LED COPPER ALLOY STRIP FOR LEAD FRAME OF LED

摘要

present invention, Cu-Fe-based copper alloy plate consisting of a lead frame of the tank conductivity and to improve the thermal conductivity, improving the heat dissipation properties of the LED package, but also to improve the reflectivity of the Ag plating reflection film formed on the surface of the lead frame, thereby realizing a high luminance of the LED package. In Cu-Fe-based copper alloy sheet article, the surface roughness of the vertical rolling Ra: 0.2 or less, Rz _JIS : 1.2 below, R Z: 1.5 mu m or less and an average length in the rolling direction parallel The 2~100 , the average length of the vertical rolling 1~30 , rolling along the direction parallel to the maximum depth is formed densely on the surface of recess 400 nm or less. Ra is the arithmetic average roughness, Rz _JIS is a ten-point average roughness, Rz is the maximum height of roughness. Cu-Fe-based copper alloy sheet, Joe Fe: 1.8~2.6 mass%, P: 0.005~0.20 weight%, Zn: 0.01~0.50 including mass% or Fe: amount of 0.01 to 0.5 mass%, P: 0.01~0.20% by weight , Zn: 0.01 to 1.0 mass%, Sn:. including 0.01 to 0.15 mass%, the balance being made up substantially of Cu and unavoidable impurities ;