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US 10,593,439 B2Granted
Conductive paste composition and semiconductor devices made therewith
AssigneeDupont Electronics, Inc.
InventorsHee Hyun Lee, Viacheslav V Diev, Eric Maurice Smith, Kalyan Venkata Chalapathi Rapolu
Life of this patent
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Abstract
The present invention provides a thick-film paste composition for printing the front side of a solar cell device having one or more insulating layers. The thick-film paste comprises an electrically conductive metal and an oxide composition dispersed in an organic medium that includes an organopolysiloxane and a fluorine-containing degradation agent.
Claims13
A paste composition, comprising:
- an inorganic solids portion that comprises:
- (a) a source of electrically conductive metal, and
- (b) an inorganic oxide-based component having a softening point in the range of 250 to 800° C. and present in an amount that comprises 0.25 to 12 wt % of the total weight of the paste composition, and
- a vehicle in which the constituents of the inorganic solids portion are dispersed, the vehicle comprising:
- (c) an organopolysiloxane in an amount ranging from 0.05% to 2% by weight of the paste composition;
- (d) a fluorine-containing degradation agent comprising tetrabutylammonium fluoride;
- and
- (e) a solvent.
5 more elements
The A paste composition, comprising:
- an inorganic solids portion that comprises:
- (a) a source of electrically conductive metal, and
- (b) an inorganic oxide-based component having a softening point in the range of 250 to 800° C. and present in an amount that comprises 0.25 to 12 wt % of the total weight of the paste composition, and
- a vehicle in which the constituents of the inorganic solids portion are dispersed, the vehicle comprising:
- (c) an organopolysiloxane in an amount ranging from 0.05% to 2% by weight of the paste composition;
- (d) a fluorine-containing degradation agent comprising a substance having the formula [Mk+][X−]k, wherein Mk+ is a cation with positive charge k and X− is F− or (HF2)−;
- and
- (e) a solvent,
- and wherein the inorganic oxide-based component comprises a lead tellurium oxide glass frit that optionally comprises at least one of 0.25 to 5 wt. % B2O3 or 0.1 to 5 wt. % Li2O.
6 more elements
Dependencies are inferred from the claim text.