A diesel engine equipped with an exhaust gas particulate filter includes a control system that reduces exhaust gas smoke emissions normally resulting from an extended period of engine idling. A toothed ratchet wheel is rotationally coupled to the belt reel and cooperating with a blocking pawl secured to the housing. A second recessing is performed to recess the isolation regions to extend the semiconductor fin downwardly, with an inter-diffusion region of the first semiconductor strip and the second semiconductor strip being exposed after the second recessing. Embodiments can utilize ablation devices in conjunction with RF andor ultrasonic sources.