A metallised thin film capacitor consists of thin layers of metalsuch as aluminium with polymer dielectric in between. When the capacitor is fully chargedthe electromagnetic fields can be considered to have reached a steady state in which the governing equation is Laplace's equation. It is the computational alaysis of the electrostatic state that is considered in this paper.

The capacitor is modelled as a stack made up of infinitessinmally thin layers of metal in ppolymer. An integral equation method, smilar to the boundary element method is developed for modelling the electric field. The method is applied to a typical capacitor structure and encouraging results are obtained.