An experimental study of thermal resistance of a power semiconductor package

Abstract

An experimental method for measuring packaging material characteristic parameters and the package thermal resistance including the contact resistance is discussed. The physical model based on one-dimensional analysis and the quasi-steady conduction process are developed. A continuous laser beam with uniform intensity is used as a heat source. The thermal diffusivity of beryllia ceramics and the package thermal resistance have been measured. The results can be applied to check the package manufacturing quality.<>