The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 2011
Filed:
Jul. 20, 2007
Christoph Eichler, Tegernheim, DE;
Alfred Lell, Maxhuette-Haidhof, DE;
Andreas Miler, Kaufering, DE;
Marc Schillgalies, Regensburg, DE;
Christoph Eichler, Tegernheim, DE;
Alfred Lell, Maxhuette-Haidhof, DE;
Andreas Miler, Kaufering, DE;
Marc Schillgalies, Regensburg, DE;
Osram Opto Semiconductors GmbH, Regensburg, DE;
Abstract
The semiconductor layer structure includes an active layer and a superlattice composed of stacked layers of III-V compound semiconductors of a first and at least one second type. Adjacent layers of different types in the superlattice differ in composition with respect to at least one element. The layers have predefined layer thicknesses, such that the layer thicknesses of layers of the first type and of the layers of the second type increase from layer to layer with increasing distance from an active layer. An increasing layer thickness within the layers of the first and the second type is suitable for adapting the electrical, optical and epitaxial properties of the superlattice to given requirements in the best possible manner.