Method for the selective surface treatment of planar workpieces
The invention relates to a method for the selective surface treatment of a planar workpiece, whereby, on at least one of two metallic surface sides, two similar workpieces are detachably connected to eah other at least in a partial region, on teh first surface side thereof, such as to be sealed to the outside.
1 . A process for the selective surface treatment of a board-shaped component on at least one of two metallic surfaces, wherein at least two homogenous components are detachably connected with each other on their first surfaces at least in a partial section and sealed from the outside, and that in a treatment phase the selective surface treatment takes place by the connection of non-covered areas of the metallic surfaces.
2 . The process as claimed in claim 1 , wherein the selective surface treatment takes place by applying at least one metallic covering or one metallic layer.
3 . The process as claimed in claim 2 , wherein the selective surface treatment takes place by means of chemical and/or electrolytic plating of at least one metallic layer.
4 . The process as claimed in claim 1 , wherein the sealed and detachable connection of the components takes place in such a manner that each component is completely covered by the connection on one of its surfaces.
5 . The process as claimed in claim 1 , wherein the components are boards made of metal.
6 . The process as claimed in claim 1 , wherein the components are printed circuit boards or printed circuit board substrates with at least one insulating layer and one metallization on two outer surfaces.
7 . The process as claimed in claim 1 , wherein the components are ceramic-metal substrates.
8 . The process as claimed in claim 1 , wherein the components are DCB substrates, preferably DCB multiple substrates.
9 . The process as claimed in claim 1 , wherein for the detachable connection of the components a frame-like or plate-like connecting element is used, on which the components are held by means of a bonding and/or adhesive and sealing mass and/or by means of a vacuum.
10 . The process as claimed in claim 1 , further comprising a plurality of temporally successive phases of a selective treatment, whereby before each phase of the selective surface treatment the components are connected tightly with each other on their surfaces not to be treated.