Gideon Analytical Laboratories received a Unity PLCC LED and was asked to perform FTIR analysis for the purpose of materials compatibility. Fourier transform infrared spectroscopy (FTIR) is a process used to acquire an infrared spectrum of absorption, emission, or photoconductivity of some substance. It can work with solids, liquids, or gasses, and can reveal the chemical composition of numerous materials. Gideon Analytical Laboratories was asked specifically to utilize FTIR on two substances: a white encapsulate and a clear/colorless material.
Gideon Analytical Laboratories received several VCSELs (vertical cavity surface emitting laser" with diminished light capacity over time for failure analysis. VCSELs are a type of semiconductor laser diode with laser beam emission perpendicular from the chip surface. The VCSEL has become of great importance in the optical communications field. Gideon Analytical Laboratories was tasked to diagnose the failing VCSELs.
Failure analysis commenced. The devices were tested on a curve tracer to determine whether any junction problems (junction inversion, leakage current, facet oxidation, etc.