Lead frame formed of a copper-zirconium alloy

Details Lead frame formed of a copper-zirconium alloy Lead frame formed of a copper-zirconium alloy

1991-12-20

1993-05-11

Hille, Rolf

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

Lead frame

Of specified material other than copper

257741, H01L 2354

Patent

active

052104419

ABSTRACT:
A lead frame comprising a copper alloy containing 0.1 to 1 % by weight of chromium, 0.01 to 0.5% by weight of zirconium and having partial discolored regions caused by unbalanced precipitation of the zirconium distributed thereon at a rate of 2 grains/100 cm.sup.2 or less. The lead frame is, for example, obtained by an alloy containing 0.005% by weight of sulphur or less. The lead frame has an high reliability, high yield of production and high electrical conductivity.

REFERENCES:
patent: 4589930 (1986-05-01), Kumaga
patent: 4640723 (1987-02-01), Sugai et al.
patent: 4755235 (1988-07-01), Matidori et al.

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