Process for making electrical connections between two surfaces of a printed circuit board

Process for making electrical connections between an upper surface and a lower surface connected by side surfaces of a printed circuit board having edges, the process comprising the steps of:

• providing an elastically deformable printing stamp having a portion capable of embracing an edge of the printed circuit board in a direct contact with the upper surface, the lower surface and a side surface connecting the upper and lower surfaces in the region of an edge;
• providing an electrically conductive coating material on said embracing portion of said printing stamp;
• and directly contacting said embracing portion with the upper surface, the lower surface and a side surface connecting the upper and lower surfaces in the region at least one of the edges of the circuit board so as to cause printing of the electrically conductive coating in selected positions on of said upper, lower and side surfaces in the region of at least one of the edges of the circuit board so as to connect electrically said upper and lower surfaces of the printed circuit board.