A thermoplastic resin-coated aluminum plate is provided which is less liable to develop ply separation or cracks in a resin coating film during drawing or ironing and on which the resin coating film is less likely to peel off the aluminum plate. Thereafter, a metal film 7 for source and drain electrodes is formed by sputtering. In another embodiment, the metal line is relatively thick. The second insulating layer covers the active layer and the etching stop layer and has a first opening and a second opening exposing the active layer and a third opening exposing the etching stop layer. The second elastic part is provided on an inner diameter side of the non-sheet passing part. An outside roller may be configured to contact an outer surface of the belt and to be driven by a second motor; a controller configured to control the second motor by a less loop gain than a loop gain to control the first motor.