An image forming device for printing print data received from a terminal device through a communication network; the image forming device including an acquiring unit, a storing unit, a determining unit, and a print control unit. The curved segment is smoothed so as to reduce the noise that is associated with the curved segment, thereby providing a smoothed segment. The selected categories are associated with one of data class of business use, private use, and the like. The Gatekeeper formats a message to an authentication server that will authenticate the information contained in the token, and the server responds with either an Access-Accept or Access-Reject message. A metal support structure is then formed on the semiconductor layers and the insulating substrate is removed.