Abstract: A conductive polymer thick film composition suitable for lead-free soldering comprising metallic particles and an organic vehicle comprising at least one phenolic resin and a solvent is provided. A method of soldering to the conductive polymer thick film composition of the invention is also provided. An article comprising a substrate and a cured polymer film on a surface of the substrate formed of the conductive polymer thick film composition of the invention is provided.
Type:
Grant
Filed:
October 30, 2014
Date of Patent:
May 29, 2018
Assignee:
Heracus Precious Metals North America Conshohocken LLC
Abstract: Paste compositions, methods of making a paste composition, and methods of making a solar cell contact are disclosed. The paste composition can contain silver, a glass frit, a metal additive and an organic vehicle system. The metal additive is at least one selected from the group consisting of yttrium, an organo-vanadium compound, organo-antimony compound, organo-phosphorus compound, and an organo-yttrium compound. The paste can be used for making a solar cell contact.
Type:
Grant
Filed:
October 27, 2011
Date of Patent:
October 11, 2016
Assignee:
Heracus Precious Metals North America Conshohocken LLC
Inventors:
Yi Yang, Aziz S. Shaikh, Srinivasan Sridharan
Abstract: Silicon solar cells and contacts thereof are printed in at least a two stage printing process where the busbars and fingerlines may be printed separately. A reduction in silver content in busbars and fingerlines through use of the techniques of the invention have been realized, including the use of certain base metals, while maintaining low contact resistance similar to silve pastes.
Type:
Grant
Filed:
April 18, 2013
Date of Patent:
May 17, 2016
Assignee:
Heracus Precious Metals North America Conshohocken LLC
Inventors:
Yi Yang, Aziz S. Shaikh, Kristina McVicker, Klaus Kunze, Srinivasan Sridharan
Abstract: Formulations and methods of making solar cell contacts and cells therewith are disclosed. In general, the invention provides a solar cell comprising a contact made from a mixture wherein, prior to firing, the mixture comprises at least one aluminum source, at least one source of a metal including one or more of boron, titanium, nickel, tin, gallium zinc, indium, and copper, and about 0.1 to about 10 wt % of a glass component. Within the mixture, the overall content of aluminum is about 50 wt % to about 85 wt % of the mixture, and the overall combined content of boron, nickel, tin, silver, gallium, zinc, indium, copper, is about 0.05 to about 40 wt % of the mixture.
Type:
Grant
Filed:
July 9, 2007
Date of Patent:
November 5, 2013
Assignee:
Heracus Precious Metals North America Conshohocken LLC
Inventors:
Jalal Salami, Srinivasan Sridharan, Steve S. Kim, Aziz S. Shaikh