A method for producing an electrode pattern in a conductive polymer disposed
on
a substrate, the method comprising the steps of: applying a layer containing a
conductive polymer on a substrate; and printing a pattern on said layer using a
printing solution containing a conductivity enhancing agent such that the resistivity
of the areas that are contacted with the printing solution decreases by at least
a factor of 10. A formulation and a thin film element for performing the method
are also disclosed.