Osram Opto Semiconductors Gmbh

Osram Opto Semiconductor Gmbh

Andreas Leber

Siegfried Herrmann

Christine Rafael

Alfred Lell

Berthold Hahn

Matthias Sabathil

Lutz Höppel

Matthias Peter

Martin Strassburg

Ulrich Zehnder

Rainer Butendeich

Andreas Weimar

Laura Kreiner

Tetsuya Taki

Helmut Fischer

Nikolaus Gmeinwieser

Nicole Heitzer

Christine Höss

Thomas Bauer

Marie Assmann

Eva-Maria Rummel

The invention relates to various aspects of a μ-LED or a μ-LED array for augmented reality or lighting applications, in particular in the automotive field. The μ-LED is characterized by particularly small dimensions in the range of a few μm.

μ-LED, μ-LED device, display and method for the same

An optoelectronic device includes an optoelectronic semiconductor chip having a first and a second semiconductor layer having a first and second conductivity type, respectively; a first and a second current spreading layer; a dielectric reflective layer; and a plurality of first electrical connecting elements. The first semiconductor layer and the second semiconductor layer are stacked. The first current spreading layer and the second current spreading layer are arranged on a side of the first semiconductor layer facing away from the second semiconductor layer. The dielectric reflective layer is arranged between the first semiconductor layer and the first current spreading layer. The plurality of first electrical connecting elements extends through the dielectric reflective layer and is suitable to electrically connect the first semiconductor layer to the first current spreading layer. The second current spreading layer is electrically connected to the second semiconductor layer.

Optoelectronic component having a dielectric reflective layer and production method for same

The invention relates to various aspects of a &#x3bc;-LED or a &#x3bc;-LED array for augmented reality or lighting applications, in particular in the automotive field. The &#x3bc;-LED is characterized by particularly small dimensions in the range of a few &#x3bc;m.

&#x3bc;-LED, &#x3bc;-LED device, display and method for the same

A method can be used to provide at least one optoelectronic semiconductor component, A carrier includes a first surface and a second surface opposite the first surface. At least one optoelectronic semiconductor chip is arranged on the first surface of the carrier. The optoelectronic semiconductor chip is formed with at least one n-side region and at least one p-side region, and is applied with the n-side region or the p-side region to the first surface. An electrically insulating enclosure is arranged on exposed points of the outer faces of the semiconductor chip and of the first surface of the carrier. The electrically insulating enclosure is partially removed. After removal at least one major face, remote from the carrier, of the optoelectronic semiconductor chip is free of the electrically insulating enclosure at least in places.

Method for producing at least one optoelectronic semiconductor component

An optoelectronic semiconductor component comprising a semiconductor layer sequence () based on a nitride compound semiconductor and containing an n-doped region (), a p-doped region () and an active zone () arranged between the n-doped region () and the p-doped region () is specified. The p-doped region () comprises a p-type contact layer () composed of InAlGaN where 0&#x2266;x&#x2266;1, 0&#x2266;y&#x2266;1 and x+y&#x2266;1. The p-type contact layer () adjoins a connection layer () composed of a metal, a metal alloy or a transparent conductive oxide, wherein the p-type contact layer () has first domains () having a Ga-face orientation and second domains () having an N-face orientation at an interface with the connection layer ().

Optoelectronic semiconductor component

In at least one embodiment of the optoelectronic semiconductor chip (), the latter comprises a semiconductor layer sequence () comprising at least one active layer () designed for generating an electromagnetic radiation. Furthermore, the optoelectronic semiconductor chip () has coupling-out structures (), which are fitted at least indirectly on a radiation passage area () of the semiconductor layer sequence (). In this case, a material of the coupling-out structures () is different than a material of the semiconductor layer sequence (). The refractive indices of the materials of the coupling-out structures () and of the semiconductor layer sequence () deviate from one another by at most 30%. Furthermore, facets () of the coupling-out structures () have a total area amounting to at least 30% of an area content of the radiation passage area ().

Optoelectronic semiconductor chip and method for producing an optoelectronic semiconductor chip

A method for fabricating at least one mesa or ridge structure in a layer or layer sequence, in which a sacrificial layer () is applied and patterned above the layer or layer sequence. A mask layer is applied and patterned above the sacrificial layer for definition of the mesa or ridge dimensions. The sacrificial layer () and of the layer or layer sequence are removed so that the mesa or ridge structure is formed in the layer or layer sequence. A part of the sacrificial layer () is selectively removed from the side areas thereof which have been uncovered in the previous step, so that a sacrificial layer remains which is narrower in comparison with a layer that has remained above the sacrificial layer as seen from the layer or layer sequence. A coating is applied at least to the sidewalls of the structure produced in the previous steps so that the side areas of the residual sacrificial layer are not completely overformed by the coating material. The sacrificial layer () is removed so that the layer that has remained above the sacrificial layer as seen from the layer or layer sequence is lifted off. A method is also disclosed for fabricating at least one gain-controlled laser diode in a layer sequence, in which method steps analogous to those described above are employed.

Method for fabricating at least one mesa or ridge structure or at least one electrically pumped region in a layer or layer sequence

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Wuppertal, Germany

Andreas Leber