WO2013099853A1 - ソルダペースト - Google Patents
ソルダペースト Download PDFInfo
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- WO2013099853A1 WO2013099853A1 PCT/JP2012/083444 JP2012083444W WO2013099853A1 WO 2013099853 A1 WO2013099853 A1 WO 2013099853A1 JP 2012083444 W JP2012083444 W JP 2012083444W WO 2013099853 A1 WO2013099853 A1 WO 2013099853A1
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- WIPO (PCT)
- Prior art keywords
- solder paste
- flux
- solder
- mass
- discharge
- Prior art date
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Classifications
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- 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
-
- 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
- B23K35/0244—Powders, particles or spheres; Preforms made therefrom
-
- 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
- B23K35/0244—Powders, particles or spheres; Preforms made therefrom
- B23K35/025—Pastes, creams, slurries
-
- 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
-
- 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
- B23K35/22—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
Definitions
- the present invention relates to a solder paste in which a flux and solder powder are mixed, and more particularly, to a solder paste that has an effect of suppressing separation of flux and can be used in a discharge method, and can realize no residue of flux.
- FIG. 7A, 7B, 7C, 7D, 7E, and 7F are explanatory diagrams illustrating an example of a screen printing method.
- a screen 104 made of a steel plate in which an opening 103 is formed in accordance with the electrode 102 of the substrate 101 and the substrate 101 are brought into close contact as shown in FIG. 7B.
- solder paste S is put on the screen 104, and as shown in FIG. 7D, the solder paste S is opened by sliding in the direction of arrow F while the squeegee 105 is in close contact with the screen 104.
- the solder paste S is filled by sliding in the direction of arrow F while the squeegee 105 is in close contact with the screen 104.
- solder paste S filled in the opening 103 of the screen 104 is transferred to the substrate 101 side by separating the screen 104 and the substrate 101.
- Solder paste supply method by screen printing has become the most inexpensive and accurate method for supplying solder paste when continuously producing the same type of board, and it has become smaller as the board becomes lighter and thinner. The position is maintained as a method for supplying paste to the extremely narrowed soldering part.
- the subject needs to be a plane.
- FIG. 8 is an explanatory diagram showing an example of a discharge method.
- the discharging method the solder paste S is packed in the syringe 106, and the solder paste S is discharged from the nozzle 107 attached to the tip of the syringe 106 using the pressure of air or the like, and the solder paste S is applied to the electrode 102 of the substrate 101. Applied.
- the discharge method does not have to be a plane to be supplied, and can be supplied even to a subject having a three-dimensional structure, and the supply amount can be freely changed.
- FIG. 9A, FIG. 9B, FIG. 9C, and FIG. 9D are operation explanatory views showing an example of a manufacturing process of an electronic device.
- the solder paste S is applied from the nozzle 107 to the die bonding portion 111 of the substrate 110 by the discharge method described in FIG.
- a plating layer made of Ni (not shown) is formed on the die bonding portion 111.
- an element 112 such as a power element is mounted on the die bonding portion 111 to which the solder paste S is applied, as shown in FIG. 9B.
- An Ni plating layer (not shown) is also formed on the bonding surface of the element 112.
- the die bonding is a process of soldering the element 112 to the die bonding part 111 of the substrate (substrate) 110.
- the element 112 is mounted on the die bonding part 111 to which the solder paste S is applied, and soldering is performed in a reflow furnace.
- solder paste is sometimes used from the viewpoint of productivity and cost.
- the bonding pad 113 of the element 112 and the lead part 114 of the substrate (substrate) 110 are connected by wire bonding.
- Wire bonding is used to connect the element 112 to an internal circuit or an external terminal.
- a wire 115 such as an Al wire or an Au wire is connected by vibration pressing with ultrasonic waves.
- the element 112 and the lead part 114 are connected by wire bonding, as shown in FIG. 9D, the element 112 and the lead part 114 are molded with resin. In the molding, the element 112 and the lead part 114 are sealed with an epoxy resin 116 for the purpose of mechanical reliability, electrical reliability, and protection of a soldered part and a circuit.
- ⁇ About flux for solder paste> The basic characteristics of the flux for soldering require performances such as removal of metal oxides, prevention of reoxidation during melting of the solder, and reduction of the surface tension of the solder.
- the flux When such a flux is used in the solder paste, the flux must have the characteristic of suppressing the precipitation of the solder powder due to gravity after mixing and dispersing the solder powder having a large specific gravity and the flux. This is called the flux separation suppression effect.
- the solder powder dispersed in the flux will settle due to its own weight, and the flux will rise.
- the flux density in the solder paste is made and stable supply cannot be achieved.
- the dispersed state can be restored by stirring the solder paste.
- solder paste S packed in the syringe 106 as in the discharge method shown in FIG. 8
- the solder paste S cannot be stirred when the separation of the flux occurs.
- outside air is taken into the solder paste S during the stirring, and this causes empty shots that occur during discharge.
- the flux used for the solder paste used in the discharge method must be one that has a high flux separation inhibiting effect.
- the discharge method pressurizes the syringe filled with solder paste and causes the solder paste to flow due to the pressure difference, so the flux and solder powder flow rate is the same during the solder paste flow. Otherwise, the discharge amount will not be stable.
- the component of the flux used in the solder paste includes a component that does not decompose or evaporate by heating during soldering, and remains as a flux residue around the soldered portion after soldering.
- the flux residue is corrosive, the soldering part is gradually eroded, causing a short circuit due to migration and a dropout of the soldering part due to corrosion.
- the flux residue adversely affects the wire bonding property and moldability in the subsequent process. It also affects the insulation reliability of the circuit. Furthermore, in FIG. 9C wire bonding, the surface contamination of a to-be-joined part affects bondability.
- the higher fatty acid amide added to the flux as a thixotropic agent in Patent Document 1 is excellent in fluidity improving properties as a viscosity modifier and has the effect of decomposing to the residue when heated. The effect as an agent is poor.
- An object of the present invention is to provide a solder paste that eliminates such unstable ejection and suddenly clogged nozzles, and is free of residue due to decomposition of the flux by heating during soldering. .
- the material used for the flux for solder paste which has the property of becoming non-residue after heating by reflow soldering, is selected from materials that evaporate / sublimate by heating, and the flux is actually mixed to form solder paste, which is discharged Incorporated into the apparatus, intermittently applied pressure to monitor the discharge amount, and searched for a flux formulation that would ensure that the nozzle was not clogged during discharge and that the discharge amount was stable.
- the inventors realized discharge stability by combining the effect of preventing sedimentation of solder powder with polyalkylmethacrylate and the effect of increasing the fluidity of solder paste when pressure is applied to the syringe with stearamide.
- the present inventors have found a solder paste that is suitable for a discharge method in which the supply of solder paste can be freely controlled regardless of the screen, and that takes into account the characteristic that the flux becomes non-residue after soldering.
- the present invention relates to a solder paste produced by mixing a solder powder and a flux, and the flux is a methacrylic acid polymer that prevents the solder powder from settling in a room temperature range and decomposes or evaporates in the heating process during soldering.
- Solder paste containing 1.0% by mass to less than 2.0% by mass of polyalkyl methacrylate and 5.0% by mass to less than 15.0% by mass of stearamide as a viscosity modifier and having a viscosity of 50 to 150 Pa ⁇ s. It is.
- the flux content in the solder paste is preferably 11% by mass to less than 13% by mass.
- the flux is decomposed or evaporated by heating by reflow soldering, so that no flux residue remains, and no residue can be realized.
- it maintains the characteristics that the flux becomes non-residue after reflowing, prevents the solder powder from settling, and maintains the desired viscosity to stabilize the discharge amount during discharge supply by the discharge method. Can do.
- the application position and application amount of the solder paste can be changed, and an inexpensive manufacturing process can be provided at the time of assembling a multi-spec electronic board or electronic component.
- the solder paste of the present embodiment is generated by mixing flux and solder powder.
- the flux contained in the solder paste contains a methacrylic acid polymer as a thixotropic agent that prevents sedimentation of the solder powder.
- a methacrylic acid polymer polyalkyl methacrylate having an alkyl group is preferable.
- stearamide is included as a viscosity modifier.
- the alloy composition of the solder powder to be mixed is not particularly limited.
- the solder powder In the solder paste in which the solder powder is mixed with the flux added with polyalkylmethacrylate, the solder powder is prevented from settling at room temperature such as room temperature, and when the solder paste is used in the discharge method, Even when the syringe is packed and cannot be stirred, the separation of the solder powder and the flux is suppressed.
- Polyalkylmethacrylate evaporates during the heating process during soldering, and after soldering, the flux does not substantially remain and is not residue.
- the time required for evaporation of the polyalkyl methacrylate varies depending on the content of the polyalkyl methacrylate added to the flux.
- the solder paste discharge amount is affected by the viscosity of the solder paste in addition to the suppression of the separation of the solder powder and the flux.
- the viscosity of the solder paste varies depending on the content of stearamide added to the flux. Also, the viscosity of the solder paste varies depending on the flux content in the solder paste and the particle size of the solder powder.
- the viscosity of the solder paste is high, the lower the viscosity of the solder paste, the more the amount of solder paste discharged tends to increase.
- the viscosity of the solder paste decreases as the flux content in the solder paste increases. However, when the flux content is increased, the time until no residue is obtained becomes longer. Moreover, when the viscosity of the solder paste is too low, separation of the solder powder and the flux cannot be suppressed.
- FIG. 1 is an explanatory diagram showing a composition example of the solder paste of the present embodiment in a graph.
- FIG. 1 shows the content of polyalkyl methacrylate, the content of stearic acid amide, and the viscosity of the solder paste by a combination of polyalkyl methacrylate and stearic acid amide at a predetermined content.
- the time required for the evaporation of the polyalkyl methacrylate is considered in the heating process during soldering.
- the content of the polyalkyl methacrylate in the flux is preferably 1.0% or more and less than 2.0%.
- the stearamide content in the flux is preferably 5.0% or more and less than 15.0%.
- the solder paste has a viscosity of 50 Pa ⁇ s or more and less than 150 Pa ⁇ s in consideration of suppressing separation of the flux and solder powder and securing the amount of solder paste discharged when used in the discharge method. Is preferred.
- the viscosity of the solder paste is 50 Pa ⁇ s to 150 Pa ⁇
- the content of polyalkyl methacrylate and stearamide is selected so as to be less than s.
- a region indicated by a solid line in FIG. 1 is an optimal region that satisfies the conditions that can be discharged by using the discharge method and that are free from residue by heating during soldering.
- the solder paste of the present embodiment When the solder paste of the present embodiment is used in the discharge method, the nozzle is prevented from being clogged and a desired discharge amount is secured.
- the solder paste of the present embodiment uses a flux having a composition that evaporates in the heating process during soldering, thereby realizing no residue.
- the performance of the flux is lost when the solder melts, such as decomposition and removal of metal oxides, prevention of reoxidation during solder melting, and reduction in solder surface tension. Therefore, the soldering ability by the flux becomes insufficient. For this reason, in the heating process at the time of soldering, the inside of the reflow furnace is set to a non-oxidizing atmosphere or a weak reducing atmosphere (5% H 2 or less) that does not explode.
- Flux of composition 1 to composition 3 was prepared with the composition shown in Table 1 below. Each flux of composition 1 to composition 3 was mixed with solder powder (Sn-3Ag-0.5Cu particle size 25 to 36 ⁇ m) so that the flux content would be 10%, 11% and 12%. 9 types of solder pastes A to I shown in FIG. And when solder paste was used by the discharge method, it compared about the relationship between the content of flux, and the discharge amount of a solder paste.
- FIG. 2 is a graph showing the transition of flux content and solder paste discharge rate. As shown in the graph of FIG. 2, in the solder paste containing the flux having the composition shown in Table 1, the nozzle clogged within 5 hours from the start of discharge except for the solder paste I in which the content of the flux of the composition 3 is 12%. Occurred and subsequent discharge became impossible.
- the time until the nozzle is clogged tends to increase as the flux content in the solder paste increases.
- the time until the nozzle is clogged tends to be longer in the compositions 2 and 3 containing the polyalkyl methacrylate than in the composition 1 not containing the polyalkyl methacrylate.
- solder pastes A to C with a flux content of 10% are not significantly affected by the flux composition, and the time until the nozzle is clogged with any of the composition 1 to composition 3 fluxes. It tends to be shorter.
- the flux content in the solder paste needs to be 11% or more.
- Flux of composition 4 to composition 7 was prepared with the composition shown in Table 3 below, and each flux of composition 4 to composition 7 and solder powder ( Sn-3Ag-0.5Cu particle size of 25 to 36 ⁇ m) was mixed to prepare four types of solder pastes J to M shown in Table 4. And the discharge test was implemented on the conditions mentioned above, and when the solder paste was used by the discharge method, the relationship between the composition of the flux and the discharge amount of the solder paste was compared.
- FIG. 3 is a graph showing the transition of the flux composition and the discharge amount of the solder paste. As shown in FIG. 3, there was no solder paste in which nozzle clogging occurred for a predetermined continuous discharge time, in this example, for 5 hours. This is considered to be due to the effect of stearamide as a lubricant in addition to the effect of inhibiting separation of the flux and solder paste by polyalkylmethacrylate.
- the solder paste that can be discharged as the solder paste is the solder pastes J to L that use the flux of the composition 4 to the composition 6, and the solder paste M that uses the flux of the composition 7 has too little discharge amount. It was found to be unsuitable for discharge.
- FIG. 4 is a graph showing the relationship between the flux content, the particle size of the solder powder, and the viscosity of the solder paste. As shown in FIG. 4, when the flux content in the solder paste increases, the viscosity of the solder paste tends to decrease. Moreover, when the particle size of the solder powder is reduced, the viscosity of the solder paste tends to increase.
- FIG. 5 is a graph showing the relationship between the flux content, the particle size of the solder powder, and the discharge amount of the solder paste.
- the amount of solder paste discharged tends to increase.
- the particle size of solder powder becomes large, the discharge amount of solder paste tends to increase.
- the data of solder paste V in which the particle size of the solder powder is 25 to 36 ⁇ m and the flux content is 13% is missing. This is because the viscosity of the solder paste is too low, and the flux in the solder paste is separated before the discharge test is performed, making the discharge test impossible.
- FIG. 6 is a graph showing the relationship between the viscosity of the solder paste and the discharge amount of the solder paste. As shown in FIG. 6, when the viscosity of the solder paste is 150 Pa ⁇ s or more, the average discharge amount is 1 mg or less, and the discharge amount is too small to be suitable for discharge. On the other hand, when the viscosity of the solder paste is lower than 50 Pa ⁇ s, problems such as nozzle clogging occur due to the flux separation phenomenon described above, which is also unsuitable for ejection.
- the optimum viscosity range of the solder paste was 50 to 150 Pa ⁇ s.
- the flux has a composition in which the polyalkyl methacrylate content is 1.0% to less than 2.0% and the stearamide content is 5.0% to less than 15.0%.
- the solder paste has a viscosity of 50 Pa ⁇ s to 150 Pa ⁇ s.
- the solder paste of the present invention can be applied to supply by a discharge method because it can prevent the settling of solder powder and can achieve no residue of the flux after soldering.
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Abstract
Description
ソルダペーストが塗布された基板等にチップ部品を搭載し、リフロー工程ではんだを溶解して電気的な接続を行うSMT工法(Surface Mount Technology:表面実装技術)において、電子基板や電子デバイスを組み立てるための接合工程の第一段階は、はんだ粉末とフラックスを混合して作成されるソルダペーストを接合部に適量供給することに始まる。
はんだ付を行うためのフラックスが持つ基本特性は、金属酸化物の除去、はんだ溶融時の再酸化の防止、はんだの表面張力の低下等の性能が必要である。このようなフラックスがソルダペーストに使用される場合は、比重の大きなはんだ粉末とフラックスを混合分散させた後、重力によるはんだ粉末の沈降を抑制する特性をフラックスが兼ね備えている必要がある。これをフラックスの分離抑制効果と言う。
ソルダペーストに使用されるフラックスの成分には、はんだ付けの加熱によって分解、蒸発しない成分が含まれ、はんだ付け後にフラックス残渣としてはんだ付け部の周辺に残留する。フラックス残渣が腐食性を持った場合、はんだ付け部を徐々に侵食し、マイグレーションによる短絡や、腐食によるはんだ付け部の脱落が発生する。
以下の表1に示す組成で組成1~組成3のフラックスを調合した。フラックスの含有量が10%、11%、12%となるように、組成1~組成3の各々のフラックスと、はんだ粉末(Sn-3Ag-0.5Cu 粒度25~36μm)を混合して、表2に示すA~Iの9種類のソルダペーストを作製した。そして、ソルダペーストが吐出法で使用される場合において、フラックスの含有量と、ソルダペーストの吐出量の関係について比較した。
ノズル :内径0.72mmφ
吐出圧 :0.2MPa・s
吐出時間 :0.5sec
インターバル:0.5sec
以下の表3に示す組成で組成4~組成7のフラックスを調合し、上述した検討結果からフラックスの含有量が11%となるように、組成4~組成7の各々のフラックスと、はんだ粉末(Sn-3Ag-0.5Cu 粒度25~36μm)を混合して、表4に示すJ~Mの4種類のソルダペーストを作製した。そして、上述した条件で吐出試験を実施して、ソルダペーストが吐出法で使用される場合において、フラックスの組成と、ソルダペーストの吐出量の関係について比較した。
以上の結果から、ソルダペーストの吐出量が最も多い条件となるポリアルキルメタクリレートの含有量を1%、ステアリン酸アミドの含有量を10%とした組成4のフラックスを、以下の表5に示す含有量とし、はんだ粉末(Sn-3Ag-0.5Cu)の粒径を、以下の表5に示す粒径としたN~Vの9種類のソルダペーストを作製した。そして、上述した条件で吐出試験を実施して、ソルダペーストが吐出法で使用される場合において、フラックスの含有量及びはんだ粉末の粒径と、ソルダペーストの吐出量の関係について比較した。
Claims (2)
- はんだ粉末とフラックスが混合されて生成されたソルダペーストにおいて、
前記フラックスは、ポリアルキルメタクリレートを1.0質量%以上~2.0質量%未満で含むと共に、ステアリン酸アミドを5.0質量%以上~15.0質量%未満で含み、
粘度を50~150Pa・sとした
ことを特徴とするソルダペースト。 - 前記フラックスの含有量を、11質量%以上~13質量%未満とした
ことを特徴とする請求項1記載のソルダペースト。
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Application Number | Priority Date | Filing Date | Title |
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US14/368,760 US20150027589A1 (en) | 2011-12-26 | 2012-12-25 | Solder Paste |
DE112012005672.8T DE112012005672B4 (de) | 2011-12-26 | 2012-12-25 | Lötpaste |
CN201280064828.2A CN104023904B (zh) | 2011-12-26 | 2012-12-25 | 焊膏 |
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JP2011283761A JP5453385B2 (ja) | 2011-12-26 | 2011-12-26 | ソルダペースト |
JP2011-283761 | 2011-12-26 |
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US (1) | US20150027589A1 (ja) |
JP (1) | JP5453385B2 (ja) |
CN (1) | CN104023904B (ja) |
DE (1) | DE112012005672B4 (ja) |
WO (1) | WO2013099853A1 (ja) |
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CN104625461A (zh) * | 2014-12-30 | 2015-05-20 | 株洲南车时代电气股份有限公司 | 一种高性能预成型焊片及其焊接方法 |
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WO2017057651A1 (ja) * | 2015-09-30 | 2017-04-06 | オリジン電気株式会社 | 還元ガス用ソルダペースト、半田付け製品の製造方法 |
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- 2012-12-25 WO PCT/JP2012/083444 patent/WO2013099853A1/ja active Application Filing
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DE112012005672B4 (de) | 2019-11-14 |
JP5453385B2 (ja) | 2014-03-26 |
JP2013132654A (ja) | 2013-07-08 |
US20150027589A1 (en) | 2015-01-29 |
CN104023904B (zh) | 2016-01-20 |
DE112012005672T5 (de) | 2014-10-09 |
CN104023904A (zh) | 2014-09-03 |
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