abstract |
(57) [Summary] [PROBLEMS] To provide a low-cost, high-coupling lead frame. A lead frame used in an integrated circuit chip assembly has a base metal structure having a nickel adhesive layer covering a base metal, a palladium adhesive coating on the nickel layer, and a palladium coating on the base metal structure. An adhesive layer of palladium, which selectively covers areas of the leadframe suitable for bonding wire and solder mounting. |