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AssigneeE. I. Du Pont de Nemours and Company
InventorsAlistair Graeme Prince, Richard John Sheffield Young, Giovanna Laudisio, Gary Coultart, Kenneth Warren Hang, Ben Whittle
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An aluminum paste comprising particulate aluminum, an organic vehicle and glass frit selected from (i) lead-free glass frits with a softening point temperature in the range of 550 to 611° C. and containing 11 to 33 wt.-% of SiO2, >0 to 7 wt.-% of Al2O3 and 2 to 10 wt.-% of B2O3 and (ii) lead-containing glass frits with a softening point temperature in the range of 571 to 636° C. and containing 53 to 57 wt.-% of PbO, 25 to 29 wt.-% of SiO2, 2 to 6 wt.-% of Al2O3 and 6 to 9 wt.-% of B2O3, useful in the production of aluminum back electrodes of PERC silicon solar cells.
An aluminum paste comprising particulate aluminum, an organic vehicle and at least one glass frit selected from the group consisting of (i) lead-free glass frits with a softening point temperature in the range of 550 to 611° C. and containing 11to 33wt.-% of SiO2, >0to 7wt.-% of Al2O3 and 2to 10wt.-% of B2O3 and (ii) lead-containing glass frits with a softening point temperature in the range of 571to 636 ° C. and containing 53 to 57 wt.-% of PbO, 25to 29wt.-% of SiO2, 2to 6wt.-% of Al2O3 and 6to 9wt.-% of B2O3, wherein the particulate aluminum is present in a proportion of 50to 80wt.%, based on total aluminum paste composition.
Dependencies are inferred from the claim text.