WO2007021006A1 - 鉛フリー低温はんだ - Google Patents
鉛フリー低温はんだ Download PDFInfo
- Publication number
- WO2007021006A1 WO2007021006A1 PCT/JP2006/316258 JP2006316258W WO2007021006A1 WO 2007021006 A1 WO2007021006 A1 WO 2007021006A1 JP 2006316258 W JP2006316258 W JP 2006316258W WO 2007021006 A1 WO2007021006 A1 WO 2007021006A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- solder
- lead
- mass
- low
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
-
- 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
-
- 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
- B23K35/264—Bi as the principal constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C12/00—Alloys based on antimony or bismuth
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3457—Solder materials or compositions; Methods of application thereof
- H05K3/3463—Solder compositions in relation to features of the printed circuit board or the mounting process
Definitions
- the present invention relates to a low-temperature solder that can be soldered at a low temperature that does not affect the object to be soldered, and particularly to a lead-free low-temperature solder and a solder joint for joining electronic components.
- Conventional low-temperature solder includes Sn-52Bi-32Pb (melting point: 95 ° C), Sn-54Bi-20Cd (melting point: 103 ° C), Sn-40Pb-40Bi (melting point: 113 ° C), Sn -52In (melting point: 117 ° C), Sn-58Bi (melting point: 139 ° C), Sn-32P b-18Cd (melting point: 143 ° C), Sn-32Cd (melting point: 175 ° C), etc.
- the appropriate soldering temperature is the liquidus temperature of the solder used + 20-40 ° C. Therefore, the low-temperature solder that solders low heat-resistant parts has a liquidus temperature of 100 °. Near C Must be on the side, ie 90-110 ° C.
- the low-temperature solder used for soldering low heat-resistant parts must have sufficient heat fatigue resistance at -40 ° C to + 85 ° C, and it must be at the solidus temperature. Even if the electronics are not melted at the highest temperature exposed, it must be above 85 ° C! /.
- solder joins a metal (base material) and a metal (base material), various joining characteristics are required.
- the solder must have solderability so that it can easily get wet with the base material. This is solderability that does not hinder the production of electronic equipment, even if it is not very good solderability like conventional Pb-63Sn solder.
- the solder also requires excellent mechanical properties (tensile strength, bending, elongation, etc.) in the soldered portion. In other words, if a tensile force is applied to the soldered base material, the function of the electronic device will be completely lost if the soldered part is easily peeled off. Similarly, when a bending force is applied to the base material of the soldering part, it must have a ductility that prevents the solder from bending and easily cracking.
- solder also needs to have corrosion resistance.
- soldered electronic devices When soldered electronic devices are used only indoors, there is no problem with corrosion because the difference between the temperature and the temperature is very good and the environment is good.
- electronic equipment used for data communication station equipment, automobiles, military equipment, space-related equipment, outdoor recreation equipment, and the like often suffers from corrosion of solder, which is often placed outdoors.
- the temperature difference between daytime and nighttime is large outdoors, when electronic devices are exposed to high temperature power during the day and low temperature during the night, there is a lot of moisture and air around the soldering area during the day. Condensation on soldered parts at low temperatures at night.
- the solder and the base metal are dissimilar metals, the ionization tendency is naturally different, and the condensed moisture forms an electrolyte to form a local battery between the base material and the solder, so that the base material or the solder is electrically corroded. I will eat. The initial corrosion of the soldered part affects the electrical conductivity, and if the corrosion progresses, the continuity between the base materials is completely lost and the function of the electronic device cannot be performed.
- Sn-58Bi-based low-temperature solder which has been used for soldering electronic devices, has a liquidus temperature of 139 ° C. Cannot be used for soldering at ° C).
- Sn-52In low-temperature solder has a solidus temperature and a liquidus temperature of 117 ° C.
- Sn-52In low-temperature solder does not have sufficient heat fatigue resistance and solderability, so reliability is a problem. was there.
- Patent Document 1 proposes a Bi-In low-temperature solder.
- a composition in which In is 50 to 83 atomic% (35.4 to 72.8 mass%) and the remaining Bi is illustrated.
- the low-temperature solder disclosed in Patent Document 1 is for joining the optical head wiring pattern and the optical module.
- the BHn-based low-temperature solder here is used as a solder paste mixed in powder with a powder.
- Patent Document 1 JP 2001-198692 A
- composition specifically disclosed as an embodiment in Patent Document 1 is a solder composed of In, Bi, and Sn, and the liquidus temperature (joining temperature) is about 78.8. ° C.
- Patent Document 1 when soldering at a high temperature, a force using a composition of In of 50 atomic% (35.4% by mass).
- This alloy of In of 50 atomic% is a Biln metal. It is a composition that produces intermetallic compounds.
- Biln's intermetallic compound is brittle, so if an In50 atomic% alloy is used as solder, the soldered part will be easily broken by external impact.
- the brittle composition is not suitable for soldering, including the composition before and after the composition of Naguko only with In50 atomic%, that is, the composition containing a large amount of Biln intermetallic compounds in the structure. .
- the content of In is up to In83 atomic% including the eutectic composition of In and Biln.
- This In and Biln eutectic temperature is 73 ° C. It is said that even the composition around this low eutectic temperature can be used for soldering of a power module.
- peripheral members such as a substrate as well as the electronic component itself also generate heat.
- the temperature reaches 60 ° C or higher. If a solder alloy with a solidus temperature of less than 85 ° C is used for these electronic devices, the bonding strength of the solder joints in those electronic devices cannot be maintained. Therefore, in the present invention, the solder alloy has a solidus temperature of 85 ° C or higher.
- the composition with too much In has a solidus temperature lower than 85 ° C, so the atmosphere after soldering is close to 85 ° C. If it becomes, it will melt and the soldering part will be separated, so it cannot be used.
- solder alloys with a peritectic composition with less In also have In Bi intermetallic compound strength.
- the present invention is lead-free, has a liquidus temperature power of 10 ° C or lower and a solidus temperature of 85 ° C or higher, and is not brittle. It is an object of the present invention to provide a low-temperature solder and a solder joint excellent in heat fatigue resistance.
- the inventor of the present invention has a specific range of Bi-In binary alloy of In 48 mass% or more, 52.5 mass% or less, preferably 52.3 mass% or less, and less than 52.3 mass%. Between metals
- the compound is unexpectedly brittle and has a breaching force.
- the Bi-In alloy satisfies the liquidus temperature required for low-temperature soldering, and has excellent thermal fatigue resistance and solderability. As a result, the present invention was completed.
- the present invention is a low-temperature lead-free solder composed of 48 to 52.5% by mass of In and the balance Bi, having a solidus temperature of 85 ° C or higher and a liquidus temperature of 110 ° C or lower.
- Low temperature lead-free for electronic components characterized by the presence of Biln intermetallic compounds in the structure of free solder
- one or more intermetallic compounds selected from Bi In and Biln exist.
- In is more preferably 50.0 to 52.0% by mass.
- Zn is contained in an amount of 0.01 to 0.4 mass% and / or La in an amount of 0.05 to 0.4 mass%.
- 0.001 to 0.01% by mass of P is blended.
- the present invention is a solder joint for an electronic component having a solder alloy force as described above.
- the lead-free low-temperature solder of the present invention should contain Pb and Cd at all, the pollution problem is completely cleared.
- the lead-free low-temperature solder of the present invention has a solidus temperature of 85 ° C or higher and a liquidus temperature of around 100 ° C.
- the soldered part does not melt, and soldering can be performed at a temperature of 130 ° C or lower, so that low heat resistant parts are not thermally damaged.
- the lead-free low-temperature solder of the present invention has heat fatigue resistance, solderability, and mechanical properties required for solder, so that a reliable soldered portion can be formed.
- the low-temperature lead-free solder of the present invention is a Bi-In system, and when In is in the range of 48 to 52.5 mass%, there are many Biln intermetallic compounds in the structure of the low-temperature lead-free solder. To do become. Previously, such intermetallic compounds were recognized as brittle and not ductile, but Biln's intermetallic compounds are almost brittle, unlike other intermetallic compounds.
- the solder alloy composition that is useful in the present invention is in a region where the In content is lower than the so-called peritectic composition, and the In Bi intermetallic compound constituting the solder alloy of the present invention is an intermetallic compound.
- an actual alloy crystallizes Biln and Bi In as primary crystals during the solidification process
- Biln and Bi In which are brittle compounds, should be dispersed in highly ductile In Bi.
- the excellent characteristics used in the present invention are those exhibited only in an extremely narrow region of In: 48 mass% or more, 52.5 mass% or less, preferably 52.3 mass% or less. is there.
- Biln intermetallic compounds exist in the structure like the low-temperature lead-free solder of the present invention.
- the solidus temperature is preferably 87 ° C or higher and the liquidus temperature is preferably 90 ° C or lower.
- 50.0 to 52.0 mass% is suitable for In.
- plastic cache can be formed.
- Intergeneric compounds may be produced. These intermetallic compounds of Bi In and Biln are brittle.
- the Bi-In binary alloy of the present invention can perform soldering that satisfies the necessary conditions for soldering low heat resistant parts, but if better solderability is desired, Zn or La can be added to the binary alloy alone or simultaneously.
- the Zn added to the Bi-In alloy is less than 0.01% by mass, the effect of improving the wettability does not appear. However, if it exceeds 0.4% by mass, the liquidus temperature exceeds 120 ° C. The soldering temperature will also exceed 130 ° C.
- La added to the Bi-In alloy has the effect of supplementing the solder surface oxide film removal action by the flux, and if less than 0.01% by mass, the cohesiveness of the solder is reduced, However, if it is added more than 0.4% by mass, the liquidus temperature rises and exceeds the predetermined soldering temperature. Preferably, it is 0.05 mass% or more.
- the lead-free low-temperature solder of the present invention may contain 0.001 to 0.01 mass% of P for preventing corrosion under high temperature and high humidity.
- P is added to a Bi-In alloy, a Bi-In alloy, or an alloy in which Zn and La are added individually or simultaneously.
- the amount of P added is less than S0.001% by mass, the effect of preventing corrosion does not appear. If it exceeds 0.01% by mass, the liquidus temperature rises and solderability is improved. Will be harmful.
- Elongation Measure the elongation of the specimen after the tensile test in the above tensile strength test. If the elongation percentage of the solder is 10% or more, it becomes possible to produce a plastic sheath that forms a linear solder. Therefore, an elongation rate of 10% or more was accepted.
- a resin flux is printed on a ceramic plate with a thickness of 0.15mm and a diameter of 6.5mm.
- a 0.3mg piece of solder is placed on the ceramic plate and held at 80 to 85 ° C for 30 seconds. Hold at 100 ° C and 120 ° C for 40 seconds.
- the lead-free low-temperature solders of the present invention all have a solidus temperature of 87 ° C or higher and a liquidus temperature force of 10 ° C or lower. It was. Therefore, the lead-free low-temperature solder of the present invention has a low heat resistance because the soldering temperature can be set to 130 ° C or lower, which is the heat resistance temperature of the low heat resistant component, when soldering the low heat resistant component. The parts will not be thermally damaged or destroyed.
- the low-temperature lead-free solder of the present invention does not break at all even when subjected to a 90 ° bending test, and the tensile strength at 80 ° C is 8 Mpa or more. It has high reliability that it does not break easily even when the surrounding temperature becomes high.
- the lead-free low-temperature solder of the present invention has an elongation of 10% or more, it can be processed into a linear solder. Furthermore, since the lead-free low-temperature solder of the present invention has excellent wettability with respect to Cu electrodes and Au electrodes, it can be soldered without any soldering failure.
- the low-temperature lead-free solder of the present invention is an optimum bonding material for soldering an electronic component having a heat-resistant temperature of 130 ° C, for example, an electronic component incorporating a semiconductor element such as a Peltier element at a low temperature.
- an electronic component incorporating a semiconductor element such as a Peltier element at a low temperature.
- it can also be used for things that require joint strength, such as PPLP.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2006800342534A CN101267911B (zh) | 2005-08-18 | 2006-08-18 | 无铅低温焊料 |
US11/990,518 US8303735B2 (en) | 2005-08-18 | 2006-08-18 | Lead-free low-temperature solder |
JP2007531042A JP4831069B2 (ja) | 2005-08-18 | 2006-08-18 | 鉛フリー低温はんだ |
EP06796561.6A EP1930117B1 (en) | 2005-08-18 | 2006-08-18 | Lead-free low-temperature solder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-237036 | 2005-08-18 | ||
JP2005237036 | 2005-08-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007021006A1 true WO2007021006A1 (ja) | 2007-02-22 |
Family
ID=37757659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/316258 WO2007021006A1 (ja) | 2005-08-18 | 2006-08-18 | 鉛フリー低温はんだ |
Country Status (6)
Country | Link |
---|---|
US (1) | US8303735B2 (ja) |
EP (1) | EP1930117B1 (ja) |
JP (1) | JP4831069B2 (ja) |
KR (1) | KR20080048513A (ja) |
CN (2) | CN101934438A (ja) |
WO (1) | WO2007021006A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017216299A (ja) * | 2016-05-30 | 2017-12-07 | パナソニックIpマネジメント株式会社 | 回路部材の接続構造および接続方法 |
US11980974B2 (en) | 2018-11-16 | 2024-05-14 | Nihon Superior Co., Ltd. | Solder joint part and method for manufacturing the same |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5041102B2 (ja) * | 2009-09-04 | 2012-10-03 | 千住金属工業株式会社 | 鉛フリーはんだ合金、接合用部材及びその製造法、並びに電子部品 |
RU2477207C1 (ru) * | 2011-08-09 | 2013-03-10 | Открытое акционерное общество "Научно-исследовательский институт приборостроения имени В.В. Тихомирова" | Бессвинцовый припой |
JP6339070B2 (ja) | 2012-06-29 | 2018-06-06 | ジョンソン・アンド・ジョンソン・ビジョン・ケア・インコーポレイテッドJohnson & Johnson Vision Care, Inc. | 多重状態電気活性眼用装置 |
US20140191263A1 (en) | 2013-01-07 | 2014-07-10 | Sabic Innovative Plastics Ip B.V. | Compositions for an led reflector and articles thereof |
JP6187918B2 (ja) * | 2015-04-23 | 2017-08-30 | パナソニックIpマネジメント株式会社 | 回路部材の接続構造、接続方法および接続材料 |
CN105234579B (zh) * | 2015-10-21 | 2017-09-29 | 张家港市东大工业技术研究院 | 一种添加抗氧化颗粒的低熔点焊膏 |
JP6474008B2 (ja) * | 2017-03-29 | 2019-02-27 | パナソニックIpマネジメント株式会社 | 接続材料 |
JP6536968B2 (ja) * | 2017-07-20 | 2019-07-03 | パナソニックIpマネジメント株式会社 | 接続材料 |
CN112518167A (zh) * | 2018-04-04 | 2021-03-19 | 史国民 | 耐腐蚀低温焊接材料 |
JP6836040B1 (ja) | 2020-07-31 | 2021-02-24 | 千住金属工業株式会社 | はんだ合金 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001198692A (ja) | 2000-01-12 | 2001-07-24 | Matsushita Electric Ind Co Ltd | 光モジュールの接合材料およびこれを用いる光学ヘッド |
JP2002150906A (ja) * | 2000-11-08 | 2002-05-24 | Uchihashi Estec Co Ltd | 合金型温度ヒューズ |
JP2003013166A (ja) * | 2001-06-28 | 2003-01-15 | Sorudaa Kooto Kk | 温度ヒューズ用可溶性合金および温度ヒューズ用線材および温度ヒューズ |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6184475B1 (en) * | 1994-09-29 | 2001-02-06 | Fujitsu Limited | Lead-free solder composition with Bi, In and Sn |
DE4443459C2 (de) * | 1994-12-07 | 1996-11-21 | Wieland Werke Ag | Bleifreies Weichlot und seine Verwendung |
CN1445049A (zh) * | 2002-03-19 | 2003-10-01 | 日本胜利株式会社 | 焊锡膏、焊接成品及焊接方法 |
CN1570166A (zh) * | 2004-05-09 | 2005-01-26 | 邓和升 | 无铅焊料合金及其制备方法 |
US20060067852A1 (en) | 2004-09-29 | 2006-03-30 | Daewoong Suh | Low melting-point solders, articles made thereby, and processes of making same |
EP1916313B1 (en) | 2005-08-02 | 2016-06-15 | Senju Metal Industry Co., Ltd. | Sprinkler head |
-
2006
- 2006-08-18 KR KR1020087007514A patent/KR20080048513A/ko active Search and Examination
- 2006-08-18 CN CN2010102712407A patent/CN101934438A/zh active Pending
- 2006-08-18 JP JP2007531042A patent/JP4831069B2/ja active Active
- 2006-08-18 WO PCT/JP2006/316258 patent/WO2007021006A1/ja active Application Filing
- 2006-08-18 CN CN2006800342534A patent/CN101267911B/zh active Active
- 2006-08-18 US US11/990,518 patent/US8303735B2/en active Active
- 2006-08-18 EP EP06796561.6A patent/EP1930117B1/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001198692A (ja) | 2000-01-12 | 2001-07-24 | Matsushita Electric Ind Co Ltd | 光モジュールの接合材料およびこれを用いる光学ヘッド |
JP2002150906A (ja) * | 2000-11-08 | 2002-05-24 | Uchihashi Estec Co Ltd | 合金型温度ヒューズ |
JP2003013166A (ja) * | 2001-06-28 | 2003-01-15 | Sorudaa Kooto Kk | 温度ヒューズ用可溶性合金および温度ヒューズ用線材および温度ヒューズ |
Non-Patent Citations (1)
Title |
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See also references of EP1930117A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017216299A (ja) * | 2016-05-30 | 2017-12-07 | パナソニックIpマネジメント株式会社 | 回路部材の接続構造および接続方法 |
US11980974B2 (en) | 2018-11-16 | 2024-05-14 | Nihon Superior Co., Ltd. | Solder joint part and method for manufacturing the same |
Also Published As
Publication number | Publication date |
---|---|
KR20080048513A (ko) | 2008-06-02 |
EP1930117B1 (en) | 2017-05-17 |
EP1930117A1 (en) | 2008-06-11 |
CN101267911A (zh) | 2008-09-17 |
CN101934438A (zh) | 2011-01-05 |
EP1930117A4 (en) | 2009-03-11 |
JPWO2007021006A1 (ja) | 2009-02-26 |
CN101267911B (zh) | 2010-12-08 |
US20100015004A1 (en) | 2010-01-21 |
JP4831069B2 (ja) | 2011-12-07 |
US8303735B2 (en) | 2012-11-06 |
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