A composite assembly for processing or treating a plurality of printed circuit boards, including at least one frame or carrier element and a plurality of printed circuit boards of different sizes and thicknesses and different structures coupled therewith, said composite assembly, in the coupled state of the printed circuit boards, together with the at least one frame or carrier element being capable of being fed to the processing or treating of the printed circuit boards, wherein the printed circuit boards are coupled to the at least one frame or carrier element to form said composite assembly, wherein the printed circuit boards which, after processing, will be assigned to a common structural unit, or integrated or arranged in a common structural unit, are connected or coupled to the at least one frame or carrier element;
- wherein the frame or carrier element has a linear outer peripheral edge facing away from the plurality of printed circuit boards and has an inner peripheral edge facing the plurality of printed circuit boards;
- wherein the inner peripheral edge has contoured configuration corresponds to different sizes and dimension of the plurality of printed circuit boards for coupling the plurality of printed circuit boards.