One aspect of the present subject matter relates to a method for forming a transistor. In one embodiment, the power converter includes a power switch and a magnetic device coupled to the power switch and having a non-uniform gap. Then, the method proceeds with a step of flipping the level gauge upside down on the table-top surface and measuring a tilt angle \u03b8R from the level gauge and an output voltage VR from the accelerometer for calculating a tilt angle \u03b81 of the table-top surface and the offset Voffset and sensitivity Vsensitivity of the accelerometer. Additional layers are formed of alternating film layers and nanoparticle layers.