Copper alloy strips for a leadframe of a LED

There is a lead frame, which is made of a copper alloy strip on Cu-Fe-base, provided to improve the heat dissipation in the LED package. A reflective Ag-plating film which is formed on the lead frame, increases the brightness of the LED package. In the copper alloy strip Cu-Fe-basis of the arithmetic average roughness Ra is 0.2 microns or less, the ten-point mean roughness Rz The copper alloy strip Cu-Fe-base contains 1.8 to 2.6 mass% of Fe, 0.005 to 0.20 mass% and P 0.01 to 0.50 mass% of Zn or contains from 0.01 to 0 5 mass% of Fe, 0.01 to 0.20 mass% of P, 0.01 to 1.0 mass% Zn and 0.01 to 0.15% by mass of Sn.