| 摘要 |
PURPOSE:To simplify substantially the manufacturing process of a lead frame, by plating Ni and/or Cu onto belt-shaped base alloy material for a lead frame. CONSTITUTION:Since it may be satisfactory to plate only on one face of alloy- base belt material on account of the original purpose of an underlayer for Ag plating, it is not desirably considered to plate onto both faces because of material being wasted. However, since plating only onto one face of the alloy- base belt material requires to mask the other face, it may be rather desirable to plate onto both faces of the alloy-base belt material if the required material and labor are considered. The alloy-base belt material 1 is plated with Ni and/or Cu in this way, and then it is slit and divided in several strips of alloy belts 11-14. The alloy belt so produced is stamped or photo-etched to produce a lead frame 2. |
