MOLDING METHOD AND APPARATUS

摘要

PROBLEM TO BE SOLVED: To equally inject a resin into respective cavities by forming an auxiliary runner allowing mutually adjacent culls to communicate with each other so that the cross-sectional area thereof is larger than that of a main runner allowing the culls to communicate with the cavities. SOLUTION: After respective cavities 23 are filled with a liquid resin 31, the resin 31 is thermally cured to form a resin seal element. Upper and lower molds 21, 22 are opened and the resin seal element is released by an ejector pin. The work 1 having the resin seal element formed thereto is demolded from a transfer molding apparatus 20 by a handier. Tabs 3, pellets 4, inner leads 5a and bonding wires 6 become a resin sealed state within the molded resin seal element. A transfer molded object is molded from the transfer molding apparatus 20 and a runner part is separated from a multiple lead frame 2 having the resin seal element formed thereto by a molded product separator.