| 摘要 |
A method of producing semiconductor packages includes the step of punching out a dam-bar and part of the region lateral to a lead of a scaling body formed by molding, the punching-out being effected by using a support block and a punch. The support block has an outer lateral surface in a region receding as much as possible from the lateral surface of the upper portion of the seal body and also has an inner lateral surface almost flush with the lateral surface of the lower portion of the seal body. The width (Wa) of the upper surface of the support block is smaller than the overhang quantity of the upper portion of the seal body. In the region lateral to the lead, the front end region (Ra) positioned immediately below the overhang section of the upper portion of the seal body has an inclined surface (Fa 1 ) sloping inwardly downward.
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