One object to be achieved consists in specifying an optoelectronic arrangement that can be produced in a simplified manner. A further object to be achieved consists in specifying a simplified method for producing an optoelectronic arrangement.

An optoelectronic arrangement is specified. The optoelectronic arrangement can be provided for emitting and/or for absorbing an electromagnetic radiation. The optoelectronic arrangement can be a light emitting diode arrangement, such as a display, for example, and/or a photodiode arrangement.

In accordance with at least one embodiment, the optoelectronic arrangement comprises a moulded body having a top surface and a bottom surface facing away from the top surface. The moulded body is embodied as a carrier of the optoelectronic arrangement. The moulded body can be formed with a plastics material and/or a, more particularly synthetic, resin or consist of one of these materials. In particular, the moulded body is not a growth substrate of the optoelectronic arrangement. The moulded body can be embodied in an electrically insulating fashion. Furthermore, the moulded body can be embodied in an integral fashion, that is to say in a continuous fashion. By way of example, the moulded body is a potting component. Furthermore, the moulded body can be embodied in a layerlike fashion, for instance as a conformally overmoulding, preferably electrically insulating, layer.

The moulded body has a main extension plane in which it extends in lateral directions. The top surface and the bottom surface of the moulded body respectively form a principal plane of the moulded body. Perpendicular to the main extension plane, in a vertical direction, the moulded body has a thickness. The thickness of the moulded body is small in comparison with the maximum extension of the moulded body in the lateral directions. By way of example, the thickness of the moulded body is at least 80 μm and at most 120 μm. Alternatively, it is possible for the thickness of the moulded body to be at least 1 μm and at most 10 μm, preferably at most 8 μm.

In accordance with at least one embodiment, the optoelectronic arrangement comprises a first pixel group. A multiplicity of pixels are assigned to the first pixel group. In other words, the first pixel group comprises a multiplicity of pixels. Each of the pixels of the first pixel group has a first semiconductor region, a second semiconductor region and an active region. The active region emits and/or absorbs the electromagnetic radiation during the operation of the arrangement. The first semiconductor region, the second semiconductor region and the active region can in each case be formed with a (compound) semiconductor material or consist thereof. By way of example, the first semiconductor region, the second semiconductor region and the active region are based in each case on GaN. The pixels can be individual segments of the arrangement. The pixels can have in the lateral directions in each case a maximum extent of at least 30 μm and at most 300 μm, preferably at most 100 μm and particularly preferably at most 50 μm.

Here and hereinafter a “pixel group” can be a set of pixels which are grouped on the basis of common properties. The common properties are for example a common electrical contacting of the first semiconductor regions and/or of the second semiconductor regions of the pixels of a pixel group. The first semiconductor regions and/or the second semiconductor regions of the pixels of a pixel group can then be at a common electrical potential. Alternatively or additionally, the common properties can be provided by a common spatial arrangement of the pixels of a pixel group, such as, for example, an arrangement in a common row or a common column of a matrix.

In accordance with at least one embodiment, the optoelectronic arrangement comprises a multiplicity of separating structures. The separating structures are arranged between the pixels. The separating structures can serve for spatially separating at least portions of the pixels. Furthermore, the pixels can be optically decoupled from one another by means of the separating structures.

In accordance with at least one embodiment, the optoelectronic arrangement comprises at least one first contact structure. The at least one first contact structure comprises a first contact plane and a first contact location. The first contact location is freely accessible at the bottom surface. In particular, the first contact location is electrically contactable externally at the bottom surface. The first contact structure can be embodied in an electrically conductive fashion. In particular the first contact plane and the first contact location can be formed with at least one metal or consist thereof. All components of the first contact structure can be at a common electrical potential. In other words, the first contact plane, the first contact location and if appropriate further components of the first contact structure are electrically conductively connected to one another.

In accordance with at least one embodiment of the optoelectronic arrangement, the pixels are arranged at the top surface alongside one another. Here and hereinafter, “arranged at the top surface” can mean that the pixels are arranged in a common plane running parallel to the top surface within the scope of the production tolerances. Further components of the arrangement, such as, for example, the first contact plane and/or an insulation layer, can then be arranged between the pixels and the moulded body. Alternatively or additionally, the pixels can directly adjoin the top surface at least in some locations.

Each of the pixels can have a radiation passage surface facing away from the moulded body. The electromagnetic radiation emitted and/or absorbed by the active region passes through the radiation passage surface of the pixel. The radiation passage surfaces can form for example a common luminous surface of the arrangement that is segmented on account of the radiation passage surfaces of the pixels separated by means of the separating structures.

The pixels can furthermore be arranged laterally at a distance from one another. By way of example, a lateral distance between two adjacent pixels is at least 1 μm and at most 20 μm, preferably at most 7 μm, and particularly preferably at most 5 μm. Here and hereinafter, the lateral distance is the minimum distance between two outer surfaces of the pixels in one of the lateral directions. Furthermore, here and hereinafter, pixels can be “adjacent” if they are arranged directly alongside one another in the lateral directions. In each case at least one of the separating structures can be arranged between two pixels. By way of example, the pixels are arranged in a matrixlike fashion, that is to say in rows and columns, at the top surface.

In accordance with at least one embodiment of the optoelectronic arrangement, the first semiconductor regions and/or the second semiconductor regions of adjacent pixels are electrically insulated from one another by means of the separating structures. For this purpose, the separating structures can comprise an electrically insulating material. The electrically insulating material can be a passivation layer, for example, which can be formed with an oxide and/or a nitride, a plastic or a gas, such as, for example, an ambient atmosphere in an apparatus in which the arrangement is produced. Furthermore, the first semiconductor regions and/or the second semiconductor regions of adjacent pixels can be spatially separated from one another by means of the separating structures.

In accordance with at least one embodiment of the optoelectronic arrangement, a first contact structure is assigned one-to-one to the first pixel group. In particular, it is possible for a first contact location to be assigned one-to-one to the first pixel group.

In accordance with at least one embodiment, the pixels of the first pixel group are electrically conductively connected to one another by means of the first contact plane, in particular the first contact plane of the first contact structure assigned one-to-one to said first pixel group. The first contact plane can be at least regionally in direct contact with the first semiconductor regions of the pixels of the first pixel group. It is possible for the first semiconductor regions to be electrically conductively connected to one another exclusively by means of the first contact plane.

In accordance with at least one embodiment of the optoelectronic arrangement, the first semiconductor regions of the pixels of the first pixel group are electrically conductively contactable by means of the first contact location, in particular the first contact location of the first contact structure assigned one-to-one to said first pixel group. For this purpose, the first contact location can be electrically conductively connected to the first contact plane. By way of example, the arrangement is a surface mountable device (SMD). An electrical contacting of the first contact location can then be carried out by means of a soldering connection.

In accordance with at least one embodiment, the optoelectronic arrangement comprises a moulded body embodied as a carrier and having a top surface and a bottom surface facing away from the top surface, a first pixel group, a multiplicity of separating structures and a first contact structure. The first pixel group has a multiplicity of pixels, each comprising a first semiconductor region, a second semiconductor region and an active region that emits and/or absorbs electromagnetic radiation during the operation of the arrangement. The multiplicity of separating structures are arranged between the pixels. The first contact structure has a first contact plane and a first contact location that is freely accessible at the bottom surface. The pixels are arranged at the top surface alongside one another. The first semiconductor regions and/or the second semiconductor regions of the adjacent pixels are electrically insulated from one another by means of the separating structures. A first contact structure is assigned one-to-one to the first pixel group. Furthermore, the first semiconductor regions of the pixels of the first pixel group are electrically conductively connected to one another by means of the first contact plane and are electrically contactable by means of the first contact location.

In accordance with at least one embodiment of the optoelectronic arrangement, the first contact location comprises the sole contact location of the at least one first contact structure that is freely accessible at the bottom surface of the moulded body. In other words, the first contact structure has a single first contact location. In particular, it is possible for the first semiconductor regions of the pixels of the first pixel group to be electrically contactable externally exclusively by means of the first contact location.

In accordance with at least one embodiment of the optoelectronic arrangement, the moulded body is embodied as a mechanically stabilizing component of the arrangement. Here and hereinafter, “mechanically stabilizing” means that the mechanical handling of the optoelectronic arrangement is improved by means of the moulded body and as a result, for example, a higher external force can act on the optoelectronic arrangement, without the latter being destroyed. In particular, the optoelectronic arrangement can become mechanically self-supporting by means of the moulded body, that is to say that the optoelectronic arrangement can be handled for instance in the context of a manufacturing method with tools such as tweezers, for example, without a further supporting element having to be present.

The use of a moulded body as a mechanically stabilizing element enables in particular the simplified production of the optoelectronic arrangement. Furthermore, the moulded body guarantees a high mechanical stability.

It is furthermore possible for a conversion material for the wavelength conversion of the electromagnetic radiation emitted and/or absorbed by the active regions to be applied on at least one of the radiation passage surfaces, preferably on at least 50% of the radiation passage surfaces, and particularly preferably on all of the radiation passage surfaces. By way of example, the conversion material can be applied to the radiation passage surfaces as potting. The potting can be formed with a silicone or an epoxy resin into which wavelength-converting particles, such as, for example, phosphor particles or quantum dots are introduced. Alternatively, the conversion material can be present as a converter lamina, in particular as a ceramic converter lamina. In particular, it is possible for a single converter lamina to be applied on at least 50% of the radiation passage surfaces. The converter lamina can then likewise have a mechanically stabilizing effect. By way of example, the converter lamina can be produced by means of electrophoresis. Moreover, the conversion material can be applied to the radiation passage surfaces as a layer, for example by means of spray coating.

In accordance with at least one embodiment of the optoelectronic arrangement, the moulded body is formed with at least one of the following materials or consists of one of the following materials: epoxy resin, silicone resin. These materials can be applied in particular by means of a compression moulding method, an injection moulding method and/or a transfer moulding method.

In accordance with at least one embodiment of the optoelectronic arrangement, the separating structures are formed by trenches that are free of the material of the pixels. The first semiconductor regions, the active regions and/or the second semiconductor regions of adjacent pixels are spatially separated from one another by the trenches. In particular, the first semiconductor regions, the active regions and/or the second semiconductor regions are not connected to one another by a semiconductor material. The trenches can be etching trenches, for example, which have been introduced into a semiconductor layer sequence from which the first semiconductor regions, the active regions and/or the second semiconductor regions can emerge during a production method.

In accordance with at least one embodiment of the optoelectronic arrangement, the moulded body extends into the trenches. In other words, the moulded body is arranged at least in some locations between the pixels. In particular the trenches can be completely filled with the moulded body. By means of the moulded body introduced into the trenches, an anchoring of the moulded body to the pixels can be carried out. Furthermore, the mechanical stability of the arrangement can additionally be increased by the introduction of the moulded body into the trenches.

The moulded body can be embodied in a radiation-nontransmissive fashion. An optical isolation of the pixels can then be carried out for example by means of the moulded body introduced into the trenches.

Furthermore, it is possible for the moulded body to be embodied in a radiation-reflecting fashion. By way of example, for this purpose, radiation-reflecting particles can be embedded into the moulded body. Here and hereinafter, a component of the arrangement is “radiation-nontransmissive” if it has a transmission factor of at most 40%, preferably at most 20% and particularly preferably at most 10% for the electromagnetic radiation emitted and/or absorbed by the active regions. Furthermore, here and hereafter, a component of the arrangement is “radiation-reflecting” if it has a reflectance of at least 60%, preferably at least 80%, and particularly preferably at least 90%, for the electromagnetic radiation.

In accordance with at least one embodiment of the optoelectronic arrangement, the first semiconductor regions and the active regions of adjacent pixels are spatially completely separated from one another. In other words, the first semiconductor regions and the active regions of adjacent pixels are not connected to one another by a semiconductor material. Furthermore, the second semiconductor regions of adjacent pixels are connected to one another via intermediate regions. The intermediate regions are formed with the material of the second semiconductor regions. The second semiconductor regions of the pixels can thus be embodied in a continuous and integral fashion. In this case, it is possible for the intermediate regions to have a smaller extent in the vertical direction than the second semiconductor regions.

In accordance with at least one embodiment of the optoelectronic arrangement, a space between the pixels is at least regionally free of a semiconductor material. In particular, the space between the pixels can be completely free of a semiconductor material. In other words, it is possible for the first semiconductor regions, the active regions and the second regions of the pixels not to be connected to one another by a semiconductor material. The space between the pixels can be the separating structures formed by the trenches.

In accordance with at least one embodiment of the optoelectronic arrangement, a multiplicity of first pixel groups are present. A first contact structure is assigned one-to-one to each of the first pixel groups. The pixels of each of the first pixel groups can be electrically conductively connected to one another by means of the first contact plane assigned one-to-one to the respective first pixel group. Furthermore, the pixels of each of the first pixel groups can be electrically contactable electrically conductively with the first contact location assigned, in particular one-to-one, to the respective first pixel group.

In accordance with at least one embodiment, the optoelectronic arrangement comprises a multiplicity of second pixel groups. Furthermore, the arrangement comprises at least one second contact structure having at least one second contact plane and a second contact location. The second contact location can be the sole contact location of the second contact structure that is freely accessible at the bottom surface. The second contact location is freely accessible at the bottom surface. In other words, the second contact location is electrically contactable at the bottom surface. The second contact structure can comprise the same materials or be formed from the same materials as the first contact structure.

In accordance with at least one embodiment of the optoelectronic arrangement, at least one pixel of each of the first pixel groups is uniquely assigned to each second pixel group. Conversely, it is possible for a first pixel group to be uniquely assigned to each pixel of the second pixel group. In other words, a single first pixel group and a single second pixel group are assigned to each pixel of the optoelectronic arrangement. By way of example, the pixels are arranged in a matrixlike fashion at the top surface, wherein the pixels of the matrix that are arranged in a row are respectively assigned to one of the first pixel groups, while the pixels of the matrix that are arranged in a column are respectively assigned to one of the second pixel groups.

Furthermore, a second contact structure is assigned one-to-one to each second pixel group. The second semiconductor regions of the pixels of the second pixel group are electrically conductively connected to one another by means of the second contact plane and electrically contactable by means of the second contact location. In particular, the pixels of the second pixel group are electrically contactable with the second contact location of the second contact location assigned to said second pixel group. For this purpose, the second contact location can have the same construction as the first contact location.

In accordance with at least one embodiment of the optoelectronic arrangement, the at least one first contact structure has at least one first plated-through hole which extends in a vertical direction completely through the moulded body. Alternatively or additionally, the second contact structure present, if appropriate, can have at least one second plated-through hole which extends in a vertical direction completely through the moulded body. The first plated-through hole and/or the second plated-through hole, if appropriate, can have the same extent as the moulded body in the vertical direction. The first plated-through hole and/or the second plated-through hole, if appropriate, are/is electrically conductively connected to the first contact plane and/or to the second contact plane, respectively. Furthermore, the first plated-through hole and/or the second plated-through hole, if appropriate, are/is electrically conductively connected to the first contact location and/or to the second contact location, respectively.

By way of example, the plated-through hole extends from the bottom surface of the moulded body completely through the moulded body. Particularly preferably, the plated-through hole extends from the bottom surface of the moulded body completely through the moulded body and through the active layer of the semiconductor layer sequence. In this case, the plated-through hole is preferably formed by a single electrically conductive element, for example composed of a metal. The contact structure can be formed by the plated-through hole, the contact location and the contact plane. In accordance with one embodiment, the plated-through hole is in this case free of electronic components, such as switches, transistors or the like.

It is possible, in particular, for only the at least one first and the at least one second contact location to be provided for electrically contacting the arrangement. The arrangement then comprises exclusively electrical contact locations which are arranged at the bottom surface and are freely accessible at the latter. The electrical connection of the at least one first and/or of the at least one second contact location to the first and/or second semiconductor regions, respectively, in particular the first and/or second contact plane, respectively, can be effected in a wire-free fashion by means of the at least one first and/or the at least one second plated-through hole, respectively. The arrangement is in particular free of a wire contacting.

The use of plated-through holes for electrically connecting the contact locations and the semiconductor regions makes it possible, in particular, to provide a simply contactable arrangement without wire contacts. The electrical contacting can be effected in particular exclusively at the bottom surface of the moulded body. As a result, an arrangement comprising pixels arranged in a matrixlike fashion, in particular, can be realized in a simple manner. The optoelectronic arrangement can thus be a so-called flip-chip.

In accordance with at least one embodiment of the optoelectronic arrangement, the material of the first plated-through hole and/or of the second plated-through hole, if appropriate, is electrodeposited. The first and/or the second plated-through hole can comprise in each case at least one metal in particular copper, nickel, tin and/or gold. By way of example, the first and/or the second plated-through hole are/is electrodeposited onto a part of the first contact plane and/or of the second contact plane.

It is furthermore possible for the at least one first plated-through hole and/or the at least one second plated-through hole, if appropriate, to form a mechanically stabilizing component of the arrangement. By way of example, the first plated-through hole and/or the second plated-through hole together with the moulded body form the sole mechanically stabilizing component of the arrangement.

In accordance with at least one embodiment of the optoelectronic arrangement, all of the first semiconductor regions, all of the second semiconductor regions and/or all of the active regions were produced from a common, in particular single, first semiconductor layer, a common, in particular single, second semiconductor layer and/or a common, in particular single, active layer respectively. In other words, the pixels are produced by structuring and at least partial removal of a semiconductor layer sequence comprising a first semiconductor layer, a second semiconductor layer and an active layer.

In particular, it is possible that the pixels have been fitted jointly, that is to say in the wafer assemblage, at the top surface of the moulded body. By way of example, for this purpose, the semiconductor layer sequence is structured after the fitting of the moulded body. As a result, it is possible to provide an arrangement having a segmented luminous surface in which adjacent pixels have a small lateral distance. The lateral distances between the pixels are then limited for example only by the technique used for the segmentation. By way of example, the lateral distance between adjacent pixels with the use of a photographic technique is at most 5 μm in approximately 99.7% of the cases (so-called called 3-sigma range). Furthermore, it is possible to produce pixels having small extents in the lateral directions. In contrast to the segmented pixels described above, the lateral distance in the case of pixels that were fitted by means of individual positioning of the previously produced pixels at the top surface is at least 10 μm.

Furthermore, a method for producing an optoelectronic arrangement is specified. The optoelectronic arrangement is preferably producible by the method described here. That is to say that all features disclosed for the arrangement are also disclosed for the method, and vice versa.

In accordance with at least one embodiment of the method, firstly a semiconductor layer sequence is provided on a growth substrate. The semiconductor layer sequence comprises a first semiconductor layer, a second semiconductor layer and an active layer. The active layer can be provided for emitting and/or absorbing electromagnetic radiation.

In accordance with at least one embodiment of the method, the separating structures and the pixels are produced. For this purpose, the semiconductor layer sequence is removed in some locations using an etching process. In particular, trenches can be produced in the semiconductor layer sequence, which trenches can form separating structures between the pixels. The structuring of the pixels can be carried out using a photographic technique, for example.

In accordance with at least one embodiment of the method, the moulded body is produced at a side of the semiconductor layer sequence facing away from the growth substrate. In particular, it is possible for the moulded body to be produced at the side of the pixels facing away from the growth substrate. Here and hereinafter, “producing” the moulded body means that the material of the moulded body is applied at the semiconductor layer sequence. In particular, the material of the moulded body for producing the moulded body is present in liquid, granular, pasty and/or gaseous form.

In accordance with at least one embodiment of the method, the growth substrate is detached. The detaching can be carried out for example using an etching process or by means of laser lift-off. The optoelectronic arrangement can thus be free of a growth substrate.

In accordance with at least one embodiment of the method, the latter comprises the following steps:

providing a semiconductor layer sequence comprising a first semiconductor layer, a second semiconductor layer and an active layer, on a growth substrate,

producing the separating structures and the pixels by removing the semiconductor layer sequence in some locations using an etching process,

producing the moulded body at a side of the semiconductor layer sequence facing away from the growth substrate, and

detaching the growth substrate.

It is possible for the method steps to be carried out in the order indicated.

In accordance with at least one embodiment of the method, applying the moulded body and detaching the growth substrate are carried out before producing the separating structure and the pixels. In other words, the structuring of the pixels is carried out after the moulded body has been applied. In particular, the etching process is carried out after the moulded body has been produced at the semiconductor layer sequence.

In accordance with at least one embodiment of the method, the moulded body is applied using a potting method. Here and hereinafter, by way of example, injection moulding methods, compression moulding methods or transfer moulding methods are regarded as potting methods.

Alternatively or additionally, it is possible for the moulded body to be applied by lamination as a film, to be applied as lacquer and/or to be applied by means of chemical or physical vapour deposition.

