| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve adhesiveness of resin with improving luminous efficiency. <P>SOLUTION: A base plating coat 3 that does not contain a surface smoothing agent is formed on a lead frame 2, and a silver plating coat 4 formed by using low-cyanogen silver plating solution is formed on the surface of the foundation plating coat 3. Thereby, precipitation of silver is facilitated with remaining lustrous. Accordingly, adhesiveness of resin is improved with improving luminous efficiency. <P>COPYRIGHT: (C)2010,JPO&INPIT |
