摘要:
In at least one embodiment, the optoelectronic semiconductor component includes an optically active area that is formed with a crystalline semiconductor material that contains at least one of the substances gallium or aluminum. Furthermore, the semiconductor component contains at least one facet on the optically active area. Furthermore, the semiconductor component contains at least one boundary layer, containing sulfur or selenium, with a thickness of up to five monolayers, wherein the boundary layer is located on the facet. Such a semiconductor component has a high destruction threshold relative to the optical powers that occur during operation of the semiconductor component.
摘要:
A method for producing an electrical contact of an optoelectronic semiconductor chip (1), comprising providing a mirror layer (2), comprised of a metal or metal alloy, over the semiconductor chip; providing a protective layer (3) over said mirror layer; providing a layer sequence of a barrier layer and a coupling layer (5) over said protective layer; and providing a solder layer (8) over said layer sequence.
摘要:
A method for producing an electrical contact of an optoelectronic semiconductor chip (1), comprising providing a mirror layer (2), comprised of a metal or metal alloy, over the semiconductor chip; providing a protective layer (3) over said mirror layer; providing a layer sequence of a barrier layer and a coupling layer (5) over said protective layer; and providing a solder layer (8) over said layer sequence.
摘要:
An electrical contact for an optoelectronic device which includes a mirror layer (2) of a metal or a metal alloy, a protective layer (3), which serves for reducing the corrosion of the mirror layer (2), a barrier layer (4), a coupling layer (5), and a solder layer (8). A contact of this type is distinguished by high reflectivity, good ohmic contact with respect to the semiconductor, good adhesion on the semiconductor and good adhesion of the layers forming the contact with one another, good thermal stability, high stability with respect to environmental influences, and also solderability and patternability.
摘要:
A method for micropatterning a radiation-emitting surface of a semiconductor layer sequence for a thin-film light-emitting diode chip, wherein the semiconductor layer sequence is grown on a substrate, a mirror layer is formed or applied on the semiconductor layer sequence, which reflects back into the semiconductor layer sequence at least part of a radiation that is generated in the semiconductor layer sequence during the operation thereof and is directed toward the mirror layer, the semiconductor layer sequence is separated from the substrate, and a separation surface of the semiconductor layer sequence, from which the substrate is separated, is etched by an etchant which predominantly etches at crystal defects and selectively etches different crystal facets at the separation surface.
摘要:
A method for micropatterning a radiation-emitting surface of a semiconductor layer sequence for a thin-film light-emitting diode chip. The semiconductor layer sequence is grown on a substrate. A mirror layer is formed or applied on the semiconductor layer sequence, which reflects back into the semiconductor layer sequence at least part of a radiation that is generated in the semiconductor layer sequence during the operation thereof and is directed toward the mirror layer. The semiconductor layer sequence is separated from the substrate by means of a lift-off method, in which a separation zone in the semiconductor layer sequence is at least partly decomposed in such a way that anisotropic residues of a constituent of the separation zone, in particular a metallic constituent of the separation layer, remain at the separation surface of the semiconductor layer sequence, from which the substrate is separated. The separation surface—provided with the residues—of the semiconductor layer sequence with a dry etching method, a gaseous etchant or a wet-chemical etchant, wherein the anisotropic residues are at least temporarily used as an etching mask. A semiconductor chip is produced according to such a method.
摘要:
A semiconductor chip which emits electromagnetic radiation is presented. The chip includes an epitaxially produced semiconductor layer stack based on nitride semiconductor material, which includes an n-conducting semiconductor layer, a p-conducting semiconductor layer, and an electromagnetic radiation generating region, which is arranged between these two semiconductor layers. The chip further includes a base on which the semiconductor layer stack is arranged, and a mirror layer, which is arranged between the semiconductor layer stack and the base. The n-conducting semiconductor layer faces away from the base, and the n-conducting semiconductor layer or an outcoupling layer located on the n-conducting semiconductor layer has a radiation-outcoupling surface which, in turn, includes planar outcoupling sub-surfaces, which are positioned obliquely with respect to a main plane of the radiation-generating region and each form an angle of between 15° and 70° with this plane.
摘要:
Semiconductor chip which emits electromagnetic radiation, and method for fabricating it. To improve the light yield of semiconductor chips which emit electromagnetic radiation, a textured reflection surface (131) is integrated on the p-side of a semiconductor chip. The semiconductor chip has an epitaxially produced semiconductor layer stack (1) based on GaN, which comprises an n-conducting semiconductor layer (11), a p-conducting semiconductor layer (13) and an electromagnetic radiation generating region (12) which is arranged between these two semiconductor layers (11, 13). The surface of the p-conducting semiconductor layer (13) which faces away from the radiation-generating region (12) is provided with three-dimensional pyramid-like structures (15). A mirror layer (40) is arranged over the whole of this textured surface. A textured reflection surface (131) is formed between the mirror layer (40) and the p-conducting semiconductor layer (13). The textured reflection surface (131) can increase the amount of light which is decoupled at the radiation-outcoupling surface (111) by virtue of the fact that a beam (3), after double reflection on the reflection surface (131), is more likely not to be totally reflected.
摘要:
A method for producing a semiconductor component, in particular a thin-film component, a semiconductor layer being separated from a substrate by irradiation with a laser beam having a plateaulike spatial beam profile. Furthermore, the semiconductor layer, prior to separation, is applied to a carrier with an adapted thermal expansion coefficient. The method is suitable in particular for semiconductor layers containing a nitride compound semiconductor.
摘要:
A method is provided for fabricating a useful layer containing at least one semiconductor layer, in which the useful layer is separated from a carrier. In this case, the useful layer is applied to the carrier and an auxiliary carrier is applied to that side of the useful layer that is remote from the carrier by a connecting layer at a joining temperature. Afterward, the carrier is stripped away at a temperature that is greater than or equal to the joining temperature and is less than the melting point of the connecting layer. At least a part of the useful layer together with the auxiliary carrier is removed from the carrier.