Patent ID: 6195166
Filing Date: 2001-02-27
Classification: G01N

Abstract:
A method of obtaining physical characteristic data related to a III-V optoelectronic device, the method comprising the steps of:a) providing a III-V optoelectronic device, said device including a substrate and a plurality of separate layers, said separate layers being one of n-doped, p-doped and undoped;b) providing a monochromatic light source having a predetermined small spot size of approximately 10 micrometers or less;c) illuminating a first area of said III-V optoelectronic device of step a) with the small spot size monochromatic light source provided in step b);d) recording reflected wavelength information from the illumination of step c);e) repeating steps c) and d) along said device so as to collect micro-phtoreflectance information across the plurality of separate layers of said III-V optoelectronic device; andf) analyzing the micro-photoreflectance data recorded in step d) to obtain information related to the physical characteristics of said III-V optoelectronic device.