A motor driving apparatus has a driver circuit configuration capable of individually adjusting three phase coil currents. When the cover plate blocks the IR signals, the 1st infrared receiver will generate a control signal out to an activating circuitry, an ultraviolet lamp installed on the inner top of the C-shaped body and connected to the activating circuitry. The rear trim is to be arranged closer to a rear side of the vehicle. Applicants have found the method particularly useful in processing structures such as DRAM stacks, especially where the residue is formed by a trench etched in the previous silicon substrate and the exposed layer etched from the present substrate is silicon nitride.