WO2022123988A1 - やに入りはんだ用フラックス、やに入りはんだ及びはんだ付け方法 - Google Patents
やに入りはんだ用フラックス、やに入りはんだ及びはんだ付け方法 Download PDFInfo
- Publication number
- WO2022123988A1 WO2022123988A1 PCT/JP2021/041302 JP2021041302W WO2022123988A1 WO 2022123988 A1 WO2022123988 A1 WO 2022123988A1 JP 2021041302 W JP2021041302 W JP 2021041302W WO 2022123988 A1 WO2022123988 A1 WO 2022123988A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flux
- rosin
- mass
- acid
- solder
- Prior art date
Links
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- 239000000243 solution Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229920005792 styrene-acrylic resin Polymers 0.000 description 1
- 229940095064 tartrate Drugs 0.000 description 1
- 150000003504 terephthalic acids Chemical class 0.000 description 1
- WJCNZQLZVWNLKY-UHFFFAOYSA-N thiabendazole Chemical compound S1C=NC(C=2NC3=CC=CC=C3N=2)=C1 WJCNZQLZVWNLKY-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 125000005591 trimellitate group Chemical group 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0227—Rods, wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0016—Brazing of electronic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/203—Fluxing, i.e. applying flux onto surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/02—Soldering irons; Bits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0205—Non-consumable electrodes; C-electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3612—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with organic compounds as principal constituents
- B23K35/3613—Polymers, e.g. resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3612—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with organic compounds as principal constituents
- B23K35/3616—Halogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/26—Selection of soldering or welding materials proper with the principal constituent melting at less than 400 degrees C
- B23K35/262—Sn as the principal constituent
Definitions
- the present invention relates to a flux for soldering, and a soldering method using the flux for soldering.
- the flux used for soldering chemically removes metal oxides present on the metal surface of the solder and the object to be soldered, allowing the movement of metal elements at the boundary between the two. Has the effect of soldering. Therefore, by soldering using a flux, an intermetallic compound can be formed between the solder and the metal surface of the object to be joined, and a strong bond can be obtained.
- soldering As the solder used in soldering, a solder called "soldering" in which a linear solder is filled with flux is known. A flux is proposed that is supposed to be used in such an ingress solder (see, for example, Patent Documents 1 and 2).
- soldering method using a soldering iron it is known to use a heating member called a soldering iron.
- a technique has been proposed in which a through hole is provided in the central shaft of a soldering iron, and solder enters the through hole to supply solder for soldering (see, for example, Patent Document 3).
- soldering When soldering is performed using a soldering iron as described in Patent Document 3, it is difficult to volatilize due to the thermal history assumed in soldering, which is contained in the flux of the solder that enters the through hole and is supplied to the through hole. Rosin may become a residue after heating and adhere to the inner surface of the through hole.
- the solder entering the soldering iron is supplied to the through hole in a state where the soldering iron is controlled to maintain a predetermined temperature exceeding the melting point of the solder. Soldering is performed continuously. As a result, deposits such as residues continue to be heated and become carbides, which causes charring in the through holes. Then, carbides may be accumulated in the through holes of the soldering iron, the diameter of the through holes may be reduced, and the solder may not be able to be supplied.
- volatile rosin is the main component, and by volatilizing the flux when the solder melts, carbon dioxide is deposited in the through holes of the soldering iron. Techniques have been proposed to prevent this from happening.
- the present invention has been made to solve such a problem, and an object of the present invention is to provide a flux that promotes the discharge of deposits, and a soldering method and a soldering method using this flux.
- the present invention there is a flux for soldering that is supplied to the through hole formed along the central axis of the soldering iron and is used for soldering, and the rosin ester is added to the mass of the entire flux.
- a flux for soldering iron containing 60% by mass or more and 99.9% by mass or less, and 0.1% by mass or more and 15% by mass or less of a covalently bonded halide with respect to the total mass of the flux.
- the covalently bonded halides are trans-2,3-dibromo-1,4-butenediol, triallyl isocyanurate 6 bromide, 1-bromo-2-butanol, 1-bromo-2-propanol, 3-bromo-1-.
- the rosin ester is one or more of one or more esterified rosins, or one or more of esterified two or more rosin mixtures, and the rosins to be esterified are natural rosins and natural rosins.
- another rosin may be contained in an amount of 0% by mass or more and 39% by mass or less with respect to the total mass of the flux.
- an activator other than the covalently bonded halide may be further contained in an amount of 0% by mass or more and 39% by mass or less with respect to the total mass of the flux.
- the present invention is a soldering solder in which the above-mentioned flux for soldering solder is filled in the solder.
- the rosin ester is 60% by mass or more and 99.9% by mass or less based on the total mass of the flux
- the covalently bonded halide is 0.1% by mass or more and 15% by mass based on the total mass of the flux.
- the rosin ester can liquefy the deposits due to the flux residue in the through holes of the soldering iron, promote the discharge of the deposits to the outside, and the deposits adhere to the inside of the through holes of the soldering iron. Can be suppressed.
- a covalently bonded halide which is a halide that is not classified as a halide (a halogen element that does not bond)
- good workability can be achieved without impairing reliability.
- the flux for soldering in the solder of the present embodiment includes a rosin ester and a covalently bonded halide which is a halide which is not classified as a halide.
- the rosin ester can liquefy the deposits due to the flux residue in the through holes of the soldering iron, promote the discharge of the deposits to the outside, and the deposits adhere to the inside of the through holes of the soldering iron. Can be suppressed.
- one of the problems with flux containing rosin ester is the decrease in acid value of the base material (rosin ester and other rosin) in the flux.
- the activity is insufficient with the amount of the conventional amine halogen salt added, and the through hole formed along the central axis of the soldering iron
- soldering method in which solder is supplied and soldered, there is a problem that non-wetting is likely to occur.
- the rosin ester is added to the mass of the entire flux.
- a covalently bonded halide which is 60% by mass or more and 99.9% by mass or less and is not classified as a halide is contained in an amount of 0.1% by mass or more and 15% by mass or less with respect to the total mass of the flux. This makes it possible to achieve good workability without impairing reliability while suppressing clogging of the through holes of the soldering iron with deposits.
- the content of the rosin ester is less than 60% by mass of the lower limit specified in the present invention, the effect of suppressing the clogging of the through holes of the soldering iron with deposits cannot be sufficiently obtained. Further, when the content of the rosin ester exceeds the upper limit of 99.9% by mass specified in the present invention, the wettability of the solder is lowered.
- the content of the covalently bonded halide is less than 0.1% by mass of the lower limit specified in the present invention, the workability is lowered. Further, if the content of the covalently bonded halide exceeds 15% by mass of the upper limit specified in the present invention, the reliability is lowered.
- the rosin ester is preferably one or more of one esterified rosin or one or more of an esterified mixture of two or more rosins.
- the rosin to be esterified include natural rosins such as gum rosin, wood rosin and tall oil rosin, and derivatives obtained from natural rosin.
- the rosin derivative include purified rosin, polymerized rosin, hydrogenated rosin (hydrogenated rosin), disproportionated rosin, hydrogenated disproportionated rosin, acid-modified rosin, phenol-modified rosin and ⁇ , ⁇ -unsaturated carboxylic acid modification.
- Purified products (acylated rosin, maleized rosin, fumarized rosin, etc.), purified products of polymerized rosin, hydrogenated products and disproportionated products, and purified products of ⁇ and ⁇ unsaturated carboxylic acid modified products, hydrogenated products and disproportionated products. Any of these, or a mixture thereof, may be mentioned.
- the rosin ester is preferably solid, but a liquid rosin ester may be used as long as it has a viscosity that allows flux to enter and process into the form of solder.
- the viscosity required for the flux for soldering is preferably 3500 Pa ⁇ s or more, for example.
- Covalently bound halides include trans-2,3-dibromo-1,4-butanediol, triallyl isocyanurate 6 bromide, 1-bromo-2-butanol, 1-bromo-2-propanol, 3-bromo-1-.
- the flux for soldering in the solder of the present embodiment may further contain rosin or resin other than the rosin ester in an amount of 0% by mass or more and 39% by mass or less with respect to the total mass of the flux.
- rosins include natural rosins such as gum rosin, wood rosin and tall oil rosin, and derivatives obtained from natural rosins.
- the rosin derivative include purified rosin, polymerized rosin, hydrogenated rosin, disproportionated rosin, hydrogenated disproportionated rosin, acid-modified rosin, phenol-modified rosin and ⁇ , ⁇ -unsaturated carboxylic acid-modified product (acrylicated rosin).
- the resin is at least one selected from terpene resin, modified terpene resin, terpenephenol resin, modified terpenephenol resin, styrene resin, modified styrene resin, xylene resin, and modified xylene resin. Resin can be further included.
- modified terpene resin an aromatic modified terpene resin, a hydrogenated terpene resin, a hydrogenated aromatic modified terpene resin and the like can be used.
- modified terpene phenol resin hydrogenated terpene phenol resin or the like can be used.
- modified styrene resin styrene acrylic resin, styrene maleic acid resin and the like can be used.
- modified xylene resin a phenol-modified xylene resin, an alkylphenol-modified xylene resin, a phenol-modified resol-type xylene resin, a polyol-modified xylene resin, a polyoxyethylene-added xylene resin and the like can be used.
- the flux for soldering may further contain an activator other than the covalently bonded halide in an amount of 0% by mass or more and 39% by mass or less with respect to the total mass of the flux.
- activators refer to halides other than covalently bonded halides, which are halides that are not classified as organic acids, amines, and halides.
- the other activator preferably contains 0% by mass or more and 20% by mass or less of an organic acid, 0% by mass or more and 10% by mass or less of an amine, and 0% by mass or more and 3% by mass or less of an amine halogen salt.
- Organic acids include glutaric acid, adipic acid, azelaic acid, eicosandiic acid, citric acid, glycolic acid, succinic acid, salicylic acid, diglycolic acid, dipicolinic acid, dibutylaniline diglycolic acid, suberic acid, sebacic acid, thioglycol.
- Acids phthalic acids, isophthalic acids, terephthalic acids, dodecanedic acid, parahydroxyphenylacetic acid, picolinic acid, phenylsuccinic acid, fumaric acid, maleic acid, malonic acid, lauric acid, benzoic acid, tartrate acid, tris isocyanuric acid (2- (Carboxyethyl), glycine, 1,3-cyclohexanedicarboxylic acid, 2,2-bis (hydroxymethyl) propionic acid, 2,2-bis (hydroxymethyl) butanoic acid, 4-tert-butylbenzoic acid, 2,3- Dihydroxybenzoic acid, 2,4-diethylglutaric acid, 2-quinolinecarboxylic acid, 3-hydroxybenzoic acid, malic acid, p-anisic acid, palmitic acid, stearic acid, 12-hydroxystearic acid, oleic acid, linoleic acid, Examples include linolenic acid.
- dimer acid which is a reaction product of oleic acid and linoleic acid
- trimer acid which is a reaction product of oleic acid and linoleic acid
- dimer acid which is a reaction product of oleic acid and linoleic acid.
- dimer acid examples thereof include hydrogenated dimer acid or hydrogenated trimeric acid obtained by adding hydrogen to trimeric acid which is a reaction product of oleic acid and linoleic acid.
- dimer acid other than the reaction product of oleic acid and linoleic acid dimer acid other than the reaction product of oleic acid and linoleic acid
- trimer acid other than the reaction product of oleic acid and linoleic acid dimer acid other than the reaction product of oleic acid and linoleic acid.
- dimer acid which is a reaction product of acrylic acid trimer acid which is a reaction product of acrylic acid, and methacrylic acid.
- trimer acid dimer acid which is a reaction product of acrylic acid and oleic acid
- trimer acid which is a reaction product of acrylic acid and oleic acid
- dimer acid which is a reaction product of acrylic acid and linoleic acid
- reaction of acrylic acid and linoleic acid Trimmer acid which is a reaction product of acrylic acid and linolenic acid
- dimer acid which is a reaction product of acrylic acid and linolenic acid
- trimer acid which is a reaction product of acrylic acid and linolenic acid
- dimer acid which is a reaction product of methacrylic acid and oleic acid, methacrylic acid and oleic acid.
- Trimmer acid which is a reaction product of methacrylic acid and linoleic acid
- dimer acid which is a reaction product of methacrylic acid and linoleic acid
- trimeric acid which is a reaction product of methacrylic acid and linoleic acid
- dimer acid which is a reaction product of methacrylic acid and linolenic acid, and methacrylic acid.
- Trimmer acid which is a reaction product of linolenic acid, dimer acid, which is a reaction product of oleic acid and linolenic acid, trimeric acid, which is a reaction product of oleic acid and linolenic acid, dimer acid, which is a reaction product of linoleic acid and linolenic acid, linole.
- Trimmer acid which is a reaction product of acid and linolenic acid, hydrogenated dimer acid obtained by adding hydrogen to dimer acid other than the above-mentioned reaction product of oleic acid and linoleic acid, and hydrogen to trimer acid other than the reaction product of oleic acid and linoleic acid. Examples thereof include hydrogenated trimeric acid added with.
- the present invention may contain any one or more of the above organic acids.
- amines examples include monoethanolamine, diphenylguanidine, ethylamine, triethylamine, ethylenediamine, triethylenetetramine, 2-methylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 1,2-dimethylimidazole, and 2-ethyl-4.
- the amine halogen salt is a compound obtained by reacting an amine with hydrogen halide, and examples thereof include aniline hydride and aniline hydrobromide.
- the amine of the amine halide hydride the above-mentioned amine can be used, and examples thereof include ethylamine, ethylenediamine, triethylamine, methylimidazole, 2-ethyl-4-methylimidazole, N, N-diethylaniline and the like, and halogens are used.
- hydrogen hydride include hydrides of chlorine, bromine, iodine and fluorine (hydrogen chloride, hydrogen bromide, hydrogen iodide, hydrogen fluoride).
- borofluoride may be used, and examples of the borofluoride include borofluoric acid and the like.
- the present invention may contain any one or more of the amine halogen salts, which are compounds obtained by reacting any of the above amines with hydrogen halides, and the amine halogen salts, which are compounds obtained by reacting amines with hydrogen halides, may be contained. , N, N-diethylaniline, HBr and the like.
- the reaction between the organic acid and the amine may be suppressed by reacting two or more kinds of the organic acid and the amine to form a salt and then adding the salt.
- the phosphate ester is 0% by mass or more and 10 wt% or less
- the silicone is 0% by mass or more and 5% by mass or less
- the surfactant is 0% by mass or more. It may contain 5% by mass or less, 0% by mass or more and 13% by mass or less of the solvent, and 0% by mass or more and 3% by mass or less of the defoaming agent.
- Examples of the phosphoric acid ester include methyl acid phosphate, ethyl acid phosphate, isopropyl acid phosphate, monobutyl acid phosphate, butyl acid phosphate, dibutyl acid phosphate, butoxyethyl acid phosphate, and 2-ethylhexyl acid phosphate.
- Fate Bis (2-ethylhexyl) phosphate, Monoisodecyl acid phosphate, Isodecyl acid phosphate, Lauryl acid phosphate, Isotridecyl acid phosphate, Stearyl acid phosphate, Oleyl acid phosphate, Beef fat phosphate, Palm Oil Phosphate, Isostearyl Acid Phosphate, Alkyl Acid Phosphate, Tetracosyl Acid Phosphate, Ethylene Glycol Acid Phosphate, 2-Hydroxyethyl Methacrylate Acid Phosphate, Dibutylpyrophosphate Acid Phosphate, 2-Ethylhexyl Phosphate Examples thereof include mono-2-ethylhexyl and alkyl (alkyl) phosphonates.
- the present invention may contain any one or more of the above phosphoric acid esters.
- silicones examples include dimethyl silicone oil, cyclic silicone oil, methylphenyl silicone oil, methylhydrogen silicone oil, higher fatty acid-modified silicone oil, alkyl-modified silicone oil, alkyl-aralkyl-modified silicone oil, amino-modified silicone oil, and epoxy-modified silicone oil. , Polyether-modified silicone oil, alkyl / polyether-modified silicone oil, carbinol-modified silicone oil and the like.
- the present invention may contain any one or more of the above silicones.
- surfactant examples include acrylic polymers, vinyl ether polymers, olefin polymers, butadiene polymers and the like, and examples of the acrylic polymers include polyoxyalkylene polyalkylamides.
- the present invention may contain any one or more of the above-mentioned surfactants.
- the solvent examples include various glycol ether solvents and the like, for example, phenyl glycol, hexylene glycol, hexyl diglycol and the like, but the solvent is not limited to these, and known solvents can be used.
- the shape of the solvent may be either solid or liquid.
- the solid solvent include neopentyl glycol (2,2-dimethyl-1,3-propanediol), dioxane glycol, 4- (1,1,3,3-tetramethylbutyl) phenol, catechol and the like.
- the present invention may contain any one or more of the above solvents.
- defoaming agent examples include acrylic polymers, vinyl ether polymers, butadiene polymers and the like.
- the present invention may contain any one or more of the above solvents.
- the squeeze solder of the present embodiment is a linear solder filled with the flux for squeeze solder described above.
- the flux for soldering is required to be solid at room temperature (for example, 25 ° C.) so as not to flow out in the process of processing the solder, or to have a predetermined high viscosity so as not to flow out.
- the viscosity required for the flux for soldering is preferably 3500 Pa ⁇ s or more, for example. If the flux for soldering is a low-viscosity liquid (viscosity is less than 3500 Pa ⁇ s) at 25 ° C., the workability of the soldering solder is deteriorated, which is not preferable.
- the shape of the solder that enters the sill is not limited to a linear shape having a circular cross section and a continuous shape.
- a shape with corners such as a quadrangle, a linear shape with an arbitrary cross-sectional shape such as a star shape, a pellet shape with an arbitrary cross-sectional shape such as a columnar shape or a prismatic shape, and a non-continuous shape, a continuous shape, or It can be appropriately changed to have a discontinuous form such as a sheet shape or a spherical shape.
- the wire diameter of the solder is 0.1 mm or more and 3.0 mm or less, preferably 0.3 mm or more and 1.6 mm or less. Further, the content of the flux filled in the solder is 0.5% by mass or more and 6% by mass or less, preferably 1.5% by mass or more and 4.5, when the solder is 100%. It is mass% or less, more preferably 2.0 mass% or more and 4.0 mass% or less.
- the solder may be Sn alone, Sn-Ag type, Sn-Cu type, Sn-Ag-Cu type, Sn-Bi type, Sn-In type, Sn-Zn type, Sn-Pb type, or any of these. It is composed of an alloy obtained by adding Sb, Bi, In, Cu, Zn, As, Ag, Cd, Fe, Ni, Co, Au, Ge, Ga, Al, Mn, Ti, P, Pb, Zr, etc. to the alloy. ..
- FIG. 1 is an explanatory diagram showing an example of a soldering iron used in the soldering method of the present embodiment
- FIGS. 2A, 2B, 2C and 2D are explanatory views showing the soldering method of the present embodiment. It is a figure.
- the soldering method of this embodiment is applied to through-hole mounting, single-sided board, and the like.
- the soldering iron 1A used in the soldering method of the present embodiment has a through hole 2 formed along the central axis of the soldering iron 1A, and includes a heater 3 as a heating means for heating the soldering iron 1A.
- the diameter D of the through hole 2 is larger than the diameter d 1 of the solder H, and the solder H can be supplied to the tip portion 10 of the soldering iron 1A through the through hole 2. Is. Further, in the soldering iron 1A, the diameter D of the through hole 2 is larger than the diameter d 2 of the lead terminal 101 of the electronic component 100, and the lead terminal 101 can be inserted into the tip portion 10 of the through hole 2.
- the lead terminal 101 of the electronic component 100 is inserted into the through hole 201 formed in the substrate 200.
- the heater 3 heats the soldering iron 1A until it exceeds the melting point of the solder, and controls the soldering iron 1A to maintain a predetermined temperature exceeding the melting point of the solder.
- the tip portion 10 of the soldering iron 1A is brought into contact with or close to the through hole 201 into which the lead terminal 101 is inserted, and the lead terminal 101 is inserted into the through hole 2 of the soldering iron 1A. do.
- solder H cut into a predetermined length is supplied to the through hole 2 of the soldering iron 1A, and the solder H is brought into contact with the lead terminal 101 inserted into the through hole 2.
- the soldering iron 1A By controlling the soldering iron 1A to maintain a predetermined temperature exceeding the melting point of the solder, as shown in FIG. 2C, the solder enters the soldering iron, the solder melts, and the through holes 201 and the lead terminal are formed. 101 is heated.
- soldering iron 1A When the soldering iron 1A enters the solder to a temperature that exceeds the melting point of the solder and heats the solder H, the viscosity of the flux in the solder enters the solder and the flux flows to the through hole 201 and the lead terminal 101, so that the solder is soldered. Metal oxides on the surfaces of the through hole 201 and the lead terminal 101 are removed, and the molten solder gets wet and spreads.
- the soldering iron 1A is separated from the through hole 201 to cure the solder that has spread to the through hole 201 and the lead terminal 101.
- the flux for soldering iron can liquefy the deposit due to the flux residue in the through hole of the soldering iron in the above-mentioned soldering method. It is possible to promote the discharge of the deposit to the outside and prevent the deposit from sticking to the inside of the through hole of the soldering iron.
- the soldering iron 1A is controlled to maintain a predetermined temperature exceeding the melting point of the solder, the solder H is supplied to the through hole 2 and the soldering is continuously performed. It is possible to suppress the adhesion of residue deposits in the through holes 2 and suppress the occurrence of problems such as the through holes 2 of the soldering iron 1A being clogged with the residue deposits.
- the flux for soldering into the solder is good without impairing the reliability in the above-mentioned soldering method. It is possible to achieve a good workability.
- ⁇ Through hole wettability test> (1) Verification method Prepare a 1.6 mm thick through-hole board with pin parts inserted, and use a J-CAT300SLV manufactured by Apollo Seiko at a soldering iron set temperature of 400 ° C and a soldering time of 1.0 s. The points were soldered. As described above, soldering in the through-hole wettability test is performed by feeding solder into a through hole formed along the central axis of the soldering iron. The substrate after the test was observed with a Keyence digital microscope VHX-6000, and the judgment was made under the following conditions.
- Insulation resistance value in 168 hours is 1 ⁇ 10 8 ⁇ or more ⁇ 168 hours insulation resistance value is less than 1 ⁇ 10 8 ⁇
- soldering in terms of solderability is performed by supplying solder into a through hole formed along the central axis of the soldering iron. After observing the inner diameter of the through hole of the soldering iron with a digital microscope at the end of 15,000 shots, the above-mentioned through-hole wettability test was carried out again, and the determination was made under the following conditions.
- Judgment criteria ⁇ The inner diameter of the through hole of the soldering iron containing deposits is 60% or more of the inner diameter of the through hole not containing deposits, and the through hole wettability test ⁇ Judgment ⁇ : Deposits The inner diameter of the through hole of the soldering iron containing deposits is 60% or more of the inner diameter of the through hole not containing deposits, and it is judged by the through hole wettability test. Inner diameter is less than 60% of the inner diameter of the through hole that does not contain deposits, or x judgment in the through hole wettability test
- the rosin ester is 60% by mass or more and 99.9% by mass or less based on the total mass of the flux, and the covalently bonded halide which is a halide not classified as a halide is 0.1% by mass or more and 15% by mass based on the total mass of the flux.
- the flux for soldering in the solder of each embodiment containing mass% or less the flux is supplied to the through hole formed along the central axis of the soldering iron and is used for the solder in the soldering iron, so that the center of the soldering iron is used.
- Comparative Example 1 and Comparative Example 2 in which the content of the rosin ester was lower than the lower limit of the range specified in the present invention, the desired solderability could not be obtained. Further, an amine halide salt which does not contain a covalently bonded halide which is a halide which is not classified as a halide and is a halide other than the covalently bonded halide which is a halide which is not classified as a halide is within the range specified in the present invention. In Comparative Example 3 containing more than the upper limit value, the amount of halide (potential difference) did not satisfy the desired value, and a good effect could not be obtained.
- Comparative Example 4 in which the content of the amine halogen salt is within the range specified in the present invention but does not contain the covalently bonded halide which is a halide which is not classified as a halide, the through-hole wettability test and soldering are performed. The soldering property did not satisfy the desired value, and a good effect could not be obtained.
- a covalently bonded halide which is a halide which is not classified as a halide is contained within the range specified in the present invention, so that the covalent halide is a halide which is not classified as a halide.
- the solder enters the through hole formed along the central axis of the soldering iron and the solder is supplied. Good effects were obtained in the through-hole wettability test and solderability in the soldering method. Good results were also obtained for other reliability tests.
- a covalently bonded halide which is a halide not classified as a halide contains trans-2,3-dibromo-2-butene-1,4-diol, but the content thereof is an upper limit within the range specified in the present invention.
- the precipitation amount of the activator did not satisfy the desired value, and a good effect could not be obtained.
- Comparative Example 6 in which 2,2,2-tribromoethanol is contained as a covalently bonded halide which is a halide not classified as a halide, but the content thereof exceeds the upper limit of the range specified in the present invention, insulation is provided. The reliability (insulation resistance value) did not satisfy the desired value, and a good effect could not be obtained.
- the content of the rosin ester and the content of the organic acid are within the range specified in the present invention, but in Comparative Example 7 which does not contain the covalently bonded halide which is a halide which is not classified as a halide, the through-hole wetting The liftability test and solderability did not satisfy the desired values, and good effects could not be obtained.
- the content of the rosin ester and the content of the amine are within the ranges specified in the present invention, but in Comparative Example 8 which does not contain the covalently bonded halide which is a halide which is not classified as a halide, the through hole gets wet. The property test and solderability did not satisfy the desired values, and good effects could not be obtained.
- Comparative Example 4 Comparative Example 7 and Comparative Example 8 described above, if a covalently bonded halide which is a halide not classified as a halide is not contained, another active agent is contained within the range specified in the present invention. However, a good effect was not obtained in the through-hole wettability test and solderability in the soldering method in which the solder enters the through hole formed along the central axis of the soldering iron and the solder is supplied. ..
- Example 27 by including the covalently bonded halide which is a halide which is not classified as a halide within the range specified in the present invention, the solder is soldered even if it does not contain other activators. A good effect was obtained in the through-hole wettability test and the solderability in the soldering method in which the solder enters the through hole formed along the central axis of the iron and the solder is supplied. Good results were also obtained for other reliability tests.
- Example 1 other active agents are defined in the present invention by including a covalently bonded halide which is a halide which is not classified as a solder within the range specified in the present invention. Even if it is included within the range, it has a good effect on the through-hole wettability test and solderability in the soldering method performed by supplying solder by entering the through hole formed along the central axis of the soldering iron. Obtained. Good results were also obtained for other reliability tests.
- a covalently bonded halide which is a halide which is not classified as a solder within the range specified in the present invention. Even if it is included within the range, it has a good effect on the through-hole wettability test and solderability in the soldering method performed by supplying solder by entering the through hole formed along the central axis of the soldering iron. Obtained. Good results were also obtained for other reliability tests.
- a covalently bonded halide which is a halide which is not classified as a halide in the flux for soldering, which contains the rosin ester within the range specified by the present invention, within the range specified by the invention.
- the flux for soldering which is used in the soldering method used in the soldering method performed by supplying solder into the through hole formed along the central axis of the soldering iron, and the soldering method have technical features. I understand.
- the rosin ester is 60% by mass or more and 99.9% by mass or less with respect to the total mass of the flux, and the covalently bonded halide which is a halide not classified as a solder is 0.
- the through hole gets wet by being used for the solder that is supplied to the through hole formed along the central axis of the soldering iron. Good results were obtained for each of the property test and the reliability test (insulation reliability (insulation resistance value), halide amount (potential difference), solderability, precipitation of activator).
Abstract
Description
本実施の形態のやに入りはんだ用フラックスは、ロジンエステルと、ハライドとして区分されないハロゲン化物である共有結合ハロゲン化物を含む。
本実施の形態のやに入りはんだは、上述したやに入りはんだ用フラックスが充填された線状のはんだである。やに入りはんだ用フラックスは、はんだを加工する工程で流れ出さないように常温(例えば25℃)で固形であること、あるいは流れ出さないような所定の高粘度であることが求められる。なお、やに入りはんだ用フラックスに求められる粘度は、例えば3500Pa・s以上であることが好ましい。やに入りはんだ用フラックスが25℃において低粘度液体(粘度が3500Pa・s未満)であると、やに入りはんだの加工性が低下するため好ましくない。なお、後述するはんだごての中心軸に沿って形成された貫通孔に供給可能な形状であれば、やに入りはんだの形状は、断面が円形で連続した形態の線状に限定されず、四角形等の角を有した形状や、星型等の任意の断面形状で連続した形態の線状、円柱状や角柱状等の任意の断面形状で非連続な形態のペレット状、連続した形態または非連続な形態のシート状、球状等、適宜変更可能である。
図1は、本実施の形態のはんだ付け方法で使用されるはんだごての一例を示す説明図、図2A、図2B、図2C及び図2Dは、本実施の形態のはんだ付け方法を示す説明図である。
やに入りはんだ用フラックスが、本発明で規定された所定量のロジンエステルを含むことで、上述したはんだ付け方法において、はんだごての貫通孔内のフラックス残渣による堆積物を液状化させることができ、堆積物の外部への排出を促進して、堆積物がはんだごての貫通孔の内部へ固着することを抑制できる。
(1)検証方法
ピン部品を挿入した厚さ1.6mmのスルーホール基板を用意し、アポロ精工製J-CAT300SLVを用いて、はんだごての設定温度400℃、はんだ付け時間1.0sで40ポイントのはんだ付けを実施した。スルーホール濡れ上がり性試験におけるはんだ付けは、上述したように、はんだごての中心軸に沿って形成された貫通孔にやに入りはんだを供給して行われる。試験後の基板をキーエンス製デジタルマイクロスコープ VHX-6000で観察し、下記条件で判定した。
◎:スルーホール内にはんだが充填されているポイントの割合が100%
〇:スルーホール内にはんだが充填されているポイントの割合が95%以上100%未満
×:スルーホール内にはんだが充填されているポイントの割合が95%未満
(a)絶縁信頼性
(1)検証方法
JIS Z 3197に則り、やに入りはんだをくし形基板にはんだ付けし、85℃85%RHの高温高湿条件下に設置して、エスペック製イオンマイグレーション評価システムAMI-150-U-5を用いて100Vの電圧を印加することで電気絶縁性を測定した。JIS Z 3283よりJIS A級は168時間経過時点の絶縁抵抗値が1×108Ω以上と規定されているため、下記条件で判定した。
◎:168時間での絶縁抵抗値が1×108Ω以上
×:168時間での絶縁抵抗値が1×108Ω未満
(1)検証方法
JIS Z 3197に則り、京都電子工業製電位差自動滴定装置AT-610を用いてやに入りはんだ用フラックスの2-プロパノール溶液を硝酸銀水溶液で滴定し、電位差の変位点からハライド含有量を求めた。JIS Z 3283よりJIS A級はハライド含有量が0.5%以下と規定されている為、下記条件で判定した。
◎:ハライド含有量が0.5%以下
×:ハライド含有量が0.5%超
(1)検証方法
ピン部品を挿入せずに裏面にテープを貼付した厚さ1.6mmのスルーホール基板を用意し、はんだごての設定温度400℃、はんだ付け時間1.0sで15000ショットのはんだ付けを実施した。はんだ付け性におけるはんだ付けは、上述したように、はんだごての中心軸に沿って形成された貫通孔にやに入りはんだを供給して行われる。15000ショット終了時にはんだごての貫通孔の内径をデジタルマイクロスコープで観察した後に、再度上記スルーホール濡れ上がり性試験を実施し、下記条件で判定した。
◎:堆積物を含むはんだごての貫通孔の内径が、堆積物を含まない貫通孔内径に対して60%以上、且つスルーホール濡れ上がり性試験で◎判定
〇:堆積物を含むはんだごての貫通孔の内径が、堆積物を含まない貫通孔内径に対して60%以上、且つスルーホール濡れ上がり性試験で〇判定
×:堆積物を含むはんだごての貫通孔の内径が、堆積物を含まない貫通孔内径に対して60%未満、又はスルーホール濡れ上がり性試験で×判定
(1)検証方法
作製した実施例、比較例のやに入りはんだ用フラックスを容器に移して冷却させ、固化させた際の外観を目視で観察した。活性剤の析出が発生するとはんだ付け時の外観が悪くなる上、フラックス成分の偏りによる性能安定性への影響や信頼性への懸念も増加することから避ける必要があり、下記条件で判定した。
◎:固化したフラックス中に活性剤の析出が確認されない
×:固化したフラックス中に活性剤の析出が確認される
Claims (7)
- はんだごての中心軸に沿って形成された貫通孔に供給されるやに入りはんだに使用されるやに入りはんだ用フラックスあって、
ロジンエステルを、フラックス全体の質量に対して60質量%以上99.9質量%以下、
共有結合ハロゲン化物を、フラックス全体の質量に対して0.1質量%以上15質量%以下含む
やに入りはんだ用フラックス。 - 前記共有結合ハロゲン化物は、trans-2,3-ジブロモ-1,4-ブテンジオール、トリアリルイソシアヌレート6臭化物、1-ブロモ-2-ブタノール、1-ブロモ-2-プロパノール、3-ブロモ-1-プロパノール、3-ブロモ-1,2-プロパンジオール、1,4-ジブロモ-2-ブタノール、1,3-ジブロモ-2-プロパノール、2,3-ジブロモ-1-プロパノール、2,3-ジブロモ-1,4-ブタンジオール、2,3-ジブロモ-2-ブテン-1,4-ジオール、trans-2,3-ジブロモ-2-ブテン-1,4-ジオール、cis-2,3-ジブロモ-2-ブテン-1,4-ジオール、2,2-ビス(ブロモメチル)-1,3-プロパンジオール、テトラブロモエタン、テトラブロモブタン、テトラブロモフタル酸、ブロモコハク酸、2,2,2-トリブロモエタノールの何れか1種または2種以上である
請求項1に記載のやに入りはんだ用フラックス。 - 前記ロジンエステルは、1種のロジンをエステル化したものの1種以上、あるいは、2種以上のロジン混合物をエステル化したものの1種以上であり、エステル化するロジンは、天然ロジン、並びに天然ロジンから得られるロジン誘導体である精製ロジン、重合ロジン、水添ロジン、不均化ロジン、水添不均化ロジン、酸変性ロジン、フェノール変性ロジン及びα、β不飽和カルボン酸変性物、並びに重合ロジンの精製物、水素化物及び不均化物、並びにα、β不飽和カルボン酸変性物の精製物、水素化物及び不均化物のいずれか、あるいは、その混合物である
請求項1または請求項2に記載のやに入りはんだ用フラックス。 - 更に他のロジンを、フラックス全体の質量に対して0質量%以上39質量以下含む
請求項1~請求項3の何れか1項に記載のやに入りはんだ用フラックス。 - 更に共有結合ハロゲン化物以外の活性剤を、フラックス全体の質量に対して0質量%以上39質量%以下含む
請求項1~請求項4の何れか1項に記載のやに入りはんだ用フラックス。 - 請求項1~請求項5の何れか1項に記載のやに入りはんだ用フラックスがはんだに充填された
やに入りはんだ。 - ロジンエステルを、フラックス全体の質量に対して60質量%以上99.9質量%以下、共有結合ハロゲン化物を、フラックス全体の質量に対して0.1質量%以上15質量%以下含むやに入りはんだ用フラックスが充填されたはんだからなるやに入りはんだが、はんだごての中心軸に沿って形成された貫通孔に供給され、
前記はんだの融点を超える温度まで、前記やに入りはんだを前記はんだごてで加熱して、接合対象物を加熱すると共に前記やに入りはんだを溶融させる
はんだ付け方法。
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MX2023006665A MX2023006665A (es) | 2020-12-11 | 2021-11-10 | Fundente para soldadura con nucleo de resina, soldadura con nucleo de resina y metodo de soldadura. |
US18/266,377 US20240033863A1 (en) | 2020-12-11 | 2021-11-10 | Flux for Resin-Cored Solder, Resin-Cored Solder, and Soldering Method |
KR1020237018425A KR102661293B1 (ko) | 2020-12-11 | 2021-11-10 | 송진 함유 땜납용 플럭스, 송진 함유 땜납 및 납땜 방법 |
CN202180083079.7A CN116600930B (zh) | 2020-12-11 | 2021-11-10 | 包芯软钎料用助焊剂、包芯软钎料和软钎焊方法 |
EP21903092.1A EP4260971A1 (en) | 2020-12-11 | 2021-11-10 | Flux for resin-cored solder, resin-cored solder, and soldering method |
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