Patent ID: 7317202

Claim:
A method for fabricating an epitaxial component layer sequence based on a first III/V compound semiconductor material system with a first group V element on a substrate or a buffer layer, the substrate or the buffer layer comprising a material based on a second III/V compound semiconductor material system with a second group V element, which is different from the first group V element, wherein at least one layer sequence with a first and a second III/V compound semiconductor material layer is applied to the substrate or to the buffer layer before the application of the epitaxial component layer sequence, the first and second III/V compound semiconductor material layers having different compositions from one another and containing both the first and the second group V elements, and the first III/V compound semiconductor material layer has a quinternary composition and the second III/V compound semiconductor material layer has a ternary composition; wherein a plurality of layer sequences with in each case a first and a second III/V compound semiconductor material layer are applied to the substrate or to the buffer layer before the application of the epitaxial component layer sequence.