Method for permanent connection of two metal surfaces

The invention relates to a process for the production of a permanent, electrically conductive connection between a first metal surface of a first substrate and a second metal surface of a second substrate with the following method steps, in particular the course of the method: Conditioning of the first and second metal surfaces in such a way that in a connection of the metal surfaces, in particular in a time period of a few minutes after the conditioning, a permanent, electrically conductive connection-produced at least primarily by substitution diffusion between in particular similar, preferably identical, metal ions and/or metal atoms of the two metal surfaces-can be produced, Orientation and connection of the first and second metal surfaces, whereby during the conditioning, orientation and connection, a process temperature of at most 300 DEG C, in particular at most 260 DEG C, preferably 230 DEG C, even more preferably 200 DEG C, especially preferably at most 180 DEG C, and ideally at most 160 DEG C, is not exceeded.