Therefore, according to this embodiment, the limitation for various kinds of equipment to be used in the assembling steps shown in FIGS. 2(a) to 2(d) can be minimized and hence a cost rise can be efficiently reduced. [0055] In the case of this embodiment, it is possible to locate the bending position of the lead frame 13 at an arbitrary position in the portion 130 and, therefore, the lead frame 13