| 摘要 |
PURPOSE:To reduce a production cost by forming a device having an auxiliary resin unit different from the resin unit of a package body on the side of a heat sink, thereby enabling to eliminate the step of removing burr of inefficient workability. CONSTITUTION:A lead frame 2 is mounted in a transfer molding die to resin- seal it, and the die which has a recess at the position corresponding to the side of a heat sink 3 of a cavity is used as a die. In the molding step, resin is filled from a gap between a die at the contact 11 between the resin unit 1 and the auxiliary resin unit 10, and the sink 3 in a recess for the unit 10 of the die, and the unit 10 different from the unit 1 is formed at the exposed unit of the sink 3. After such a device is obtained, a frame such as an outer frame 2 unnecessary for the frame 21, a dam unit 22, and a connector 23 is cut off. A force is applied in a direction of an arrow 12 simultaneously upon the lead cutting step, and the unit 10 is hit off. |
