Abstract
The wetting property and reflectivity of Sn-3.5Ag solder which was dip coated on a LED lead frame were investigated. The wettability of molten solder on Cu substrate was evaluated by the wetting balance tester, and surface tension was calculated from maximum withdrawal force and withdrawal time. Temperature of the molten solder in a bath was varied in the range of 250-290°C. With increasing temperature, the surface tension decreased a little. The reflectivity of Sn-3.5Ag coated on a substrate became a little lower than the highest current LED lead frame reflectivity.
| Original language | English |
|---|---|
| Pages (from-to) | 563-568 |
| Number of pages | 6 |
| Journal | Journal of Korean Institute of Metals and Materials |
| Volume | 50 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2012 |
Keywords
- Alloys
- Reflectivity
- Soldering
- Surface roughness
- Wetting