Patent ID: 6534797
Filing Date: 2003-03-18
Classification: H01L

Abstract:
A semiconductor structure for light emitting devices that can emit in the red to ultraviolet portion of the electromagnetic spectrum, said structure comprising:a first cladding layer of AlxInyGa1âˆ’xâˆ’yN, where 0&lE;x&lE;1 and 0&lE;y<1 and (x+y)&lE;1; a second cladding layer of AlxInyGa1âˆ’xâˆ’yN, where 0&lE;x&lE;1 and 0&lE;y<1 and (x+y)&lE;1; and an active layer of AlxInyGa1âˆ’xâˆ’yN, where 0&lE;x<1 and 0&lE;y&lE;1 and 0&lE;(x+y)&lE;1, said active layer positioned between said first cladding layer and said second cladding layer; wherein said first and second cladding layers have respective bandgaps that are each larger than the bandgap of said active layer; and wherein at least one of the layers selected from the group consisting of said first cladding layer, said second cladding layer, and said active layer is characterized by the absence of gallium.