Patent ID: 6775314
Filing Date: 2004-08-10
Classification: B82Y,H01S

Abstract:
A supported distributed Bragg reflector, comprising:a substrate; a nucleation layer deposited on said substrate, said nucleation layer being of sufficient thickness to promote contiguous growth of subsequent deposited layers: an interlayer deposited on said nucleation layer, said interlayer controlling mismatch-induced stress and suppressing formation of cracks and said interlayer comprising a material selected from AlN, AlyGa1-yN, and AlyB1-yN, where 0multiple pairs of (AlwGaxB1-w-xN/Alwâ€²Gaxâ€²B1-wâ€²-xâ€²N layers, where 0&lE;w&lE;1,0&lE;x&lE;1,0&lE;wâ€²&lE;1,0&lE;xâ€²&lE;1, deposited on said interlayer, thereby forming a supported distributed Bragg reflector.