Advanced modelling technique for microscale heat transfer analysis : Application to the flexible printed circuit microconnectors
V. Gatto, Y. Scudeller, O. Lottin
Laboratoire de Thermocinétique de L'Ecole Polytechnique de Nantes., FR
Keywords: Compact model, thermal modelling, microconnectors.
The paper presents an advanced modelling technique of 3D multi-scale heat conduction problem for the thermal analysis of microsystems and especially flexible printed circuit microconnectors (FPC). Nowadays, more and more applications in automotive and aerospace require interconnect systems of high density working in harsh environment. These systems have to be able to supply many input/output signals and high current levels. In the future, miniaturisation and increase of power densities pose crucial thermal questions for the next generation of interconnect systems such as FPC. Designed originally to replace wiring harnesses, FPC microconnectors are basically composed of thin copper lines of various shapes and sizes, forming a complex circuit pattern integrated in an insulating polymer films.
The technique is based on an original approach consisting to transform the 3D heat conduction problem in the combination of two heat conduction problems, basically 1D and 2D. Results are in very good accord with 3D Finite Element model. Experiments have been set up to validate also the thermal model.. The experimental and calculated temperatures are in good accordance and does not exceed 3 % for the hot spot at the middle of the FPC.
NSTI Nanotech 2003 Conference Technical Program Abstract