Flux composition and techniques for use thereof

Patent metadata

Field	Value
Publication number	US-9815149-B2
Application number	US-201213438213-A
Country	US
Kind code	B2
Filing date	Apr 3, 2012
Priority date	Feb 25, 2011
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

The present invention is directed to flux compositions and uses thereof. One composition comprises an activator and a solvent being a glycerol ethoxylate with a molecular weight of 200-500. Another composition comprises an activator, a solvent being a glycerol ethoxylate with a molecular weight of 200-500 and an amine. A soldering method for joining objects is also provided, comprising the steps of applying a flux composition to at least a portion of one or more of the objects, and joining the objects.

First claim

What is claimed is:

1. A flux composition for use in solder-joining electrical components, the composition comprising:
an activator comprising a mixture of 2-acetyloxybenzoic acid, acetyl butyric acid, levulinic acid, 2-acetylbenzoic acid, 2-ketobutyric acid, acetoxyacetic acid, and pyruvic acid, wherein the activator comprises from about five percent by weight to about fifteen percent by weight of the composition;
a solvent comprising Glycereth-7, wherein the Glycereth-7 comprises from about sixty percent by weight to about ninety percent by weight of the composition; and
an amine comprising tetra(hydroxyethyl)ethylenediamine, wherein the tetra(hydroxyethyl)ethylenediamine comprises from about 5 percent by weight to about twenty-five percent by weight of the composition.

2. The flux composition of claim 1 , wherein a tackiness measure of the composition is a range from 100 gram force to 400 gram force.

3. A flux composition for use in solder-joining electrical components, the composition comprising:
an activator comprising a mixture of 2-acetyloxybenzoic acid, acetyl butyric acid, levulinic acid, 2-acetylbenzoic acid, 2-ketobutyric acid, acetoxyacetic acid, and pyruvic acid, wherein the activator comprises from about five percent by weight to about fifteen percent by weight of the composition;
a solvent comprising Glycereth-7, wherein the Glycereth-7 comprises from about eighty-five percent by weight to about ninety-five percent by weight of the composition; and
an amine comprising tetra(hydroxyethyl)ethylenediamine, wherein the tetra(hydroxyethyl)ethylenediamine comprises from about 5 percent by weight to about twenty-five percent by weight of the composition.

4. The flux composition of claim 3 , wherein the amine is soluble in water and viscous.

5. The flux composition of claim 3 , wherein a tackiness measure of the composition is a range from 100 gram force to 800 gram force.

Assignees

• Lee Kang-Wook
• Normand Nathalie
• Oberson Valerie
• IBM

Inventors

• Lee Kang-Wook
• Normand Nathalie
• Oberson Valerie

Classifications

• B23K35/3618

  Carboxylic acids or salts · CPC title

• B23K35/3612

  with organic compounds as principal constituents · CPC title

• B23K1/0016

  Soldering of electronic components · CPC title

• B23K35/3601 Primary

  with inorganic compounds as principal constituents · CPC title

• B23K35/362 Primary

  Selection of compositions of fluxes (B23K35/365, B23K35/368 take precedence) · CPC title