Method of manufacturing cooling devices made up of several metal shaped-section elements for mounting on semiconductor components, shaped-section elements for use in the manufacture of such cooling devices, and cooling devices manufactured by the method

A part section for producing cooling elements comprising:

• a first wall element having an inner and outer surface;
• a second wall element having an inner and outer surface and being molded perpendicularly to the inner surface of the first wall element at one end forming an L-shaped cross section;
• a plurality of cooling ribs molded perpendicularly onto the inner surface of the first wall, and said ribs extending parallel to each other and parallel to the second wall element;
• a bridge strip molded to an outer surface of the second wall element and molded onto the inner surface of the first wall element;
• and
• a groove formed by said bridge strip, wherein when connected to another part section said groove engages with a corresponding, bridge strip on the other part section by a plastic deformation step.