Product Features
1、High environmental protection level
Selective etching can be achieved without the use of alcohol products such as IPA.
2、Low production cost
The addition amount is low, the texturing time only takes 6 to 8 minutes, and the cost is much lower than the IPA texturing process.
3、Significantly efficiency improvement
Compared with the IPA texturing process, the texture uniformity and reflectivity are better.
4、No initial polishing process
The cost is greatly reduced, and the additive itself is more environmentally friendly.
Technical Parameters
|
Compositions |
Contents |
CAS No. |
EC No. |
|
Pure water |
95 - 97 % |
7732-18-5 |
231-791-2 |
|
Sodium lactate |
2 – 2.5 % |
532-32-1 |
220-772-0 |
|
Sodium epoxysuccinate |
1-1 . 5 % |
51274-37-4 |
/ |
|
Surfactant |
0 . 01 - 0 . 05 % |
/ |
/ |
|
Preservative acid |
0 . 1 % - 0 . 2 % |
137-40-6 |
205-290-4 |
Application Range
This product is generally suitable for Perc, Topcon and HJT battery processes
Suitable for single crystals of 210, 186, 166, and 158 specifications
Physical Features
|
No. |
Item |
Main parameters and project indicators |
|
1 |
Color, shape |
Dark brown liquid |
|
2 |
PH value |
13-14 |
|
3 |
density |
1.1-1.9g/ml |
|
4 |
Storage conditions |
Store at room temperature away from light |
Instructions
1、Add an appropriate amount of alkali (1.5 - 2.5% based on the volume ratio of KOH (48%)) into the tank.
2、Add an appropriate amount of this product (0.5 - 0.8% by volume) into the tank.
3、Warm the texturing tank liquid to 80℃+4.
4、Put the silicon wafer into the texturing tank, and the reaction time is 400s-500s.
5、Recommended weight loss for a single film: 0.45 + - 0.06 g (210 film sources, other film sources are converted in equal proportions).
Use Case
Taking Jiejia Veichuang trough-type texturing equipment as an example, the non-primary polishing process is used
|
Process tank |
Pure water |
Alkali (45%KOH) |
Addition（JUNHE®2550） |
Time |
Temperature |
Weight lose |
|
|
Texturing |
First liquid dispensing |
437.5L |
6 L |
2.5 L |
420second |
82℃ |
0.47±0.03gram |
|
Liquid infusion |
9L |
500 ML |
180 ML |
Precautions
1、Additives need to be stored strictly away from light.
2、When the production line is not producing, the fluid should be replenished and drained every 30 minutes. If there is no production for more than 2 hours, it is recommended to drain and refill the fluid.
3、New line debugging requires process matching according to each process of the production line to maximize efficiency. The recommended process can be referred to debugging.
