HJT Main grid silver (copper) paste SF-3000A series

Name: HJT Main grid silver (copper) paste SF-3000A series
Brand: Dongguan City Betterly New Materials Co., Ltd.
Price: 100 USD

The SF-3000A series is a curable polymer conductive paste designed for printing the main grid of N-type silicon heterojunction cells. It exhibits excellent bulk resistivity and contact resistivity on TCO cells, along with high solder pull strength, fine printing characteristics, and low silver consumption.

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Category: Conductive Silver Paste

Product Features Performance Parameters Storage & Shelf life Package Notes

Product Features Of HJT Main grid silver (copper) paste SF-3000A series
- High-definition printing, defect-free printing with openings≤30μm.
- Excellent adhesion and soldering performance.
- Low-temperature soldering performance and low resistivity.
- Contact resistance stability

Performance Parameters Of HJT Main grid silver (copper) paste SF-3000A series

Item	SF-3000A	SF-3000A-AC	SF-3000A-AC	SF-3000A-AC	Test method
Solid content（Wt%）	96±2	96±2	96±2	96±2	GB/T1725-79， 200℃ , 30min
Silver content （Wt%）	93%	40-50%	35%	30%	According to the formula quantity
FOG (µm) 4th scratch 50%	7 ≤3	7 ≤4	7 ≤4	7 ≤4	GB/T17473.2-20 08
Viscosity（Pa.S）	90-120	100-120	100-120	100-120	Brookfield DV- Ⅱ , 25℃ , S14， 35rpm
Resistivity ( Ω ·cm）	<7.0*10-6	<7.5*10-6	<7.5*10-6	<7.5*10-6	GB/T17473.3-20 08
Pat Point pull-out force（N）	≥1.5N	≥1.5N	≥1.5N	≥1.5N	180 °Pull-out， 200mm/min， 320℃ Welding

Recommended screen printing and curing parameters：

Item	Index
Screen parameters and opening	360-16 or 430-13 （50-80）um Opening, with/without mesh knot
EOM thickness	12-20um
Printing speed	300-400mm/s
Curing Parameters	180~220℃ 8~30min

Storage & Shelf life Of HJT Main grid silver (copper) paste SF-3000A series

Paste must be sealed in a cool, dry and well-ventilated place, with a storage temperature of -20 to 0℃.
The shelf life of the product is 6 months.
Package Of HJT Main grid silver (copper) paste SF-3000A series

2Kg/drum
Notes Of HJT Main grid silver (copper) paste SF-3000A series

1. Stir thoroughly before printing and allow to rest briefly before use,and ensure the screen is clean and dry.
2. It is recommended to maintain an ambient temperature of 20~25℃ and humidity ≤60% during use.
3. The viscosity of the conductive silver paste has been adjusted. Do not add thinner when starting use. During continuous printing, add paste incrementally; do not add too much at once.
4. Once opened, silver paste must be used within 24 hours. Any unused silver paste must not be left uncovered; it must be stored with both inner and outer lids securely closed.
5. When using silver paste after removal from refrigerated storage, first allow the paste to equilibrate at operating temperature (typically 20℃~25℃) for ≥6h. Critical note: Do not open the silver paste container during equilibration; maintain the container in a sealed state. After temperature equilibration is complete, open the lid and stir thoroughly.
6. The operating environment should not contain corrosive gases such as sulfides or chlorides.
7. Workers must wear masks, hats, gloves, and other protective gear. Do not use personal protective equipment containing sulfides；
8. If it comes into contact with the skin, wash it immediately with water and soap.