A series of semiconductor devices includes: (i) a plurality of semiconductor elements having electrodes; (ii) a plurality of electrically conductive parts formed around and electrically connected to each of the semiconductor elements; and (iii) a sealing resin in which the plurality of semiconductor elements and the plurality of electrically conductive parts are sealed and an electrode-free side of each semiconductor element and an unwired side of each electrically conductive part are formed on a single flat surface of a removable substrate.