Silver spot/palladium plate lead frame finish

Active solid-state devices (e.g. – transistors – solid-state diode – Lead frame – Of specified material other than copper

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Details

257762, 257666, H01L 2348, H01L 2350

Patent

active

055613209

ABSTRACT:
A lead frame is plated with palladium and then selected portions of the lead frame leads are spot plated with silver to improve solderability.

REFERENCES:
patent: Re34227 (1993-04-01), Asher et al.
patent: 4800178 (1989-01-01), Mathew et al.
patent: 4968397 (1990-11-01), Asher et al.
patent: 5138431 (1992-08-01), Huang et al.
patent: 5146312 (1992-09-01), Lim
patent: 5362370 (1994-11-01), van der Heijden
patent: 5384204 (1995-01-01), Yumoto et al.

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