Senju Ecosolder® paste M46-LS720HF is a Low Sliver lead-free & Halogen free solder paste which has been formulated as the coming generation of solder paste to save soldering cost strongly desired SMT market.
Sometimes both negative property of low silver solder such as deterioration of thermal fatigue property and rising of melting temperature have obstructed the introduction of low silver solder paste into SMT.
However, Ecosolder® paste M46-LS720HF conquered these obstructions with optimizing solder alloy composition, also can stand comparison with previous SAC305 (Senju M705) solder paste in all soldering ability by designing exclusive chemical flux.
- Cost saving
- Same Solderability & Quality as SAC305 solder paste.
- Same or more high reliability of solder joint as SAC305 solder paste.
- Reducible Head in Pillow, Tombstone problem.
- High yield in AOI, ICT process and Excellent Flux cosmetics after reflow.
| Solder alloy code | M46 | M705 |
|---|
| Alloy composition |
Sn-0.3Ag-0.7Cu-Bi-In-Sb |
Sn-3.0Ag-0.5Cu |
|---|
| Melting Temperature(°C) |
Solidus |
211 |
217 |
|---|
| Melting peak |
225 |
219 |
|---|
| Liquidus |
225 |
220 |
|---|
| Tensile strength (MPa) |
55.5 |
53.3 |
|---|
| Elongation (%) |
34 |
55 |
|---|
| CTE |
21.9 |
21.7 |
|---|
| Item | Recommended procedure | Remark |
|---|
| Storage |
6 month at refrigerated 0 ~ 10°C |
Without unsealing condition |
|---|
| Warm-up prior to use |
At least 1hour leaving at ambient working temp |
Do not use forced heating methods. Actual paste temp should be verified |
|---|
Capable storage period
at room temperature prior to use |
1 week |
Without unsealing condition |
|---|
| Stirring before processing |
Manual: 30 ~ 60sec
Automatic: 30~60sec* |
*Depend on stir rate of stirring machine (Caution against surplus stir) |
|---|
| Working environment |
Temperature: 22 ~ 28°C
Related humidity: 30 ~ 70%RH |
--- |
|---|
| Capable working time in continuous printing |
24 hours |
Do not mix worked paste with unused paste |
|---|
| Capable abandon time in printing process |
1 hour |
--- |
|---|
| Capable idle time before placement after print |
8 hours |
--- |
|---|
| Capable idle time before reflow after print |
8 hours |
--- |
|---|
| Re-storage of remaining paste in container (unused portion) |
0 ~ 10°C |
Allowed to re-storage 1time in validity with putting the lid on firmly. |
|---|
