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   Products Home >> Products >> 澶槼鑳介摱娴? >> Front Silver Paste FC399

Front Silver Paste FC399
1.Product Description

▶ High efficiency
▶ Fine grid line printing,high aspect ratio
▶ High solderability and high adhension
▶ Suitable for PERC and black silicon cells
▶ Suitable for knotless screen printing

2.Typical Characteristics

Product Properties

TestCondition

SPEC

Viscosity(Pa·S)

Brookfield,SC4-14/6R utility cup and spindle,at 10 rpm,25±1℃

50~400

Solid(%)

At 700℃,15min

91±2

Shelf life (month)

Unopened

6


3.Recommendations

3.1 Printing
Screen Parameters

Screen Parameter

Unit

Conventional Screen

Knotless Screen

Mesh count

count

360

380

430

290

325

Wire diameter

μm

16

14

13

20

16

Mesh opening

μm

28~32

25~28

Emulsion thickness

μm

10~16


The above parameters are for reference only, the final results of the customers’ debugging shall prevail.

3.2 Drying
Infrared heat, 120~350℃, 1min, or optimized by customers.

3.3 Firing
This product has a wide range of firing temperature. The peak temperature is 10-40 degree lower than conventional , when used in PERC cells. Customers can optimize the sintering process. The following sintering process for customers’ reference, the temperature in the diagram is the actual temperature of the silicon wafer.


3.4  Welding
Welding technique: manual or automatic welding
Coating of welding strip : Sn-Pb or Sn-Pb-Ag

3.5  Paste Preparation
Stirring:The silver paste should be thoroughly mixed before use. It needs to gently hand stirring 3 to 5 minutes with a spatula. It should be mixed 3 to 5 minutes with a planetary mixer, if not used a long time.(Note: Improper stirring may change the rheology of the paste and its printing characteristics.)
Dilution:Dilution is not necessary, if you need, please use the thinner we recommend.

3.6  Storage and Safety
Storage: Storage in stable environment at 5℃-25℃.Storage in high temperature(>25℃) or in low temperature(<5℃) could cause irreversible changes in the material. 

Shelf life: The shelf life of 6 months(unopened),if used, please canned and stamped tape to save, the shelf life should not exceed 7 days.
Safety:  Please refer to the product MSDS.
 
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