A method which permits self-synchronization of elements to be synchronized. Inverter includes an upper transistor, a lower transistor, and a driver circuit. The invention makes it possible to predict and identify a target fragment gene rapidly, whereby the gene analysis efficiency is markedly improved. The folding apparatus includes a hold-down member adapted to contact a center section of each pad extending generally parallel to said major axis as the pad is conveyed forward. A sheet of the paperboard with the poly extruded decorative paper is cut into plies. Therefore, in an underfill process of adhesive bonding the base 2 to the bare chip 3 placed on the upper part thereof and sealing a gap between both of them with the adhesive 10 during manufacturing semiconductor electronic parts, the adhesive 10 is prevented from flowing out of the outside edge of the bare chip 3 and from depositing on the electrode pads 7 formed on the base 2.