A tandem axle trailer pin extracter apparatus is provided. In one embodiment, the system includes an accumulator that has a variable volume. The present CMP apparatus includes a polishing pad having an underside surface mechanically coupled to a substantially planar surface of a platen, an abrasive surface, and a measurement system. A through hole having an inner surface including a bottom surface comprised of the silicide regions is formed in the interlayer insulating film. The imaging apparatus has a pixel in which the contact hole portion is removed through a laser-beam irradiation so that the connection portion between the conversion element and a conductive layer, which serves as the source electrode or the drain electrode of the thin-film transistor, is discontinued.