LEAD FRAME HAVING BUMPS THEREON AND MANUFACTURING METHOD THEREOF

摘要

The present invention relates to a clad sheet for lead frame which can manufacture economically and has excellent characteristics, lead frame using thereof and manufacturing method thereof. A clad sheet for lead frame is manufactured by press-bonding copper foil to nickel foil at the reduction rate of 0.1 to 3 %. Or, it is manufactured by press-bonding copper foil having nickel plating on one or both sides of it to the other copper foil at the reduction rate of 0.1 to 3 %. Or, it is manufactured by press-bonding aluminum foil to nickel foil at the reduction rate of 0.1 to 3 %. Further, it is also manufactured by press-bonding copper foil having nickel plating on one side of it to aluminum foil at the reduction rate of 0.1 to 3 %. Clad sheet is comprising three layer of copper/nickel/copper or copper/nickel/aluminum.