Sandoz Building Material Ltd.

 

Sandoz series paste is a front electrode for mono and multi-crystalline silicon solar cell wafers. It easily penetrates the anti-reflective (SiNx:H or TiO2-x) layer during the firing process and provides low contact resistance. Ag Paste can be co-fired with commercially available backside Al and Ag-Al Pastes.These Silver Metallization Pastes are customizable to your process, thus increasing efficiency and fill factor while providing wider processing windows.

Front Side Ag Paste Properties:

Capture higher efficiencies and wider processing window
Achieve a higher aspect ratio
Excellent fine line resolution
Low contact resistance on lightly doped emitter
Cd free
Pb free available

Back Side Ag Paste Properties:

Increased adhesion
Co-firable with back Aluminum and front Silver pastes
Greater peak adhesion strength
Increased paste coverage with superior results provides a high quality, cost effective solution


 

Solids Content

90~93%

Viscosity(PaS)(Brookfield HBT,25C,10rpm)

200-350

 

Fineness

<10m

Screen(BOPP stainless steel)

400/18mesh

Drying

250~300C/1min      infrared stove,250~300C/3min

Peak Temperature

780~830C

Dried Thickness

223m

Fired Thickness

152m

Adhesion(N)

>3N

(220C,62Sn/36Pb/2Ag)solderability

>95%

(220C,62Sn/36Pb/2Ag)weldability

10Seconds

Photoelectricity Conversion Efficiency

Single crystal silicon, average conversion efficiency19.3

Polysilicon, average conversion efficiency 17.8