Lead frame for semiconductor device that prevents island torsion

Details Lead frame for semiconductor device that prevents island torsion Lead frame for semiconductor device that prevents island torsion

1991-04-16

1992-11-10

Hille, Rolf

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

Lead frame

With separate tie bar element or plural tie bars

257676, H01L 2348

Patent

active

051628953

ABSTRACT:
A lead frame for a semiconductor device having: first and second frame portions facing each other and spaced apart by a predetermined distance; an island (4) formed at a position sandwiched between the first and second frame portions for mounting a semiconductor chip; a pair of tie bars for integrally coupling the first frame portion and a side of the island facing the first frame portion, the pair of tie bars being formed with a predetermined space in the widthwise direction; and a pair of tie bars for integrally coupling the second frame portion and a side of the island facing the first frame portion, the pair of tie bars being formed with a predetermined space in the widthwise direction.

REFERENCES:
patent: 4482915 (1984-11-01), Nishikawa et al.
patent: 4706105 (1987-11-01), Masuda et al.
patent: 4801997 (1989-01-01), Ono et al.
patent: 4942454 (1990-07-01), Mori et al.

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