There is provided a method of removing trap levels and defects, which are caused by stress, from a single crystal silicon thin film formed by an SOI technique. The armature comprises a plurality of teeth on the outer circumferential surface. Thus, the broadcasting stream can be stored in real time while viewing the broadcasting program and the stored broadcasting stream can be easily searched for or reproduced. The closure is axially movable in relation to the core member. The promotional identification or promotion information based on the promotional identification, is provided to the predefined location.