Patent ID: 6413791
Filing Date: 2002-07-02
Classification: H01L,H01S

Abstract:
A method of manufacturing an epitaxial wafer comprising the steps of:providing one or more nondoped compound semiconductor polycrystalline materials having an oxygen concentration less than or equal to 1Ã—1016 cmâˆ’3; sequentially forming by liquid-phase epitaxial growth a first compound semiconductor clad layer of a first conductivity type, a compound semiconductor active layer of the first conductivity type, and a second compound semiconductor clad layer of a second conductivity type on a compound semiconductor substrate of the first conductivity type, said one or more nondoped compound semiconductor polycrystalline materials being used as original material for the liquid-phase epitaxial growth; and causing during fabrication each of an interface between the first clad layer and the active layer and an interface between said active layer and the second clad layer to be less than or equal to 1Ã—1017 cmâˆ’3 in oxygen concentration, wherein, after liquid-phase epitaxial growth, said substrate is removed away forming a rear-surface reflection structure epitaxial wafer.