A controller for a power converter includes a first amplification stage and a second amplification stage coupled to the first amplification stage. One of the contact members at each breaking point is movable. The composition is suitable for use in coatings and castings. A metric characterizes quality of service for each component. In comparison with the conventional techniques, manufacturing of the present invention is simplified and economic in reducing working hours, size and cost of production and the wafer is not subjected to breaking during manufacturing.