The present invention relates to a scanning apparatus capable engaging an automatic document feeder. In an exemplary method, a formable material is mixed with a blowing agent to form a foam material. The tool bit performs a predetermined operation by reciprocating. The edge of the first insulating layer pattern is protruded from the edge of the second insulating layer pattern to be covered with the silicon epitaxial layer whose predetermined region is silicided. The tool is adjustable to disconnect the feed runner from one flowing material characterization channel and connect it to different flowing material characterization channels. The method and apparatus provided by the embodiments of the invention allow up to a maximum number of codewords to be generated given the code alphabet size.