A method and structure to reduce electromigration failure of semiconductor interconnects. A voltage signal is generated that is proportional to the phase difference between two input signals. A portion of the isolation structure is removed to form a recess. In the apparatus, the illumination arrangement generates at least a subset of the radiation paths by sweeping at least one beam of radiation along the touch surface. One and the same application functions in different models of mobile terminals without matching, and in a certain mobile terminal all applications can be run, which applications use specified interface commands.