiplicity of active regions 3 and a main extension plane 1 comprises.
- the active regions 3 are arranged at a distance from one another in the lateral direction and are not at any point in FIG.
- Each active area 3 has a main direction of extent 5, each of which extends along a length of an active area 3.
- the width in the lateral direction of the active regions 3 is, for example, 5 in this exemplary embodiment
- the length of the active regions 3 in the lateral direction is 100 micrometers here, for example.
- each active area 3 emits electromagnetic radiation from an emitter area 6 running parallel to the main extension plane 4.
- the emitter regions 6 are each arranged along a main extension direction 5 in a first edge region 12 of an active region 3.
- a second edge region 14 is arranged in each case opposite the first edge regions 12.
- the first edge regions 12 are marked with a white circle in FIG. 1, while the second edge regions 14 are marked with a black circle in FIG.
- the emitter regions 6 are one at grid points 7
- the regular grid is an orthogonal, two-dimensional grid.
- the regular grid here has first grid lines 8a and second grid lines 8b.
- the first grid lines 8a are orthogonal to the second grid lines 8b.
- the main extension directions 5 of the active regions 3 each have a first angle 11a of approximately 65 ° with the first grid lines 8a. According to this
- the main directions of extent 5 of the active regions 3 each enclose a second angle 11b of approximately 25 ° with the second grid lines 8b.
- the first angle 8a and the second angle 8b thus result in approximately 90 °.
- the emitter regions 6 are thus arranged along columns 9 and rows 10.
- the lines 10 here extend along the first grid lines 8a.
- the columns 9 extend along the second grid lines 8b.
- the main directions of extension 5 of the active regions 3 of each row 10 enclose the same first angles 11a with the first grid lines 8a of the regular grid.
- the main directions of extension 5 of the active regions 3 in each column 9 thus also enclose the same second angles 11b with the second grid lines 8b of the regular grid. That is to say that all main directions of extension 5 of the active regions 3 are arranged parallel to one another.
- the active areas 3 of directly adjacent rows 10 partially overlap in a side view along the rows 10. Furthermore, the active areas 3 of a column 9 are in a side view along the columns 9 formed completely overlapping. The active areas 3 of directly adjacent columns 9 overlap in one
- the second edge regions 14 are arranged at further grid points of a further regular grid.
- the further regular grid is shifted by a translation vector with respect to the regular grid. That is, without a translation vector, the regular grid and the further regular grid are congruent.
- two first regions 12 of two directly adjacent emitter regions 6 in each case overlap in a row 10 in plan view.
- the two directly adjacent emitter regions 6 completely overlap one another and form a common emitter region.
- the common emitter regions are arranged at grid points 7 of a regular grid, which are connected by at least one grid line 8.
- the regular grid is an orthogonal grid, analogous to the exemplary embodiment according to FIG. 1.
- the second edge regions 14 are arranged at further grid points of a further regular grid which cannot be aligned congruently to the regular grid.
- a radiation-emitting component which has a first
- the second radiation-emitting semiconductor chips are, for example, on the first radiation-emitting semiconductor chip
- the first radiation-emitting semiconductor chip is arranged downstream of the second radiation-emitting semiconductor chip in this case.
- radiation-emitting semiconductor chip 1 which has a semiconductor layer sequence 2 which comprises the active region 3.
- a first reflective surface 13 is arranged in a first edge region 12, an angle between the first reflective surface 13 and the main extension plane being approximately 45 °. Furthermore, on the top surface of the semiconductor layer sequence 2 in the first edge region 12 there is a
- Antireflective coating 16 arranged. In a second edge area 14 is a second
- Main extension plane is approximately 45 °. Furthermore, a reflective coating 17 is arranged on the top surface of the semiconductor layer sequence 2 in the second edge region 14.
- Reflective coating 17 is on the top surface of the
- a first contact layer 18 is arranged.
- the lateral dimension of an active zone 20 of the active region 3 is predetermined by the first contact layer 18 and the second contact layer 19.
- electromagnetic radiation in each case forms a beam with a beam profile which has a lateral and a vertical extent in cross section perpendicular to a main direction of extent 5 of the active region 3.
- Electromagnetic radiation that propagates in the direction of the second reflective surface 15 is deflected by means of the reflective coating 17 and repeated reflection on the second reflective surface 15 in the direction of the first reflective surface 13. Issued
- electromagnetic radiation which propagates in the direction of the first reflective surface 13 is superimposed on that reflected on the second reflective surface 15 Radiation.
- the so superimposed electromagnetic radiation of the active zone 20 is in the area of
- Anti-reflective coating 16 superimposed and decoupled.
- the coupled-out radiation is thus amplified and has an increased brightness and an increased luminous flux.
- the active area 3 according to FIG. 4 does not have a reflective coating 17.
- a second reflective surface 15 is arranged perpendicular to the main extension plane 4. In this way, electromagnetic radiation propagating in the direction of the second reflective surface 15 is deflected directly on the second reflective surface 15 in the direction of the first reflective surface 13.
- the beam profile of the coupled-out electromagnetic radiation has, for example, an opening angle which is predetermined by a material system used for the semiconductor chip 1. When using an AlGaN material system, the opening angle is usually around 34 °.
- no anti-reflective coating 16 is arranged on the top surface of the semiconductor layer sequence 2.
- Embodiments of Figures 1, 2, 3 and 4 is each designed as a superluminescent light-emitting diode.
- the radiation preferably has a fast axis and a slow axis in a far field. In the far field, the radiation spreads as a plane wave in space.
- the direction of oscillation of the radiation in which the plane wave has the greater speed of propagation is called the "fast axis", the direction of oscillation that is perpendicular to the fast axis and a smaller one
- the normalized radiated power L norm is measured along a fast axis and has a half width
- FIG. 6 shows a radiation-emitting semiconductor chip in plan view in the area of a single emitter region.
- the slow axis can be specified by means of the width B of the first contact.
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Led Devices (AREA)
- Led Device Packages (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17/434,511 US11948966B2 (en) | 2019-03-18 | 2020-03-04 | Radiation emitting semiconductor chip and radiation emitting semiconductor device |
| CN202080022609.2A CN113646892B (zh) | 2019-03-18 | 2020-03-04 | 发射辐射的半导体芯片和发射辐射的半导体器件 |
| DE112020001384.7T DE112020001384B4 (de) | 2019-03-18 | 2020-03-04 | Strahlungsemittierende Halbleiterchips und strahlungsemittierendes Halbleiterbauelement |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019106805.3 | 2019-03-18 | ||
| DE102019106805.3A DE102019106805A1 (de) | 2019-03-18 | 2019-03-18 | Strahlungsemittierender halbleiterchip und strahlungsemittierendes halbleiterbauelement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020187570A1 true WO2020187570A1 (de) | 2020-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2020/055693 Ceased WO2020187570A1 (de) | 2019-03-18 | 2020-03-04 | Strahlungsemittierender halbleiterchip und strahlungsemittierendes halbleiterbauelement |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US11948966B2 (de) |
| CN (1) | CN113646892B (de) |
| DE (2) | DE102019106805A1 (de) |
| WO (1) | WO2020187570A1 (de) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080198890A1 (en) * | 2007-02-21 | 2008-08-21 | Ungar Jeffrey E | Vertically emitting laser and method of making the same |
| DE102008061152A1 (de) * | 2008-12-09 | 2010-06-10 | Osram Opto Semiconductors Gmbh | Optoelektronischer Halbleiterchip |
| WO2010102263A1 (en) * | 2009-03-05 | 2010-09-10 | Pressco Technology, Inc. | Digital heat injection by way of surface emitting semi-conductor devices |
| US20160233390A1 (en) * | 2015-02-05 | 2016-08-11 | Nichia Corporation | Light emitting device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4942366A (en) * | 1989-03-21 | 1990-07-17 | General Electric Company | Amplifier device with coupled surface emitting grating |
| JPH09281420A (ja) | 1996-04-10 | 1997-10-31 | Minolta Co Ltd | レーザビーム走査光学装置 |
| US20050180482A1 (en) * | 2004-01-23 | 2005-08-18 | Osowski Mark L. | Very low cost surface emitting laser diode arrays |
| DE102006002275A1 (de) * | 2005-01-19 | 2006-07-20 | Osram Opto Semiconductors Gmbh | Beleuchtungseinrichtung |
| DE102008058436B4 (de) * | 2008-11-21 | 2019-03-07 | Osram Opto Semiconductors Gmbh | Kantenemittierender Halbleiterlaserchip |
| WO2010060929A1 (en) | 2008-11-26 | 2010-06-03 | Micronic Laser Systems Ab | Image reading and writing using a complex two-dimensional interlace scheme |
| DE102008064073A1 (de) | 2008-12-19 | 2010-06-24 | Osram Gesellschaft mit beschränkter Haftung | Verfahren zur Herstellung einer Mehrzahl von LED-Beleuchtungsvorrichtungen und LED-Beleuchtungsvorrichtung |
| DE102014112562A1 (de) | 2014-09-01 | 2016-03-03 | Osram Opto Semiconductors Gmbh | Optoelektronisches Halbleiterbauelement |
| AU2016298390B2 (en) | 2015-07-30 | 2021-09-02 | Optipulse Inc. | Rigid high power and high speed lasing grid structures |
| DE102017117135A1 (de) | 2017-07-28 | 2019-01-31 | Osram Opto Semiconductors Gmbh | Verfahren zur Herstellung einer Mehrzahl von Laserdioden und Laserdiode |
| KR102243541B1 (ko) * | 2020-10-12 | 2021-04-21 | 동우 화인켐 주식회사 | 안테나 소자, 이를 포함하는 터치 센서-안테나 모듈 및 이를 포함하는 디스플레이 장치 |
-
2019
- 2019-03-18 DE DE102019106805.3A patent/DE102019106805A1/de not_active Withdrawn
-
2020
- 2020-03-04 WO PCT/EP2020/055693 patent/WO2020187570A1/de not_active Ceased
- 2020-03-04 DE DE112020001384.7T patent/DE112020001384B4/de active Active
- 2020-03-04 CN CN202080022609.2A patent/CN113646892B/zh active Active
- 2020-03-04 US US17/434,511 patent/US11948966B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080198890A1 (en) * | 2007-02-21 | 2008-08-21 | Ungar Jeffrey E | Vertically emitting laser and method of making the same |
| DE102008061152A1 (de) * | 2008-12-09 | 2010-06-10 | Osram Opto Semiconductors Gmbh | Optoelektronischer Halbleiterchip |
| WO2010102263A1 (en) * | 2009-03-05 | 2010-09-10 | Pressco Technology, Inc. | Digital heat injection by way of surface emitting semi-conductor devices |
| US20160233390A1 (en) * | 2015-02-05 | 2016-08-11 | Nichia Corporation | Light emitting device |
Also Published As
| Publication number | Publication date |
|---|---|
| US11948966B2 (en) | 2024-04-02 |
| CN113646892A (zh) | 2021-11-12 |
| DE112020001384A5 (de) | 2021-12-02 |
| US20220130893A1 (en) | 2022-04-28 |
| CN113646892B (zh) | 2024-12-24 |
| DE102019106805A1 (de) | 2020-09-24 |
| DE112020001384B4 (de) | 2025-03-27 |
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