WO2021228755A1 - Strahlungsemittierender halbleiterchip und verfahren zur herstellung eines strahlungsemittierenden halbleiterchips - Google Patents
Strahlungsemittierender halbleiterchip und verfahren zur herstellung eines strahlungsemittierenden halbleiterchips Download PDFInfo
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- WO2021228755A1 WO2021228755A1 PCT/EP2021/062303 EP2021062303W WO2021228755A1 WO 2021228755 A1 WO2021228755 A1 WO 2021228755A1 EP 2021062303 W EP2021062303 W EP 2021062303W WO 2021228755 A1 WO2021228755 A1 WO 2021228755A1
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 147
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000002310 reflectometry Methods 0.000 claims abstract description 40
- 230000005670 electromagnetic radiation Effects 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 41
- 239000010410 layer Substances 0.000 description 156
- 230000005855 radiation Effects 0.000 description 26
- 230000003667 anti-reflective effect Effects 0.000 description 6
- 238000005530 etching Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000006117 anti-reflective coating Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
Classifications
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- 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
- H01L33/10—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 light reflecting structure, e.g. semiconductor Bragg reflector
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01S5/0201—Separation of the wafer into individual elements, e.g. by dicing, cleaving, etching or directly during growth
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L33/005—Processes
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- 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
- H01L33/10—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 light reflecting structure, e.g. semiconductor Bragg reflector
- H01L33/105—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 light reflecting structure, e.g. semiconductor Bragg reflector with a resonant cavity structure
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- 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
- H01L33/48—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 body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
- H01S5/0071—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for beam steering, e.g. using a mirror outside the cavity to change the beam direction
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- H—ELECTRICITY
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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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- H01S5/0203—Etching
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- H—ELECTRICITY
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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
- H01S5/028—Coatings ; Treatment of the laser facets, e.g. etching, passivation layers or reflecting layers
- H01S5/0286—Coatings with a reflectivity that is not constant over the facets, e.g. apertures
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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
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/2054—Methods of obtaining the confinement
- H01S5/2081—Methods of obtaining the confinement using special etching techniques
- H01S5/209—Methods of obtaining the confinement using special etching techniques special etch stop layers
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- H—ELECTRICITY
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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
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- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0008—Processes
- H01L2933/0033—Processes relating to semiconductor body packages
- H01L2933/0058—Processes relating to semiconductor body packages relating to optical field-shaping elements
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- 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
- H01L33/0004—Devices characterised by their operation
- H01L33/0045—Devices characterised by their operation the devices being superluminescent diodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
- H01S5/0265—Intensity modulators
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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
- H01S5/028—Coatings ; Treatment of the laser facets, e.g. etching, passivation layers or reflecting layers
- H01S5/0287—Facet reflectivity
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
- H01S5/0625—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in multi-section lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/2054—Methods of obtaining the confinement
- H01S5/2081—Methods of obtaining the confinement using special etching techniques
- H01S5/2086—Methods of obtaining the confinement using special etching techniques lateral etch control, e.g. mask induced
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
- H01S5/4031—Edge-emitting structures
Definitions
- a radiation-emitting semiconductor chip is specified.
- a method for producing a radiation-emitting semiconductor chip is specified.
- One problem to be solved consists in specifying an improved radiation-emitting semiconductor chip.
- a method for producing such a semiconductor chip is to be specified.
- the semiconductor chip comprises a semiconductor body with an active region which is designed to generate electromagnetic radiation.
- the semiconductor body preferably extends in the lateral direction between a first end face of the semiconductor body and a second end face of the semiconductor body.
- the active region is arranged in the resonator.
- the semiconductor chip comprises a resonator which comprises a first end region and a second end region.
- the semiconductor chip comprises at least one recess in the semiconductor body which completely penetrates the active region.
- the recess preferably has side surfaces which run in a vertical direction.
- the recess defines a reflectivity for the electromagnetic radiation.
- the semiconductor chip is, for example, a semiconductor laser diode or a superluminescent light-emitting diode, or SLED for short. If the semiconductor chip is a SLED, the generated radiation is amplified in the resonator to form superluminescent radiation. If the semiconductor chip is a laser diode, the generated radiation is amplified into laser radiation in the resonator.
- a highly reflective mirror layer is arranged on the semiconductor body in the second end region.
- the highly reflective mirror layer preferably has a reflectivity of at least 95%, in particular at least 99%, for radiation generated in the active region.
- the recess is arranged in the first end region.
- the recess is preferably designed to set properties of the radiation emitted by the semiconductor chip.
- the recess for the radiation generated in the active area and / or has Superluminescent radiation preferably has a reflectivity of at most 10%, in particular at most 1%. If the semiconductor chip is a laser diode, the recess for the radiation and / or laser radiation generated in the active area preferably has a reflectivity of at most 90%, in particular at most 10%.
- an anti-reflective layer is preferably arranged on the first end face.
- the anti-reflective layer preferably has a reflectivity of at most 1%, in particular at most 0.01%, for the radiation generated in the active area.
- the recess is arranged between the first end region and the second end region.
- the recess is preferably designed to electrically isolate regions of the semiconductor chip from one another.
- the recess preferably has a reflectivity of at most 1%, in particular of at most 0.01%, for the radiation generated in the active area.
- a partially reflective layer is preferably arranged on the first end face.
- the partially reflective layer preferably has a reflectivity of at most 90%, in particular of at most 10%, for the radiation generated in the active area.
- a first contact layer is arranged on the semiconductor body, which is designed to impress a current in the semiconductor body.
- a second contact layer is arranged on the semiconductor body.
- the semiconductor chip is a segmented semiconductor laser.
- the recess is arranged between the first contact layer and the second contact layer.
- a dielectric layer is arranged in the recess.
- the dielectric layer completely covers at least one side surface of the recess.
- the dielectric layer is preferably in direct contact with the side surface of the recess.
- the dielectric layer is arranged at a distance from each side face of the recess.
- a further dielectric layer is arranged on the dielectric layer.
- the further dielectric layer is preferably in direct contact with the dielectric layer.
- the further dielectric layer is arranged on at least one side surface of the recess.
- the dielectric layer is arranged between the further dielectric layer and the side surface of the recess.
- the further dielectric layer is in direct contact with the side surface of the recess.
- the further dielectric layer is arranged at a distance from each side face of the recess.
- a waveguide structure is arranged in the recess in which the dielectric layer and / or the further dielectric layer is arranged.
- the waveguide structure preferably has the same refractive indices as the semiconductor body.
- a radiation-emitting semiconductor component which comprises at least two of the semiconductor chips described here.
- the semiconductor chips are arranged next to one another in the lateral direction.
- a semiconductor body comprising an active region is provided which is designed to generate electromagnetic radiation.
- a recess is produced in the semiconductor body, which recess completely penetrates the active region.
- a resonator is produced which comprises a first end region and a second end region, the active region being arranged in the resonator.
- the recess specifies a reflectivity for the electromagnetic radiation.
- a width in the lateral direction of the recess is preferably determined.
- the recess is etched and preferably wider than X / 4.
- the recess has, for example, a width of at most 10 ⁇ m, in particular at most 2 ⁇ m.
- a width of the dielectric layer to be applied and / or a width of the further dielectric layer to be applied is determined as a function of the width of the recess, for example by a transfer matrix method. Process fluctuations With regard to a reflectivity at gap edges or recesses, the specified method can advantageously be compensated for subsequently, which results in better yields and thus lower costs.
- a method for producing semiconductor components is specified, with which a semiconductor component described here can be produced. All of the features and embodiments disclosed in connection with the method can therefore also be used in connection with the method for producing the semiconductor chip, the semiconductor chip and / or the semiconductor component, and vice versa.
- a semiconductor wafer comprising active regions, which are each designed to generate electromagnetic radiation, is provided.
- recesses are produced in the semiconductor wafer, which in each case completely penetrate the active regions.
- the recesses are arranged like a matrix, along rows and columns.
- resonators are produced which each comprise a first end region and a second end region, one of the active regions being arranged in each case in one of the resonators.
- the semiconductor wafer is separated into semiconductor components.
- the semiconductor wafer is separated by sawing, laser cutting, stealth dicing or breaking.
- the recesses which each adjoin one of the resonators, specify a first reflectivity for the electromagnetic radiation in the first end region and a second reflectivity for the electromagnetic radiation in the second end region.
- a stack of layers is produced in the recesses.
- the layer stack comprises, for example, a stack of several dielectric layers.
- one or more intermediate layers such as a metal layer or a semiconductor layer, can be arranged between the dielectric layers of the layer stack. Additionally or alternatively, the intermediate layer can also be arranged on an outer dielectric layer of the layer stack.
- the dielectric layers of the layer stack are at least partially different from one another.
- the dielectric layers of the stack of layers comprise, for example, at least partially different materials and / or are at least partially designed with different thicknesses.
- a metallic layer can subsequently be produced on the layer stack in the recesses.
- the metallic layer comprises or consists of at least one metal.
- the metallic layer is, for example, designed to be reflective for the radiation generated. In this case, the metallic layer has reflectivity for the generated radiation of at least 90%, in particular of at least 95% or 98%.
- a mask layer is applied to the layer stack.
- the mask layer each covers a first region of the layer stack in the recesses.
- the layer stack is at least partially removed in each case in a second region in the recesses. Furthermore, the metallic layer is also completely removed in each case in the second region in the recesses.
- the layer stack has an etch stop layer which is arranged between dielectric layers of the layer stack. For example, the layer stack is removed by an etching process down to the etch stop layer.
- the etch stop layer is formed here, for example, with an etch-resistant layer.
- the etch stop layer is a predetermined layer with a predetermined material composition.
- the layer stack in the second region in the recess is at least partially removed as a function of a predetermined material composition of the etch stop layer.
- the etch stop layer is not designed to be etch-resistant. If, for example, the specified material composition of the etch stop layer is detected during etching, the etching process is stopped.
- the first area and the second area each run from a side surface of the recess to a center of the recess.
- the first area and the second area have the same width. Alternatively, the widths of the first area and the second area are different from each other.
- a further layer stack is produced in the recesses on the mask layer and the layer stack.
- the further layer stack can comprise further dielectric layers and / or further intermediate layers.
- the further stack of layers is completely removed in each case in the first area in the recesses.
- the metallic layer is also completely removed in each case in the first region in the recesses.
- the further stack of layers is removed by removing the mask layer. This is, for example, a lift-off process.
- the semiconductor wafer is separated by the recesses.
- the semiconductor wafer is separated by the recesses.
- it is possible to separate between the first area and the second area.
- it can be separated by a cut through the first area or by a cut through the second area.
- the layer stack in each case specifies the first reflectivity in the first regions and the layer stack in each case specifies the second reflectivity in the second regions.
- the stack of layers and the metallic layer each specify the first reflectivity in the first regions, for example, and the stack of layers each specify the second reflectivity in the second regions.
- the layer stack specifies the first reflectivity in each case, for example in the first regions, and the layer stack and the further layer stack each specify the second reflectivity in the second regions.
- the stack of layers is designed, for example, in the first area to be highly reflective for the radiation generated in the active area.
- the first reflectivity has a reflectivity for the radiation generated of at least 90%, in particular of at least 95% or 98%.
- the stack of layers is, for example in the second area, designed to be antireflective for the radiation generated in the active area.
- the second reflectivity has a reflectivity for the radiation generated of at most 80%, at most 50% or at most 20%, in particular of at most 1% or at most 0.01%. If, for example, green light is generated, the reflectivity is at most 80%; if, for example, blue light is generated, the reflectivity is at most 50%.
- the semiconductor components produced in this way can subsequently be separated to form semiconductor chips.
- FIG. 1 shows a plan view of a semiconductor chip 1 in accordance with an exemplary embodiment with a semiconductor body 2 comprising a web 21. Furthermore, a first contact layer 15 and a second contact layer 16 are arranged on the semiconductor body 2. A recess 11, in which a dielectric layer 17 is arranged, is arranged between the contact layers 15 and 16.
- the semiconductor body 2 extends from a first end face 9 to a second end face 10.
- An antireflective layer 13 is arranged on the first end face 9 and a highly reflective mirror layer 12 is arranged on the second end face 10.
- a resonator 6 extends between a first end region 7 and a second end region 8.
- the semiconductor body 2 is supplied with constant current through the first contact layer 15, while radiation generated by an active region 3 is modulated through the second contact layer 16.
- FIG. 2 shows a plan view of a semiconductor chip 1 in accordance with a further exemplary embodiment, in which the resonator 6 extends between a first end face 9 and a second end face 10.
- the semiconductor chip 1 can be switched on and off by operating the second contact layer 16. In this way, higher switching speeds can advantageously be achieved.
- FIG. 3 shows a plan view of a semiconductor component 22 in accordance with an exemplary embodiment with four semiconductor chips 1 according to FIG. 2. At least two of the recesses 11 can have different reflectivities. Differences that arise as a result of different thermal coupling of the semiconductor chips 1 can thus be compensated for.
- the recesses 11 of the semiconductor chips 1 lying on the inside can have a higher reflectivity than the recesses 11 of the semiconductor chips 1 lying on the outside, since these are more poorly cooled and thus have a higher laser threshold.
- FIG. 4 shows a plan view of a semiconductor component 22 in accordance with an exemplary embodiment with four semiconductor chips 1 which, in contrast to FIG. 1, only have a first contact layer 16.
- FIGS. 5 and 6 each show a plan view of a semiconductor component 22 according to an exemplary embodiment, the resonators 6 of the semiconductor chips 1 each having different lengths.
- FIGS. 7, 8 and 9 and FIGS. 10 and 11 show process stages for producing a semiconductor component 22.
- First recesses 11 are produced at the wafer level (FIG. 7).
- a dielectric layer 17 is introduced into each of the recesses 11.
- the semiconductor chips 1 are then separated at the wafer level to form semiconductor components 22.
- FIGS. 12, 13, 14, 15, 16, 17, 18, 19 and 20 each show a sectional view of a recess 11 in which a dielectric layer 17 is arranged.
- FIGS. 21, 22, 23, 24, 25, 26 and 27 each show a sectional view of a recess 11 in which a dielectric layer 17 and a further dielectric layer 18 are arranged.
- FIGS. 28 and 29 each show a sectional view of two recesses 11 in a semiconductor chip 1, in which a dielectric layer 17 is arranged.
- FIG. 30 shows a sectional view of a recess 11 in which a waveguide structure 19 is arranged.
- FIGS. 31, 32 and 33 show exemplary diagrams of a reflectivity R for radiation at a recess 11 with a dielectric layer 17, for example S1O2, as shown in FIGS.
- the width dl is the width of a dielectric layer 17 which is arranged on a side surface of the recess 20.
- FIGS. 34, 35, 36 and 37 each show exemplary diagrams of a reflectivity R for radiation at a recess 11 with a dielectric layer 17 as a function of a wavelength l of the radiation.
- n HL is approximately 2.47 in each case.
- FIG. 34, 35, 36 and 37 each show exemplary diagrams of a reflectivity R for radiation at a recess 11 with a dielectric layer 17 as a function of a wavelength l of the radiation.
- n HL is approximately 2.47 in each case.
- the recess has a width
- FIG. 38 shows an exemplary diagram in which a quotient of n M and n HL as a function of reflectivity R is shown.
- n M / n HL 1 - 0.08397 * sqrt (R) applies. This relation applies to a completely filled recess 11 according to FIGS. 19 and 20.
- FIGS. 39 and 40 show process stages for producing a semiconductor component 22.
- First recesses 11 are first produced in a semiconductor wafer 28 at the wafer level.
- a stack of layers 23 is introduced into each of the recesses 11 in accordance with the process stages in FIGS. 41, 42, 43 and 44.
- the semiconductor wafer 28 is then separated at the wafer level to form semiconductor components 22.
- the semiconductor wafer 28 is turned into semiconductor components 22 at the wafer level by sawing, laser cutting,
- a stack of layers 23 is produced in recess 11.
- the layer stack 23 comprises six dielectric layers which are stacked one on top of the other.
- the dielectric layers are in lateral Directions stacked one on top of the other and on a bottom surface of the recess, the dielectric layers are stacked one on top of the other in the vertical direction.
- the dielectric layers of the layer stack 23 are deposited one after the other by means of an atomic layer deposition process (ALD) or a chemical one, for example
- ALD atomic layer deposition process
- chemical one for example
- the dielectric layers of the layer stack 23 can also be applied by a sputtering process or a vapor deposition process.
- the dielectric layers can be applied, for example, from a combination of these processes.
- the fourth dielectric layer of the six dielectric layers is designed as an etch stop layer 24.
- the etch stop layer 24 comprises tantalum oxide.
- a mask layer 25 is applied to the layer stack 23, which mask layer covers a first region 26 of the layer stack 23 in the recess 11. A second region 27 directly adjoining it is free of the mask layer 25.
- the mask layer 25 is, for example, a photoresist or an etch-resistant protective layer.
- the dielectric layers of the layer stack 23 in the second region 27 up to the etch stop layer 24 are removed by means of an etching process.
- the mask layer 25 is subsequently removed.
- the dielectric layers of the layer stack 23 are not removed by using the mask layer 25.
- the dielectric layers in the first region 26 are, for example, designed to be highly reflective for radiation generated in the active region.
- the dielectric layers in the second region 27 are, for example, designed to be antireflective for radiation generated in the active region.
- the semiconductor chips 1 are separated into semiconductor components 22.
- the isolation takes place by separating the semiconductor chips 1 in the recess 11, where the first area 26 and the second area 27 adjoin one another.
- a plurality of semiconductor components 22 are advantageously produced in this way, each having the dielectric layers, which are designed to be highly reflective, at a first end region 7 and the dielectric layers, which are designed to be antireflective, at a second end region 8.
- a resonator can advantageously be generated particularly easily and precisely.
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DE112021002697.6T DE112021002697A5 (de) | 2020-05-12 | 2021-05-10 | Strahlungsemittierender halbleiterchip und verfahren zur herstellung eines strahlungsemittierenden halbleiterchips |
US17/924,288 US20230197893A1 (en) | 2020-05-12 | 2021-05-10 | Radiation-emitting semiconductor chip and method for producing a radiation-emitting semiconductor chip |
JP2022568773A JP7480350B2 (ja) | 2020-05-12 | 2021-05-10 | ビーム放射半導体チップおよびビーム放射半導体チップの製造方法 |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2302747A1 (de) * | 2008-06-06 | 2011-03-30 | General Nano Optics Limited | Diodenlaser, integraler diodenlaser und integraler optischer halbleiterverstärker |
US20190221999A1 (en) * | 2018-01-18 | 2019-07-18 | Sharp Kabushiki Kaisha | Semiconductor laser device, manufacturing method thereof, and light emitting device |
DE102018111319A1 (de) * | 2018-05-11 | 2019-11-14 | Osram Opto Semiconductors Gmbh | Optoelektronisches Halbleiterbauelement und Verfahren zur Herstellung eines optoelektronischen Halbleiterbauelements |
US20190356108A1 (en) * | 2018-05-18 | 2019-11-21 | Horiba, Ltd. | Method of manufacturing semiconductor laser element, and semiconductor laser device thereof and gas analyzer |
WO2020144226A1 (de) * | 2019-01-10 | 2020-07-16 | Osram Opto Semiconductors Gmbh | Strahlungsemittierender halbleiterchip und verfahren zur herstellung eines strahlungsemittierenden halbleiterchips |
-
2021
- 2021-05-10 WO PCT/EP2021/062303 patent/WO2021228755A1/de active Application Filing
- 2021-05-10 DE DE112021002697.6T patent/DE112021002697A5/de active Pending
- 2021-05-10 JP JP2022568773A patent/JP7480350B2/ja active Active
- 2021-05-10 US US17/924,288 patent/US20230197893A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2302747A1 (de) * | 2008-06-06 | 2011-03-30 | General Nano Optics Limited | Diodenlaser, integraler diodenlaser und integraler optischer halbleiterverstärker |
US20190221999A1 (en) * | 2018-01-18 | 2019-07-18 | Sharp Kabushiki Kaisha | Semiconductor laser device, manufacturing method thereof, and light emitting device |
DE102018111319A1 (de) * | 2018-05-11 | 2019-11-14 | Osram Opto Semiconductors Gmbh | Optoelektronisches Halbleiterbauelement und Verfahren zur Herstellung eines optoelektronischen Halbleiterbauelements |
US20190356108A1 (en) * | 2018-05-18 | 2019-11-21 | Horiba, Ltd. | Method of manufacturing semiconductor laser element, and semiconductor laser device thereof and gas analyzer |
WO2020144226A1 (de) * | 2019-01-10 | 2020-07-16 | Osram Opto Semiconductors Gmbh | Strahlungsemittierender halbleiterchip und verfahren zur herstellung eines strahlungsemittierenden halbleiterchips |
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JP7480350B2 (ja) | 2024-05-09 |
US20230197893A1 (en) | 2023-06-22 |
JP2023525125A (ja) | 2023-06-14 |
DE112021002697A5 (de) | 2023-02-16 |
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