The thermal analysis technique becomes one of key techniques of the realibility design of multichip module(MCM).Numerical simulation based on finite element method is an important tool in the thermal analysis of MCM.A three dimensional thermal model of a kind of MCM for special use was established with ANSYS to calculate the temperature distribution.The effect of free air convection,forced-air convection,free liquid convection,and forced liquid convection on temperature distribution and power dissipation of...