| 摘要 |
PROBLEM TO BE SOLVED: To provide a lead frame for LED having a high reflectance of light of short wavelength (460 nm or less) in which the reflectance does not decrease like a peak near a wavelength of 350 nm in a spectral reflectance curve, and to provide a semiconductor device using the same.SOLUTION: A lead frame 1A for LED used for mounting an LED element 12 having an emission wavelength of 460 nm or less includes a substrate 2, and a silver plating layer 3 provided at least on a mounting region MA of the substrate 2 for mounting the LED element 12. Crystal particles of silver having a cross sectional area of 1 μmor more occupy 70% or more of the total area of a predetermined cross section in the thickness direction of the silver plating layer 3. In the spectral reflectance curve of the silver plating layer 3, reflectance near a wavelength of 350 nm does not decrease like a peak. |
