Patent ID: 7740713
Filing Date: 2010-06-22
Classification: B23K,H05K

Abstract:
1. A flux composition, wherein the flux composition leaves a solid washable residue upon completion of a soldering process that can be cleaned with water, comprising: a fluxing agent comprising organic acid, wherein the flux composition comprises from about one percent by weight to about ten percent by weight of the fluxing agent, based on the total weight of the composition; an organic tacking agent, wherein said organic tacking agent increases the surface tension and viscosity of said flux composition, wherein said viscosity of said flux composition comprises a viscosity value in a range of from about 50 millipascal seconds to about 500 millipascal seconds and said surface tension of said flux composition comprises a surface tension value in a range of about 40 millinewtons per meter to about 200 millinewtons per meter, and wherein the flux composition comprises from about 50 percent by weight to about 99 percent by weight of the organic tacking agent, based on the total weight of the composition; an organic wetting agent; and water, wherein the water minimizes oxide formation and removes one or more oxides from a solder surface, and wherein the flux composition comprises from about one percent by weight to about five percent by weight water, based on the total weight of the composition.