Provided are a semiconductor device which can be manufactured at low cost and has a low on-resistance and a high withstand voltage, and its manufacturing method. Illustratively, the postal data is categorized into invariable postal data, e. The expected head movements also preferable include an added substantially random movement. This multi-ply product shows an excellent adhesion between the plies, even if the product carries a lotion. In each case the average time or frequency spacing between semblance peaks is preferably determined and used to adapt the smoothing operation in a manner that varies with the slowness value s.