| 摘要 |
<p>PURPOSE:To improve productivity and solderability in a lead frame supported in cooperation of leads with an outer frame by so forming burrs formed by pressing at a lead group region as to be directed toward opposite side to a land contact face of the lead. CONSTITUTION:When a multi-lead frame 1 is so arranged that the main face of a film 10 is directed upward, burrs 11 of outer frames 3, 3 are directed upward, and burrs 11 of a lead group region A are directed downward. Since a recess 15 is so submerged at the center of a feeder 14, i.e., at a region opposite to the region A as to escape the burrs 11 protruded downward, the frame 1 is slidably contacted with the surface of the feeder 14 at the frames 3, 3 at both ends. Since the burrs 11 of the frame 3 are directed upward, the burrs 11 are not engaged with the surface of the feeder 14. Accordingly, an accident of improperly bending the leads or stopping a conveyance of a feeder can be avoided in advance.</p> |
