Flat panel liquid-crystal displays, such as for laptop computers. The upper surface of the a-Si film or the lower surface of the glass substrate is irradiated and scanned with an energy beam output continuously along the time axis from a CW laser in a direction indicated by an arrow, thereby crystallizing the a-Si film. For example, when two services \u201cread\u201d and \u201creadwrite\u201d can be started corresponding to a service memory field, two PIN codes are set.