Method for removal of flux and other residue in dense fluid systems
Method for removing flux residue and defluxing residue from an article using a dense processing fluid and a dense rinse fluid is disclosed herein. In one embodiment, there is provided a method comprising: introducing the article comprising contaminants into a processing chamber; contacting the article with a dense processing fluid comprising a dense fluid, at least one processing agent, and optionally a cosolvent to provide a partially treated article; and contacting the partially treated article with a dense rinse fluid comprising the dense fluid and optionally the cosolvent to provide a treated article wherein an agitation source is introducing during at least a portion of the first and/or the second contacting step.
1 . A method for removing contaminants from an article, the method comprising:
introducing the article comprising contaminants into a processing chamber;
contacting the article with a first composition to remove at least a portion of the contaminants, wherein the first composition comprises a dense fluid, at least one processing agent, and a cosolvent to provide a partially treated article; and
contacting the partially treated article with a second composition consisting of a dense fluid and a cosolvent to provide a treated article.
2 . The method of claim 1 wherein an agitation source is introducing during at least a portion of the first and/or the second contacting step.
3 . The method of claim 1 wherein the dense fluid in the dense processing fluid and/or the dense rinse fluid comprises one or more components selected from carbon dioxide, nitrogen, methane, oxygen, ozone, argon, hydrogen, helium, ammonia, nitrous oxide, hydrogen chloride, sulfur trioxide, and water.
4 . The method of claim 1 wherein the dense fluid in the dense processing fluid and/or the dense rinse fluid comprises at least one fluorinated dense fluid selected from perfluorocarbon compounds, hydrofluorocarbons, fluorinated nitriles, fluoroethers, fluoroamines, fluorinated compounds, zeotropic mixtures of refrigerants, azeotropic mixtures of refrigerants, and combinations thereof.
5 . The method of claim 1 wherein the dense fluid in the dense processing fluid and/or the dense rinse fluid comprises one or more hydrocarbons having from 2 to 6 carbon atoms.
6 . The method of claim 1 wherein the dense fluid in the dense processing fluid and the dense rinse fluid are the same.
7 . The method of claim 1 wherein the dense fluid in the dense processing fluid and the dense rinse fluid are different.
8 . The method of claim 1 wherein the dense fluid in the dense processing fluid and the dense rinse fluid are prepared by isochoric processing.
9 . The method of claim 1 wherein the dense fluid in the dense processing fluid and the dense rinse fluid are prepared by compressor.
10 . The method of claim 1 wherein the at least one processing agent is selected from an acetylenic alcohol or derivative thereof, an acetylenic diol or derivative thereof, a dialkyl ester, an acid, an alkyl alkanolamine, a quaternary ammonium hydroxide, a quaternary ammonium fluoride salt, an amine-epoxide adduct, an amide, an organic carbonate, a carboxylic acid, an alkane diol, an alkane, a peroxide, a water, an urea, a haloalkane, a haloalkene, a beta-diketone, a carboxylic acid, an oxine, a tertiary amine, a tertiary diamine, a tertiary triamine, a nitrile, a beta-ketoimine, an ethylenediamine tetraacetic acid and derivatives thereof, a catechol, a choline-containing compound, a trifluoroacetic anhydride, an oxime, a dithiocarbamate, and combinations thereof.
11 . The method of claim 1 wherein the total concentration of the at least one processing agent in the dense processing fluid ranges from about 0.1 to about 20 wt. %.
12 . The method of claim 2 wherein the agitation source is selected from fluid jets, brushes, spinning, ultrasonic energy, sonic energy, and combinations thereof.
13 . The method of claim 1 wherein the dense processing fluid comprises at least one cosolvent.
14 . The method of claim 13 wherein the at least one cosolvent is selected from an ester, an ether, an alcohol, a nitrile, a hydrated nitrile, a glycol, a glycol ether, a monester glycol, a ketone, a fluorinated ketone, an amide, a carbonate, an alkane diol, and dimethyl sulfoxide.
15 . The method of claim 1 wherein the dense rinse fluid comprises at least one cosolvent.
16 . The method of claim 15 wherein the at least one cosolvent is selected from an ester, an ether, an alcohol, a nitrile, a hydrated nitrile, a glycol, a glycol ether, a monester glycol, a ketone, a fluorinated ketone, an amide, a carbonate, an alkane diol, and dimethyl sulfoxide.
17 . A method for removing contaminants from an article, the method comprising:
introducing the article comprising contaminants into a processing chamber;
contacting the article with a first composition to remove at least a portion of the contaminants, wherein the first composition comprises a dense processing fluid comprising a dense fluid, at least one processing agent, and a cosolvent to provide a partially treated article; and
contacting the partially treated article with a second composition consisting of a dense fluid and a cosolvent to provide a treated article,
wherein an agitation source is introduced during at least a portion of the first
and/or the second contacting step.