Method of manufacturing an electrode substrate for a fuel cell unit and thus produced substrate

Production of a substrate (121) for an electrode (122) of a fuel cell unit comprises soldering the electrically conducting element of the fuel cell unit at a contact site (296') with the electrically conducting element of the substrate. Independent claims are also included for the following: (1) a substrate for an electrode of a fuel cell unit; (2) a fuel cell unit comprising at least one substrate and an electrode connected to the substrate; and (3) a fuel cell block composite comprising a number of fuel cell units.