A description is given of a ski sledge having a swiveling front ski with steering means, two essentially mutually parallel rear skis and a seat connected via one or more rods to the steering means, where the rear skis are connected to the sledge by means of a parallelogram arrangement. The fabrication process includes fabrications of an LED micro-array and an AM panel, and combining the resulting LED micro-array and AM panel using the flip-chip technology. 1 bar acting at least in a region of the anode to be cooled. A joint assembly having a constant velocity joint and a sealing element is also disclosed.