The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 2013
Filed:
Dec. 08, 2011
Steven Dale Ittel, Wilmington, DE (US);
Zhigang Rick LI, Hockessin, DE (US);
Kurt Richard Mikeska, Hockessin, DE (US);
Paul Douglas Vernooy, Hockesssin, DE (US);
Steven Dale Ittel, Wilmington, DE (US);
Zhigang Rick Li, Hockessin, DE (US);
Kurt Richard Mikeska, Hockessin, DE (US);
Paul Douglas Vernooy, Hockesssin, DE (US);
E I du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A lead-free paste composition contains an electrically conductive silver powder, one or more glass frits or fluxes, and a lithium compound dispersed in an organic medium. The paste is useful in forming an electrical contact on the front side of a solar cell device having an insulating layer. The lithium compound aids in establishing a low-resistance electrical contact between the front-side metallization and underlying semiconductor substrate during firing.