MANUFACTURING OR REGENERATION METHOD

It is an object to perform at least one of writing information to, deleting information from, and updating information in a storage medium in a state where a portion of an electrical contact surfaces in a first direction crossing the electrical contact surfaces is stabilized when a holder holding the electrical contact surfaces is capable of expanding and contracting in the first direction.A holder 52 includes: a first outer surface 52A; a second outer surface 52B; and a coil spring 52 as an elastic member. An electrical contact surface 511 of an IC chip 51 is held by the first outer surface. When an assembly is produced or reproduced, first the coil spring 523 is compressed in the first direction. Hence a distance in the first direction between the first outer surface 52A and the second outer surface 52B is reduced to a prescribed distance shorter than a first distance. Then, a probe 60 is brought into contact with the electrical contact surface 511 in a state where the distance in the first direction between the first outer surface 52A and the second outer surface 52B is maintained at the prescribed distance. In this way, at least one of writing information to, deleting information from, and updating information in the IC chip 51 is performed.