WO2022223284A1 - Verfahren zur herstellung eines bauteils mit kavität und bauteil mit kavität - Google Patents
Verfahren zur herstellung eines bauteils mit kavität und bauteil mit kavität Download PDFInfo
- Publication number
- WO2022223284A1 WO2022223284A1 PCT/EP2022/058954 EP2022058954W WO2022223284A1 WO 2022223284 A1 WO2022223284 A1 WO 2022223284A1 EP 2022058954 W EP2022058954 W EP 2022058954W WO 2022223284 A1 WO2022223284 A1 WO 2022223284A1
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- WIPO (PCT)
- Prior art keywords
- layer
- semiconductor chip
- intermediate layer
- component
- carrier
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000004065 semiconductor Substances 0.000 claims abstract description 177
- 239000000463 material Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 239000004020 conductor Substances 0.000 claims description 7
- 239000012777 electrically insulating material Substances 0.000 claims description 4
- 238000009429 electrical wiring Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 384
- 238000009413 insulation Methods 0.000 description 9
- 230000005855 radiation Effects 0.000 description 6
- 238000005538 encapsulation Methods 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000012876 topography Methods 0.000 description 4
- 230000005693 optoelectronics Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 229910001149 41xx steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000012780 transparent material Substances 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
- H01L33/48—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
- H01L33/483—Containers
- H01L33/486—Containers adapted for surface mounting
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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
- H01L25/16—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
- H01L25/167—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits comprising optoelectronic devices, e.g. LED, photodiodes
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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
- H01L33/005—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
- H01L33/48—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
- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
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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
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L2933/0066—Processes relating to semiconductor body packages relating to arrangements for conducting electric current to or from 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
- H01L33/36—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 electrodes
- H01L33/38—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 electrodes with a particular shape
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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
Definitions
- a component with at least one cavity is specified.
- a method for producing a component in particular the component with at least one cavity or with a plurality of cavities, is specified.
- a suitable reflective environment that is suitable for beam shaping should be generated around every emission point, for example around every picture element (pixel).
- a suitable reflective environment that is suitable for beam shaping should be generated around every emission point, for example around every picture element (pixel).
- a component generally has cavities in which individual light-emitting semiconductor chips, such as light-emitting semiconductor diodes or micro-LEDs, are arranged. If the cavities have vertical depths that are smaller or slightly larger than the usual vertical heights of the semiconductor chips, the cavities could be produced before the semiconductor chips are attached. Side walls of the cavities can be provided with thin, radiation-reflecting metal layers. Such metal layers can at the same time be set up for electrical contacting of the semiconductor chips arranged in the cavities. However, this harbors a latent risk of possible short circuits during the electrical wiring of the semiconductor chips and during the operation of the component.
- One object is to specify a component, in particular an optoelectronic component in the form of a display, with a high level of compactness, improved beam-shaping properties and increased stability with respect to electrical short circuits.
- a further object is to specify a reliable and cost-efficient method for producing a component, in particular a component described here.
- this has a carrier, at least one semiconductor chip and a cover layer.
- the cover layer is arranged on the carrier, for example, and has a cavity in which the semiconductor chip is arranged.
- the semiconductor chip is set up to generate electromagnetic radiation in the infrared, visible or ultraviolet spectral range.
- the semiconductor chip can be a micro-LED.
- the cover layer has a vertical height that differs depending on the lateral positions of the cover layer, for example.
- the top layer may have a reduced vertical height at positions of the intermediate layer.
- a component is often described below only in connection with at least one semiconductor chip and at least one cavity in the cover layer. However, it is possible for such a component to have a single semiconductor chip and a single cavity in the cover layer or a plurality of cavities in the cover layer and a plurality of semiconductor chips.
- the features of the component described below in connection with a semiconductor chip and a cavity can be used analogously for a component with a plurality of semiconductor chips and a plurality of cavities in the cover layer.
- the component can be an optoelectronic component, in particular a display.
- Each cavity with the semiconductor chip(s) arranged therein can form a picture element, ie a pixel, of the component.
- the component has an intermediate layer.
- the intermediate layer is designed to be electrically insulating, for example.
- the intermediate layer can be arranged in regions between the carrier and the top layer. It is possible for the intermediate layer and/or the top layer to be/is arranged in regions directly on the carrier.
- the intermediate layer can extend into the cavity or into the cavities along the lateral direction. For example, the intermediate layer borders, in particular directly, on the semiconductor chip arranged in the cavity.
- the intermediate layer can be free from being covered by the cover layer within the cavity(ies). Outside the cavity / s, the intermediate layer of the top layer covered, in particular completely covered. If the cover layer has a plurality of cavities, the intermediate layer can have a plurality of partial layers, in particular a plurality of laterally spaced partial layers, the partial layers each extending into or through one of the cavities.
- a lateral direction is understood to mean a direction which runs, in particular, parallel to a main extension surface of the carrier.
- a vertical direction is understood to mean a direction which is in particular directed perpendicularly to the main extension surface of the carrier. The vertical direction and the lateral direction are orthogonal to each other.
- this has a carrier, at least one semiconductor chip, an intermediate layer and a cover layer.
- the semiconductor chip, the intermediate layer and the cover layer are arranged on the carrier.
- the cover layer has at least one cavity in which the semiconductor chip is arranged.
- the intermediate layer is arranged in regions along the vertical direction between the carrier and the cover layer. The intermediate layer extends into the cavity along a lateral direction, the intermediate layer adjoining the semiconductor chip, in particular directly adjoining the semiconductor chip arranged in the cavity.
- the intermediate layer which is designed in particular to be electrically insulating, a risk of short circuits between electrical supply lines or connections to the semiconductor chip can be largely avoided or ruled out.
- the chip transfer can and does take place on flat surfaces therefore no complex stepped stamps that would negatively affect placement accuracy.
- a permanent connection of the semiconductor chips to the intended mounting areas is reproducible and can be designed to be significantly more reliable. Wiring starting from a front side of the semiconductor chip should only overcome a minimum of topography. Furthermore, significantly deeper cavities could be produced. This allows more options for beam shaping and, in particular, allows stronger forward emission.
- inner walls or side flanks of the cavity can be provided with a reflective material in a simple manner, with the reflective material being able to be selected independently of a material for electrical contact layers.
- this degree of freedom makes it possible to dispense with possible cover layers, which would otherwise be recommended, for example, for a more reliable generation of chip interconnects or for the necessary insulation. Without such cover layers, significantly higher degrees of reflection can be achieved for the side flanks of the cavity.
- the intermediate layer completely encloses the semiconductor chip in lateral directions.
- the intermediate layer can partially or completely cover side faces of the semiconductor chip.
- a front side or a rear side of the semiconductor chip is not covered by the intermediate layer, in particular except for cavities under the semiconductor chip starting from its side flanks. These cavities can be partially or completely filled by the intermediate layer.
- the intermediate layer has a lateral width that is greater than a lateral width of the semiconductor chip.
- the intermediate layer can completely or only partially enclose the semiconductor chip in lateral directions.
- the intermediate layer completely covers at least one side surface of the semiconductor chip along its entire width. Further side areas of the semiconductor chip can be covered by the intermediate layer only in certain areas or not at all.
- the intermediate layer has a lateral width that is smaller than a lateral width of the semiconductor chip.
- the intermediate layer only partially covers a side surface of the semiconductor chip.
- the intermediate layer only partially covers the side area of the semiconductor chip along the entire width of the side area.
- the semiconductor chip has a front side facing away from the carrier, which is flush with the intermediate layer in the vertical direction or protrudes vertically beyond the intermediate layer. Deviating from this, it is also possible for a front side of the intermediate layer to protrude slightly beyond the front side of the semiconductor chip along the vertical direction.
- the latter has a reflection layer which is formed on the inner walls of the cavity.
- the reflection layer can be formed from an electrically insulating material.
- the reflection layer is electrically isolated from the semiconductor chip.
- the component has a first contact layer and a second contact layer for making electrical contact with the semiconductor chip.
- the intermediate layer is arranged in regions along the vertical direction between the first contact layer and the second contact layer, the intermediate layer electrically insulating the first contact layer from the second contact layer.
- the first contact layer or the second contact layer can be formed from a radiation-transmissive electrically conductive material.
- the semiconductor chip is located between the first contact layer and the second contact layer.
- the semiconductor chip has, in particular, a first electrical contact point on its rear side and a second electrical contact point on its front side.
- the first contact layer is electrically isolated from the second contact layer by the intermediate layer.
- the semiconductor chip partially covers the first contact layer in a plan view.
- the first contact layer has at least one subregion or subregions, the subregion or subregions protruding laterally out of the semiconductor chip in a plan view.
- the protruding part area or the protruding part areas of the first contact layer can be at least partially or completely covered by the intermediate layer in plan view.
- the semiconductor chip is arranged in the vertical direction between the first contact layer and the second contact layer.
- the second contact layer can be arranged on a front side of the semiconductor chip which is remote from the carrier.
- the second contact layer at least partially or completely covers the front side of the semiconductor chip.
- the second contact layer is formed, for example, from a radiation-transmissive material, in particular from a transparent and electrically conductive material.
- the carrier has a base body, in particular an electrically insulating base body, vias, inner connection layers and outer connection layers.
- the inner connection layers and the outer connection layers are arranged on opposite surfaces of the base body.
- the vias extend through the body. The vias can each electrically connect one of the inner connection layers to one of the outer connection layers.
- the semiconductor chip has a vertical height.
- the cavity has a vertical depth.
- a ratio of the vertical depth of the cavity to the vertical height of the semiconductor chip can be between 2 and 20 inclusive, for example between 2 and 15 inclusive, between 2 and 10 inclusive, between 2 and 5 inclusive, between 3 and 10 inclusive or between 5 inclusive and 10 In accordance with at least one embodiment of the component, this has a plurality of semiconductor chips.
- the cover layer can have a plurality of cavities, at least one or exactly one of the semiconductor chips being arranged in each of the cavities, the inner walls of which are provided in particular with a reflection layer.
- a method for producing a component, in particular a component described here, is specified, in which the cavity or the plurality of cavities is formed only after the setting or arrangement or after the electrical wiring of the semiconductor chip or semiconductor chips.
- the semiconductor chips can be arranged or wired without significant differences in the topography on the carrier, which is designed as a display backplane, for example .
- the intermediate layer for topography compensation can be formed on the carrier.
- the intermediate layer and the semiconductor chips differ in their vertical heights by at most 30%, 25%, 20%, 10%, 5% or at most 3%. It is possible for the intermediate layer to terminate flush with the associated semiconductor chip on a vertical plane. An at least regionally planar contacting of the semiconductor chip can thus be achieved due to the small or hardly existing differences in the topography.
- the intermediate layer can be designed to be electrically insulating. In this case, the intermediate layer electrically insulate different contact layers, which are arranged for example above and below the intermediate layer, from one another.
- the intermediate layer can also be designed to be transparent to radiation.
- the intermediate layer is designed with regard to its material composition and layer thickness such that it has a transmittance of at least 50%, 60%, 70%, 80% or at least 90% for radiation in the visible or ultraviolet spectral range, for example.
- An intermediate layer designed in this way has hardly any negative impact on the efficiency of the component.
- the method described here is particularly suitable for the production of a component described here.
- the features described in connection with the component can therefore also be used for the method and vice versa.
- the semiconductor chip is arranged on the carrier.
- the intermediate layer is applied to the carrier, the intermediate layer laterally adjoining the semiconductor chip.
- the cover layer is applied to the intermediate layer and to the carrier, with at least one cavity being formed in the cover layer, in which cavity the semiconductor chip is arranged.
- the intermediate layer is arranged in regions along the vertical direction between the support and the cover layer. The intermediate layer extends into the cavity along the lateral direction. Be particular the arrangement of the semiconductor chip, the application of the intermediate layer and the application of the cover layer are carried out in the order given.
- the semiconductor chip is electrically wired before the cover layer is applied to the intermediate layer and to the carrier.
- the semiconductor chip can thus be positioned and wired in a simple manner. Since the cavity is only formed after the semiconductor chip has been positioned, the cavity with any desired vertical depth can be formed in a simple manner.
- a planar contact layer is formed on a front side of the intermediate layer remote from the carrier for the purpose of electrically wiring the semiconductor chip.
- Figures 1A, 1B, IC, ID, IE and 1F are schematic representations of various method steps of an exemplary embodiment of a method for producing a component, which is shown schematically in particular in Figure 1F in a sectional view and in Figure 1G in a plan view,
- FIGS. 2A and 2B are schematic representations of a further exemplary embodiment of a component in a sectional view and in a plan view
- 3A shows a schematic representation of a method step according to a further exemplary embodiment of a method for producing a component, which is shown schematically in particular in FIG. 3B in a sectional view and in FIG. 3C in a plan view
- FIGS. 2A and 2B are schematic representations of a further exemplary embodiment of a component in a sectional view and in a plan view
- 3A shows a schematic representation of a method step according to a further exemplary embodiment of a method for producing a component, which is shown schematically in particular in FIG. 3B in a sectional view and in FIG. 3C in a plan view
- FIGS. 2A and 2B are schematic representations of a further exemplary embodiment of a component in a sectional view and in a plan view
- 3A shows a schematic representation of a method step according to a further exemplary embodiment of
- FIGS. 4A, 4B and 5 are schematic representations of further exemplary embodiments of a component in a sectional view or in a plan view.
- FIGS. 1A to 1F show various method steps of a method for producing a component 10.
- a carrier 1 is provided, on which at least one semiconductor chip 2 or a plurality of semiconductor chips 2 is positioned or mounted.
- the carrier 1 can be a carrier plate or part of the carrier plate of a display.
- the carrier 1 or the carrier plate can have a plurality of transistors, for example a plurality of thin-film transistors (TFT), which are not shown in FIG. 1A for reasons of clarity.
- the transistors are set up for driving, in particular for individually driving the semiconductor chips 2 .
- the carrier 1 can be a so-called TFT backplane. It is also possible that the transistors are integrated in a separate control board. According to FIG.
- the carrier 1 has a base body IG, which stabilizes the carrier 1 mechanically. At least 50%, 60%, 80% or 90% of the total volume or the total weight of the carrier 1 can be allotted to the base body IG.
- the base body IG is formed from an electrically insulating material.
- the carrier 1 has a front side IV, which can be formed in some areas by the surface of the base body IG.
- the carrier 1 has at least a first inner connection layer 61 and a second inner connection layer 62 on a front side of the base body IG, which are spatially spaced apart from one another in the lateral direction and, in particular, are associated with different electrical polarities of the component 1 .
- the carrier 1 can have a plurality of such pairs composed of the first inner connection layer 61 and the second inner connection layer 62, the pairs being assigned to a semiconductor chip 2, for example.
- Each pair of the first inner connection layer 61 and the second inner connection layer 62 can be set up for electrically contacting a semiconductor chip 2 , in particular precisely one semiconductor chip 2 .
- the component 1 can have a common inner electrode instead of the first inner connection layers 61 or instead of the second inner connection layers 62 .
- the device 1 has a common electrode and a plurality of second inner terminal layers 62 or a plurality of first inner terminal layers 61 .
- the second inner connection layers 62 or the first inner connection layers 61 can be arranged in openings of the common, in particular contiguous, electrode.
- the carrier 1 has at least a first outer connection layer 81 and a second outer connection layer 82 on a rear side of the base body IG, which are spatially spaced apart from one another in the lateral direction and, in particular, are spatially spaced apart from one another and electrically insulated by an electrically insulating separating layer 80.
- a rear side 10R of the component 10 or a rear side IR of the carrier 1 can be formed in some areas by surfaces of the outer connection layers 81 and 82 and in some areas by surfaces of the separating layer 80 .
- the carrier 1 can have several such pairs of the first outer connection layer 81 and the second outer connection layer 82 . It is possible for the carrier 1 to have a common outer electrode instead of the first outer connection layers 81 or instead of the second outer connection layers 82 .
- the second outer connection layers 82 or the first outer connection layers 81 can be arranged in openings of the common outer, in particular contiguous, electrode.
- external electrical contact can be made with the semiconductor chip 2 via the rear side IR or 10R, for example exclusively via the rear side IR or 10R, on the outer connection layers 81 and 82 .
- the component 1 can be part of a larger assembly, so that in particular the rear side IR or 10R is not exposed.
- the composite has a carrier plate on which the component 1 is arranged.
- the carrier plate can have transistors which are set up for electrical control, in particular for individual electrical control of the semiconductor chips 2 .
- the carrier 1 has at least a first through contact 71 and a second through contact 72 .
- the vias 71 and 72 extend along the vertical direction, in particular through the base body IG.
- the first/second outer connection layer 81/82 is electrically conductively connected to the first/second inner connection layer 61/62 via the first/second via 71/72.
- the carrier 1 can have a plurality of such pairs of the first through contact 71 and the second through contact 72 .
- first connection layers 61 and 81 and the first via 71 are assigned to a first electrode, for example an anode of the component 10 .
- the second connection layers 62 and 82 and the second via 72 can be associated with a second electrode, for example a cathode of the component 10 or of the semiconductor chip 2 .
- a transistor can be connected to the anode or to the cathode.
- the semiconductor chip 2 is electrically conductively connected to the first inner connection layer 61 via a first contact layer 51 .
- the first contact layer 51 is located along the vertical direction between the semiconductor chip 2 and the first inner connection layer 61.
- the first contact layer 51 or the first inner connection layer 61 can be laterally connected via a side surface 2S or protrude beyond a plurality of side surfaces 2S of the semiconductor chip 2.
- This lateral edge region is shown schematically in FIG. 1A as a lateral subregion 51L of the first contact layer 51 or as a lateral subregion 61L of the first inner connection layer 61.
- the lateral partial area 51L or 61L is not covered by the semiconductor chip 2.
- the semiconductor chip 2 has a front side 2V.
- the front side 2V is one
- the semiconductor chip 2 can be designed as a volume emitter.
- the side surfaces 2S can also be designed as radiation exit surfaces.
- a part or the entire rear side of the semiconductor chip 2 can also be embodied as a radiation exit area.
- the first contact layer 51 is formed of a transparent electrically conductive material such as indium tin oxide (ITO).
- the underlying first inner connection layer 61 can be embodied as an electrically conductive mirror layer.
- the first inner terminal layer 61 comprises CrMo/MoAl. Deviating from this, it is possible for the first contact layer 51 to be formed from an electrically conductive and radiation-reflecting material.
- an intermediate layer 3 is applied to the carrier 1, in particular after the semiconductor chip 2 has been arranged.
- the intermediate layer 3 adjoins the semiconductor chip 2 , in particular directly adjoins the semiconductor chip 2 .
- the intermediate layer 3 can enclose the semiconductor chip 2 partially or completely.
- a side face 2S of a plurality of side faces 2S of the semiconductor chip 2 can be partially or completely covered by a material of the intermediate layer 3 .
- the material of the intermediate layer 3 is a radiation-transmissive material.
- the semiconductor chip 2 has a vertical height 2H.
- the intermediate layer 3 has a vertical height 3H. It is possible that the vertical height 2H will change by at most 30%, 20%, 15%, 10%, 5% or at most 3% from the vertical height 3H.
- the semiconductor chip 2 can protrude slightly beyond the intermediate layer 3 along the vertical direction, or vice versa. However, it is possible that within the manufacturing tolerances the front side 2V of the semiconductor chip 2 is flush with a front side 3V of the intermediate layer 3 that faces away from the carrier 1 .
- the manufacturing tolerances can be in the micron range, about ⁇ 1 pm or less, for example ⁇ 800 nm, ⁇ 500 nm, ⁇ 300 nm or ⁇ 100 nm.
- the intermediate layer 3 can first be applied areally to the carrier 1, in particular to the base body IG, to the second inner connection layer 62 and to the semiconductor chip 2.
- partial areas of the carrier 1, for example partial areas of the base body IG and the second inner connection layer 62, and the front side 2V of the semiconductor chip 2 can be uncovered from the material of the intermediate layer 3.
- intermediate layer 3 is structured using a mask. As shown schematically in FIG. 1B, the intermediate layer 3 has at least one opening 30 in which the second inner connection layer 62 is freely accessible in some areas.
- the intermediate layer 3 can adjoin each of the semiconductor chips 2 , in particular directly adjoin each of the semiconductor chips 2 .
- the intermediate layer 3 can be designed to be continuous.
- a second contact layer 52 is formed on the intermediate layer 3.
- the second contact layer 52 extends from the opening 30 of the intermediate layer 3 via the front side 3V of the intermediate layer 3 to the front side 2V of the semiconductor chip 2.
- the second contact layer 52 is made of an electrically conductive transparent material, for example an electrically conductive transparent oxide (TCO).
- the second contact layer 52 can partially or completely cover the front side 2V of the semiconductor chip 2 .
- the second contact layer 52 can be designed as a planar contact. Within the opening 30, the second contact layer 52 extends along the vertical direction from a bottom surface of the opening 30 via side walls of the opening 30 to the front side 3V of the intermediate layer 3. An intermediate connection layer 50 can be formed within the opening 30 to achieve improved electrical contact , which is arranged between the second contact layer 52 and the second inner connection layer 62.
- the semiconductor chip 2 is electrically conductively connected to the outer connection layers 81 and 82 via the first contact layer 51 and the second contact layer 52 .
- the intermediate layer 3 is located along the vertical direction in some areas between the first contact layer 51 and the second contact layer 52.
- the intermediate layer 3 thus serves in particular as an insulating layer between the first contact layer 51 and the second contact layer 52.
- Lateral subregions 51L or 61L of the first contact layer 51 or the first inner connection layer 61, which protrude laterally from the semiconductor chip 2 in a plan view of the front side IV of the carrier 1, can be partially or completely covered by the intermediate layer 3. This significantly reduces the risk of short circuits.
- the cover layer 4 is formed according to FIG.
- the cover layer 4 can be formed from a lacquer material, in particular from a lacquer with photoactive components.
- a material of the cover layer 4 is applied to exposed surfaces of the intermediate layer 3, the second contact layer 52, the carrier 1, in particular the base body IG, and/or the semiconductor chip 2.
- the opening 30 of the intermediate layer 3 can be completely filled with the material of the cover layer 4 .
- the cover layer 4 can directly or indirectly adjoin the intermediate layer 3, the second contact layer 52, the carrier 1, the base body IG of the carrier 1 and/or the semiconductor chip 2. It is possible that the covering layer 4 initially completely covers the intermediate layer 3, the second contact layer 52, the semiconductor chip 2 and/or the carrier 1 in a plan view of the carrier 1 .
- a cavity 40 is formed in the cover layer 4.
- the cavity 40 can be formed at the position of the semiconductor chip 2 by structuring the cover layer 4, for example by removing the material of the cover layer 4.
- FIG. It is possible for the cover layer 4 to be structured downstream using its photoactive component(s). It is possible that partial areas of the second contact layer 52, the intermediate layer 3, the semiconductor chip 2 and/or the carrier 1 in the cavity 40 are exposed become/are.
- FIG. 1E in particular, only a section of the component 10 with a cavity 40 in the cover layer 4 is shown schematically. Deviating from this, it is possible for the component 10 to have a plurality of such sections, in particular contiguous sections, with a plurality of corresponding cavities 40 .
- the cover layer 4 has a vertical height 4H.
- the vertical height 4H can be different. If the cover layer 4 is directly adjacent to the carrier 1 at a first position, for example, the cover layer 4 can have a maximum vertical height 4H, which defines a vertical depth 40T of the cavity 40, in particular the maximum vertical depth 40T of the cavity 40. If the cover layer 4 is directly adjacent to the second contact layer 52 or to the intermediate layer 3 at a second position, for example, the cover layer 4 has a reduced vertical height 4H compared to the first position.
- the maximum vertical depth 40T of the cavity 40 which is given by the maximum vertical height 4H of the cover layer 4, is in particular greater than or equal to the sum of the vertical height 3H of the intermediate layer 3, the layer thickness of the second contact layer 52 and the reduced vertical height 4H .
- a ratio of the vertical depth 40T of the cavity 40 to the vertical height 2H of the semiconductor chip 2 can be between 2 and 20 inclusive, for example between 2 and 15 inclusive, between 2 and 10 inclusive, between 2 and 5 inclusive, between 3 and 10 inclusive or between 5 and 10 inclusive.
- the inner walls of the cavity 40 are provided with a reflection layer 4R.
- the inner walls of the cavity 40 are/are completely covered with a material of the reflection layer 4R.
- the inner walls of the cavity 40 are slanted.
- the reflection layer 4R can be formed from an electrically insulating material or from an electrically conductive material.
- the reflection layer 4R is designed to be electrically conductive, it is possible for the reflection layer 4R to be in electrical contact with the second contact layer 52 . However, it is preferred that the reflection layer 4R is electrically insulated from the second contact layer 52 . For example, as shown schematically in Figures 2A and 2B, there is an insulating layer 60 between the reflective layer 4R and the second contact layer 52.
- Encapsulation layer 9 are partially or completely filled.
- the encapsulation layer 9 is in particular designed to be radiation-transmissive. It is possible for the encapsulation layer 9 to have scattering particles, reflection particles and/or phosphors for converting the radiation emitted by the semiconductor chip 2 . It is also possible for at least one small converter plate to be arranged in the cavity 40 or on the cavity 40 .
- FIG. 1G shows the component 10 shown in particular in FIG. 1F in a plan view.
- the intermediate layer 3 is in the form of a tie bar on which the second contact layer 52 is formed.
- the intermediate layer 3 has a lateral width 3B which, in particular, is greater than a lateral width 52B of the second contact layer 52.
- the intermediate layer 3 extends into the cavity 40 along the lateral direction. In a plan view, the intermediate layer 3 is thus located both inside and outside the cavity 40.
- the semiconductor chip 2 arranged in the cavity 40 is completely surrounded by the intermediate layer 3 in the lateral direction.
- the lateral partial regions 51L and 61L of the first contact layer 51 and of the first inner connection layer 61 which protrude laterally from the semiconductor chip 2 in a top view, can be partially or completely covered by the cover layer 3.
- the first contact layer 51 is arranged between the semiconductor chip 2 and the first inner connection layer 61 along the vertical direction.
- the first inner connection layer 61 has a larger cross section than the first contact layer 51 and protrudes laterally beyond the first contact layer 51 .
- the first contact layer 51 can have a larger cross section than the semiconductor chip 2 and protrudes laterally beyond the semiconductor chip 2 .
- the semiconductor chip 2 is arranged between the first contact layer 51 and the second contact layer 52 along the vertical direction. Since the electrically insulating intermediate layer 3 is arranged between the first contact layer 51 and the second contact layer 52 and partially or in particular completely covers the lateral partial regions 51L and 61L of the first contact layer 51 and the first inner connection layer 61, the risk of short circuits can be minimized.
- the second contact layer 52 which in particular consists of a transparent and electrically conductive material is formed, completely cover the semiconductor chip 2 in plan view.
- the semiconductor chip 2 has a lateral width 2B that is smaller than the lateral width 52B of the second contact layer 52.
- the intermediate layer 3 outside the opening 40 has a smaller lateral width than the cover layer 4.
- the second contact layer 52 can be formed exclusively on the intermediate layer 3. Outside the opening 40 the intermediate layer 3 or the second contact layer 52 can be completely covered by the cover layer 4 .
- the second contact layer 52 can be formed in regions on the cover layer 3, the first contact layer 51, the first inner connection layer 61 and in regions on the semiconductor chip 2 in a plan view.
- the cover layer 4 is not present. In other words, the intermediate layer 3 within the opening 40 is free from being covered by the cover layer 4.
- FIGS. 1A to 1F are particularly suitable for the production of a component 10 in accordance with all of the exemplary embodiments described here.
- the features described in connection with the method steps can therefore also be used for the component 10 described here and vice versa.
- the exemplary embodiment of a component 10 illustrated in FIG. 2A essentially corresponds to the component 10 illustrated in FIG. 1F.
- the insulating layer 60 is exclusive arranged within the cavity 40.
- the insulation layer 60 is used as a separating layer between the reflection layer 4R and the second contact layer 52, the first contact layer 51 and/or the first inner connection layer 61.
- the insulation layer 60 is directly adjacent to the reflection layer 4R, the first inner connection layer 61, the second contact layer 52 and/or the first contact layer 51.
- the insulation layer 60 can be designed to be continuous or have at least two partial layers that are separate from one another.
- the semiconductor chip 2 is only partially surrounded by the intermediate layer 3.
- the intermediate layer 3 can completely cover at least one side face 2S of the semiconductor chip 2 .
- the intermediate layer 3 partially covers further side areas 2S of the semiconductor chip 2 . This is shown schematically in FIG. 2B, for example.
- FIG. 2B shows a component 10 which is illustrated in particular in FIG. 2A in a sectional view.
- the semiconductor chip 2, the first inner connection layer 61 and/or the first contact layer 51 can be completely surrounded by the insulation layer 60.
- the exemplary embodiment of a component 10 illustrated in FIG. 2B essentially corresponds to the component 10 illustrated in FIG 2 only partially. It is also conceivable that the one shown in FIG. 2B Insulation layer 60 is not present. As a further alternative, it is possible for the insulation layer 60 to be embodied in such a way that it covers, in particular completely covers, the lateral subregions 51L and 61L of the first contact layer 51 or the first inner connection layer 61, for example if these lateral subregions 51L and 61L do not or are only partially covered by the intermediate layer 3. Such a configuration of the insulating layer 60 can be used for all exemplary embodiments of a component 10, in particular if the semiconductor chip 2 is not completely surrounded by the intermediate layer 3.
- the reflection layer 4R can be designed to be electrically conductive or electrically insulating.
- the method step shown in Figure 3A essentially corresponds to the method step shown in Figure 1B of a method for producing a component 10.
- Figure 3A explicitly shows that the front side 2V of the semiconductor chip 2 is connected to the front side 3V of the intermediate layer 3 flush.
- the intermediate layer 3 extends through the cavity 40 .
- the second contact layer 52 can be designed exclusively as a planar contact.
- the component 10 shown in FIGS. 3B and 3C essentially corresponds to the component 10 shown in FIGS. 1F and 1G.
- the intermediate layer 3 can extend through the cavity 40 or through a plurality of cavities 40 . If the component 10 has a plurality of cavities 40 and a plurality of semiconductor chips 2 arranged in the cavities 40, the intermediate layer 3 can be designed to be continuous overall. If the intermediate layer 3 extends into the respective cavities 40 but not through the respective cavities 40, the intermediate layer 3 can have a plurality of laterally spaced partial layers, the partial layers of the intermediate layer 3 each extending into one of the cavities 40.
- the second contact layer 52 only extends into the cavity 40 and not through the cavity 40.
- the second contact layer 52 can be designed to be continuous.
- the semiconductor chips 2 arranged in the cavities 40 have a common electrode.
- the number of the second inner connection layers 62, the second vias 72 and/or the second outer connection layers 82 can be reduced.
- the semiconductor chips 2 are controlled individually, in particular via the plurality of the first outer connection layers 81 and the first vias 71.
- FIGS. 4A and 4B essentially corresponds to the exemplary embodiment of a component illustrated in FIGS. 1F and 1G Component 10.
- the semiconductor chip 2 is only partially enclosed by the intermediate layer 3.
- the intermediate layer 3 borders on three different side areas 2S of the semiconductor chip 2 .
- a side face 2S of the semiconductor chip 2 can be completely covered by the material of the intermediate layer 3 .
- Two further side areas 2S of the semiconductor chip 2 can be partially covered by the material of the intermediate layer 3 .
- the second contact layer 52 is designed such that its lateral width 52B is smaller than the lateral width 2B of the semiconductor chip 2.
- the intermediate layer 3 can be completely surrounded by the cover layer 4 in lateral directions. If the intermediate layer 3 has a plurality of laterally spaced partial layers, each of which extends into one of the cavities 40, each of the partial layers of the intermediate layer 3 can be completely surrounded by the cover layer 4 in lateral directions.
- the lateral width 3B of the intermediate layer 3 is still larger than the lateral width 2B of the semiconductor chip 2 or the lateral width 52B of the second contact layer 52.
- the lateral width 3B of the intermediate layer 3 it is possible for the lateral width 3B of the intermediate layer 3 to be smaller than the lateral width 2B of the semiconductor chip 2. This is shown schematically in FIG. 5, for example.
- the component 10 shown in FIG. 5 thus essentially corresponds to the component 10 shown in FIG. 4B, with the difference that the intermediate layer 3 is only attached to one of the Side faces 2S of the semiconductor chip 2 is adjacent.
- the intermediate layer 3 thus only partially covers the lateral partial regions 51L and 61L of the first contact layer 51 and the first inner connection layer 61 .
- the lateral partial regions 51L and 61L of the first contact layer 51 or the first inner connection layer 61 which are not or only partially covered by the intermediate layer 3 in a top view, can be covered by the insulation layer 60 and/or by the encapsulation layer 9, in particular completely covered.
- a possible electrical short circuit between the second contact layer 52 or the reflection layer 4R and the first contact layer 51 or the first inner connection layer 61 can thus continue to be reliably prevented.
- the intermediate layer 3 which is formed in particular before the formation of the cavity/s 40, many advantages can be achieved with regard to beam shaping, reduction of the risk of short circuits and with regard to the production of a component 10 described here.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Led Device Packages (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN202280030000.9A CN117178379A (zh) | 2021-04-21 | 2022-04-05 | 用于制造具有腔室的器件的方法和具有腔室的器件 |
DE112022000750.8T DE112022000750A5 (de) | 2021-04-21 | 2022-04-05 | Verfahren zur herstellung eines bauteils mit kavität und bauteil mit kavität |
US18/287,727 US20240186460A1 (en) | 2021-04-21 | 2022-04-05 | Method for producing a component having a cavity, and component having a cavity |
Applications Claiming Priority (2)
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DE102021110089.5A DE102021110089A1 (de) | 2021-04-21 | 2021-04-21 | Verfahren zur herstellung eines bauteils mit kavität und bauteil mit kavität |
DE102021110089.5 | 2021-04-21 |
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WO2022223284A1 true WO2022223284A1 (de) | 2022-10-27 |
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PCT/EP2022/058954 WO2022223284A1 (de) | 2021-04-21 | 2022-04-05 | Verfahren zur herstellung eines bauteils mit kavität und bauteil mit kavität |
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US (1) | US20240186460A1 (de) |
CN (1) | CN117178379A (de) |
DE (2) | DE102021110089A1 (de) |
WO (1) | WO2022223284A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004045950A1 (de) * | 2004-09-22 | 2006-03-30 | Osram Opto Semiconductors Gmbh | Gehäuse für ein optoelektronisches Bauelement, optoelektronisches Bauelement und Verfahren zur Herstellung eines optoelektronischen Bauelements |
DE102010045403A1 (de) * | 2010-09-15 | 2012-03-15 | Osram Opto Semiconductors Gmbh | Optoelektronisches Bauelement |
EP2919284A1 (de) * | 2014-03-14 | 2015-09-16 | Citizen Electronics Co., Ltd. | Lichtemittierende Vorrichtung |
EP3078063A1 (de) * | 2013-12-06 | 2016-10-12 | Koninklijke Philips N.V. | Montageanordnung und beleuchtungsvorrichtung |
US20190326488A1 (en) * | 2016-12-15 | 2019-10-24 | Lumileds Llc | Led module with high near field contrast ratio |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8878215B2 (en) | 2011-06-22 | 2014-11-04 | Lg Innotek Co., Ltd. | Light emitting device module |
US10193042B1 (en) | 2017-12-27 | 2019-01-29 | Innolux Corporation | Display device |
-
2021
- 2021-04-21 DE DE102021110089.5A patent/DE102021110089A1/de not_active Withdrawn
-
2022
- 2022-04-05 CN CN202280030000.9A patent/CN117178379A/zh active Pending
- 2022-04-05 US US18/287,727 patent/US20240186460A1/en active Pending
- 2022-04-05 DE DE112022000750.8T patent/DE112022000750A5/de active Pending
- 2022-04-05 WO PCT/EP2022/058954 patent/WO2022223284A1/de active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004045950A1 (de) * | 2004-09-22 | 2006-03-30 | Osram Opto Semiconductors Gmbh | Gehäuse für ein optoelektronisches Bauelement, optoelektronisches Bauelement und Verfahren zur Herstellung eines optoelektronischen Bauelements |
DE102010045403A1 (de) * | 2010-09-15 | 2012-03-15 | Osram Opto Semiconductors Gmbh | Optoelektronisches Bauelement |
EP3078063A1 (de) * | 2013-12-06 | 2016-10-12 | Koninklijke Philips N.V. | Montageanordnung und beleuchtungsvorrichtung |
EP2919284A1 (de) * | 2014-03-14 | 2015-09-16 | Citizen Electronics Co., Ltd. | Lichtemittierende Vorrichtung |
US20190326488A1 (en) * | 2016-12-15 | 2019-10-24 | Lumileds Llc | Led module with high near field contrast ratio |
Also Published As
Publication number | Publication date |
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US20240186460A1 (en) | 2024-06-06 |
CN117178379A (zh) | 2023-12-05 |
DE102021110089A1 (de) | 2022-10-27 |
DE112022000750A5 (de) | 2023-11-09 |
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