| 摘要 |
A lead frame is equipped between an upper die with which a gate port and an air vent part are not formed in a cavity part 12a and a lower die in which a gate port 15f is formed in one place of a corner of a cavity part 15a and an air vent part is not formed. After decompressing the inside of the die formed of the cavity parts 12a and 15a by clamping the upper die and the lower die with the clamp pressure of intermediate pressure, mold resin is allowed to flow in the die. Residual air is exhausted while allowing mold resin to flow in the die formed of the cavity parts 12a and 15a by once clamping the upper die and the lower die with low-pressure clamp pressure. Then, the mold resin which filled up in the die formed of the cavity parts 12a and 15a is formed by clamping the upper die and the lower die with high-pressure clamp pressure. |
