Thermal parameters measurement method of electronics materials

The fast and precise photoacoustic methods of determination of all thermal parameters and additionally the optical absorption coefficient in the case of nonopaque solid state materials used in the electronic industry are presented. The procedures that allow one to determine the thermal diffusivity, thermal effusivity, thermal conductivity and specific heat of any material are presented. Both methods (for opaque and nonopaque material) are based on a comparison of thermal impedance frequency phase and amplitude characteristics of the samples with pattern characteristics. In the case of opaque materials they are the functions of thermal material parameters and the frequency of modulation. For nonopaque materials pattern characteristics are functions of universal and absolute arguments. Experimental results illustrating the procedures are presented and discussed for the following materials: silicon, copper, brass, and epoxy molding compound Hysol MG-40F-R.