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:
Feb. 22, 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 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, at least two layers of the same type have a different content of the at least one element, the content of the at least one element is graded within a layer of the superlattice, and the layers of the superlattice contain dopants in predefined concentrations, with the superlattice comprising layers that are doped with different dopants. In this way, the electrical, optical and epitaxial properties of the superlattice can be adapted in the best possible manner to given requirements, particularly epitaxial constraints.