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:
Dec. 06, 2011
Filed:
Dec. 02, 2010
David D. Fleming, Northborough, MA (US);
Mike K. Gallagher, Hopkinton, MA (US);
Kim Sang Ho, Richboro, PA (US);
Xiang-qian Liu, Collegeville, PA (US);
Mark R. Winkle, Lansdale, PA (US);
David D. Fleming, Northborough, MA (US);
Mike K. Gallagher, Hopkinton, MA (US);
Kim Sang Ho, Richboro, PA (US);
Xiang-Qian Liu, Collegeville, PA (US);
Mark R. Winkle, Lansdale, PA (US);
Rohm and Haas Electronic Materials LLC, Marlborough, MA (US);
Abstract
A polyamine flux composition is provided, comprising, as an initial component: a polyamine fluxing agent represented by formula I: wherein R, R, Rand Rare independently selected from a hydrogen, a substituted Calkyl group, an unsubstituted Calkyl group, a substituted Carylalkyl group and an unsubstituted Carylalkyl group; wherein Rcomprises at least two tertiary carbons and is selected from an unsubstituted Calkyl group, a substituted Calkyl group, an unsubstituted Carylalkyl group and a substituted Carylalkyl group; and, wherein the two nitrogens shown in formula I are each separately bound to one of the at least two tertiary carbons of R; with the proviso that when the polyamine fluxing agent of formula I is represented by formula Ia: then zero to three of R, R, Rand Ris(are) hydrogen. Also provided is a method of soldering an electrical contact using the polyamine flux composition.