| abstract |
A lead frame for an optical semiconductor device, having: a layer 2 composed of silver or a silver alloy formed on an electrically-conductive substrate 1 ; a metal oxide layer 3 of a metal other than silver as an outer layer of the layer composed of silver or a silver alloy, wherein the metal oxide layer 3 is colorless and transparent or silver gray in color, and has a thickness thereof from 0.001 to 0.2 μm; a method of producing the same; and an optical semiconductor device utilizing the same. |