On the basis of a high degree of theory, prime numbers are derived through effective processing and steps so as to achieve a remarkable reduction in the processing time taken for the derivation. A feed coupler is connected to a terminal 50, the driven gear 72 is rotated and adjusted to a predetermined sensor voltage value. Most preferably, the dispersion value at the minimum is more negative than \u2212400 psnmkm and greater than \u22121200 psnmkm at 1550 nm. The high-voltage switching device is used particularly advantageously in a second installation position and has a second particle trap, with the second particle trap arranged vertically underneath the switching gap in the second installation position. The breakdown of the IGBT is further effectively prevented by forming a guard ring for suppressing electric field concentration around the region having the low breakdown voltage. The invention further relates to a process for the production of the film and to its use.