CHAPTER 3 SOLDERING CONDITIONS
3.1 Solderability
3.1.5 Solderability following long-term storage
| The results of solderability tests performed after storing devices in different storage environments are shown below. These results indicate that under various storage conditions, satisfactory solder wettability, with the zero-cross time remains almost unchanged even after two years. |
Table 3-1-2. Meniscograph Testing Conditions
| Flux |
Rosin - R Type |
| Sample |
100 pin QFP(42 alloy) |
| Testing temperature |
210 ±3°C |
| Dipping speed |
25 mm/s |
| Dipping depth |
1.0 mm |
| Dipping time |
5 s |
| Dipping lead count |
20 |
| Sample count |
20 |
| Storage conditions |
25 ±5°C, 25 to 80%RH |
 |
| Figure 3-1-7. Results of Wetting Balance Test |
