Abstract
In order to establish measurement method of effective thermal conductivity of specimens such as isotropic electrically conductive adhesives for use electronic equipment, steady state comparative-longitudinal heat flow method using cartridge type specimens have been developed. This method needs long time to get some temperature dependent thermal conductivities by waiting several times to get some steady state conditions. We have studied an improved method nnamed quasi-steady state comparative longitudinal heat flow method in which temperature dependency of the thermal conductivity can be obtained by only one time heating. We demonstrated the possibility to obtain the temperature dependency of the thermal conductivity of the specimen by numerical simulation using two-dimensional transient heat conduction model. The error of the thermal conductivity obtained by this quasi-steady method using quasi-steady condition was less than 2%.
