Patent ID: 6291258
Filing Date: 2001-09-18
Classification: H01L

Abstract:
A method for making a semiconductor photonic device comprising a substrate; a ZnO buffer layer on the substrate; and a semiconductor compound represented by In.sub.x GA.sub.y Al.sub.z N wherein x+y+z=1, 0.ltoreq.x.ltoreq.1, 0.ltoreq.y.ltoreq.1 and 0.ltoreq.z.ltoreq.1 on the ZnO buffer layer, wherein the ZnO buffer layer has a lattice constant of about 5.2070 .ANG. or more in the c-axis directionwhich comprises adjusting the lattice constant in the c-axis direction of the ZnO buffer layer such thatwhen the lattice constant in the a-axis direction of the semiconductor compound is smaller than the lattice constant in the a-axis direction of a ZnO single crystal, the lattice constant in the c-axis direction of the ZnO buffer layer is made larger than the lattice constant in the c-axis direction of the ZnO single crystal, andwhen the lattice constant in the a-axis direction of the semiconductor compound is larger than the lattice constant in the a-axis direction of a ZnO single crystal, the lattice constant in the c-axis direction of the ZnO buffer layer is made smaller than the lattice constant in the c-axis direction of the ZnO single crystal,whereby the lattice constant in the a-axis direction of the ZnO buffer layer is made nearly equal to the lattice constant in the a-axis direction of the semiconductor compound.