| 摘要 |
PURPOSE:To prevent formation of resin at the tip part of a lead frame from a groove, by forming at least one groove parallel to and neighboring the outer peripheral side of a cavity in which resin is injected on the surface of a metal mold. CONSTITUTION:In a metal mold 1, a groove 8 is arranged at the part against which a lead frame 3 abuts. When a resin thin film begin to be formed on the boudary surface between the metal mold 1 clamping the lead frame 3 and a surface 6, the groove 8 is filled with resin 5, and the thin film is interrupted at a position of the groove 8. As the result, unnecessary resin burr can be prevented from generating on the lead frame. |
