| 摘要 |
PURPOSE:To prevent a void from being produced and a die pad from being deformed by a method wherein, when a pellet is molded to the die pad where the pellet is mounted, an opening part which is stretched along a flowing direction of a resin to be injected into a cavity from a gate of a metal mold is made. CONSTITUTION:An opening part 11a is made and formed in a die pad 3 of a lead frame 1a; the die pad 3 is divided into two parts by the opening part 11a. This opening part 11a is stretched along a direction in which a resin to be injected into a cavity K from a gate G flows during a process to form a molding part 9; a flow route of the resin flowing under a pellet 2 is secured. Accordingly, a flowing property of the resin flowing under the pellet 2 is enhanced; a gap between the rear surface of the pellet 2 exposed from the opening part and a lower metal mold can be made nearly equal to a gap between the surface of the pellet 2 and an upper metal mold. Thereby, it is possible to effectively prevent a void from being produced and the die pad from being deformed. |
