A contact switching arrangement with a flat electrically non-conducting cover which forms a switching area on a top facing the user, and has an underside facing away from the user, at which at least one electrode is arranged and is connected with a switching arrangement for triggering a contact signal when a finger of the user or a similar conducting body approaches. The connecting device has a housing arrangement which forms an outer conductor. A plurality of transmission gears are provided at a plurality of predetermined positions along the path of the planetary gear pivotally rotating, so as to engage with each of the planetary gears. A spacer layer is deposited over the first hard mask and extends into each trench to cover exposed portions of the semiconductor substrate surface in each trench. The diameter of the pipe is then used to properly choose a liner assembly of the same diameter to repair the wall of the pipe.