In one embodiment, a first wiring line is pulled out from an active area, and a short ring circuit is provided in a peripheral portion of the active area. A plurality of frame patterns is defined in the central unit, with each frame pattern being appropriate to one of the communication modes. The plate 11 is provided with an opening 12 in association with the protrusion 10 and is positioned by fitting the protrusion 10 into the opening 12 when attached. Next, a laser 370 to 650 nm in wavelength is used to irradiate the above crystalline semiconductor film by again processing the laser beam into a linear beam through an optical system. The access node authenticates the login information and removes the restricted access such that the communication network can be accessed by the user terminal.