A semiconductor device is provided which avoids lowering of the sense speeds of plural sense amplifiers due to their drives. To this end, the sample is irradiated in an interferometer, with the light of a radiation source. Otherwise, the touch events can be processed by an application. A through hole corresponding to the jack is formed in the baffle plate. In doing so, the system avoids traversing a large number of RC objects which are infrequently modified. The technique includes sweeping an evaluation line across at least a portion of the drawing, detecting on the evaluation line an endpoint of a first segment, determining a distance from the endpoint to a point on the second segment, comparing the distance to a maximum gap distance, and detecting a gap.