Lead frame

Details Lead frame Lead frame

1993-04-12

1994-04-19

Hille, Rolf

Active solid-state devices (e.g., transistors, solid-state diode

Lead frame

With dam or vent for encapsulant

257670, 257666, H01L 2348, H01L 2944, H01L 2952, H01L 2960

Patent

active

053048415

ABSTRACT:
A lead frame for a rectangular flat package has dumb bars connecting the lead terminals and dam bar coupling portions at the corners of the frame in which the coupling portions are notched to permit the adjacent dam bars to have the same length as the other dam bars, permitting them to be cut away by the same punch. This arrangement permits an increase in the length of the nicked part of the corner of the resin body of the flat package, at which a gate for injection-molding of a resin is located, thereby avoiding chipping of the resin body when excess resin from the injection is removed.

REFERENCES:
patent: 4301464 (1981-11-01), Otsuki et al.

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