JP3829475B2 - Solder composition for joining a Cu base material - Google Patents
Solder composition for joining a Cu base material Download PDFInfo
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- JP3829475B2 JP3829475B2 JP15072598A JP15072598A JP3829475B2 JP 3829475 B2 JP3829475 B2 JP 3829475B2 JP 15072598 A JP15072598 A JP 15072598A JP 15072598 A JP15072598 A JP 15072598A JP 3829475 B2 JP3829475 B2 JP 3829475B2
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Description
【0001】
【発明の属する技術分野】
本願発明は、電子機器や電子部品用のはんだ組成物に関するものであり、特に、エナメル被覆銅線の被覆剥離とはんだ付けの両方を同時に行う場合に用いるのに適したはんだ組成物に関する。
【0002】
【従来の技術】
従来、コイル部品などの製造工程においては、巻線コイルのエナメル線被覆剥離とはんだ付けの両方を同時に実施することが行われており、そのような場合、Pb含有率の高いSn−Pb系はんだを、400℃以上の高温で使用することが一般的に行われてきた。
【0003】
【発明が解決しようとする課題】
しかし、従来のSn−Pb系はんだは、毒性を有するPbを含んでいるため、その使用が制限されつつある。
【0004】
そのため、近年は、Sn−Pb系はんだに代わる、いわゆるPbフリーはんだ(無鉛はんだ)が市場に流通しつつあるが、そのほとんどがSnを主成分とするものであり、巻線コイルのエナメル線被覆剥離とはんだ付けの両方を同時に行うと、Cu線がはんだに溶解する、いわゆるCu線喰われの現象が発生するという問題点がある。
【0005】
本願発明は、上記問題点を解決するものであり、はんだ付性と、Cu線喰われ性(耐Cu線喰われ性)に関し、従来のSn−Pb系はんだと少なくとも同等の特性を有する、Cu系母材接合用の無鉛はんだを提供することを目的としている。
【0006】
【課題を解決するための手段】
上記目的を達成するために、本願発明のCu系母材接合用のはんだ組成物は、
Sn、Bi及びCuの3成分からなり、前記3成分が下記の割合で配合されていることを特徴としている。
Sn:5.0〜90.0重量%
Bi:5.0〜92.0重量%
Cu:0.1重量%以上で、かつ、下記の式(1)及び(2)の要件を満たす範囲
Cu添加量(重量%)≦(0.06×Sn量)−0.02 ……(1)
Cu添加量(重量%)≧(0.06×Sn量)−3.4 ……(2)
【0007】
SnとBiを主成分とし、これにさらにCuを、上記の割合で配合することにより、Pbを含まず、安全性に優れており、かつ、はんだ付性と、Cu線喰われ性に関し、従来のSn−Pb系はんだと同等の特性を有する、Cu系母材接合用のはんだを得ることが可能になる。
【0008】
なお、Snの配合割合を5.0〜90.0重量%の範囲としたのは、Snの配合割合が5.0重量%未満になるとはんだ付性が低下し、90重量%を超えるとCu線喰われが発生しやすくなることによる。
【0009】
また、Biの配合割合を5.0〜92.0重量%の範囲としたのは、Biの配合割合が5.0重量%未満になると、必然的にSnの配合割合が増えてCu線喰われが発生しやすくなり、逆に、Biの配合割合が92重量%を超えると、必然的にSnの配合割合が減少してはんだ付性が低下することによる。
【0010】
また、Cuを、0.1重量%以上で、上記の式(1)及び(2)の要件を満たす範囲としたのは以下の理由による。すなわち、Cuの添加割合が0.1重量%未満になると、Cu線喰われを抑制する効果が不十分になり、また、上記の式(1)の要件を満たさない場合には、はんだ融点が400℃を超え、事実上使用することができなくなり、さらに、上記の式(2)の要件を満たさない場合には、Cu線喰われを抑制することができなくなることによる。
【0011】
なお、Snの配合割合と関連して、式(1)及び式(2)により規定される、本願発明のCu系母材接合用のはんだ組成物中のCuの配合割合を図1に示す。図1の、点A,B,C,Dで囲まれた領域が請求項1のはんだ組成物におけるCuの配合割合である。
【0012】
また、請求項2のCu系母材接合用のはんだ組成物は、請求項1記載のCu系母材接合用のはんだ組成物において、Sn、Bi及びCuが、下記の割合で配合されていることを特徴としている。
Sn:14.8〜42.0重量%
Bi:57.0〜85.0重量%
Cu:0.1重量%以上であって、かつ、前記請求項1の式(1)及び(2)の要件を満たす範囲
【0013】
Sn、Bi、及びCuを、請求項1よりもさらに限定された上記の割合で配合することにより、Pbを含まず、安全性に優れており、かつ、はんだ付性と耐Cu線喰われ性に関し、優れた特性を有するCu系母材接合用のはんだ組成物を確実に得ることが可能になる。
【0014】
また、請求項3のCu系母材接合用のはんだ組成物は、Sn、Bi、Cu及びAgの4 成分からなり、前記4成分が下記の割合で配合されていることを特徴としている。
Sn:14.8〜42.0重量%
Bi:57.0〜85.0重量%
Cu:0.1重量%以上で、かつ、下記の式 (1) 及び (2) の要件を満たす範囲
Cu添加量(重量%)≦(0.06×Sn量)−0.02 …… (1)
Cu添加量(重量%)≧(0.06×Sn量)−3.4 …… (2)
Ag: 0〜0.5重量%
【0015】
上記(請求項2)のCu系母材接合用のはんだ組成物に、さらに、Agを0.5重量%の以下の割合で配合することにより、Pbを含まず、安全性に優れており、かつ、はんだ付性と、Cu線喰われ性に関し、さらに優れた特性を有する、Cu系母材接合用のはんだ組成物を得ることが可能になる。
【0016】
なお、Agは、はんだ付性やはんだの機械的な強度の向上に寄与する。
【0017】
【発明の実施の形態】
以下、本願発明の実施の形態を示して、その特徴とするところをさらに詳しく説明する。
【0018】
なお、この実施形態においては、表1に示すような組成のはんだ組成物を作製した。
【0019】
【表1】
【0020】
表1の、試料番号2,4,5,7,8,10は、本願発明の範囲内のはんだ組成物(実施例)である。
また、*を付した試料番号1,3,6,9、及び試料番号11,12,13,14は、本願発明の範囲外の比較例であって、そのうち、試料番号1,3,6,9は、構成成分が本願発明のはんだ組成物と同じで、配合割合が本願発明の範囲外のものであり、また、試料番号11,12,13,14は、構成成分のうち、Bi、又はCuを含まないものである。なお、試料番号11は、Pbを含む従来のPb−Sn系はんだである。
【0021】
そして、これらの各試料(はんだ組成物)を用いて、エナメル線をはんだ付けし、Cu線喰われ性とはんだ付き性を調べた。
なお、Cu線喰われ性については、直径0.08mmのエナメル被覆Cu線を、400℃のはんだ浴に浸漬したときに、Cu線が消失するまでに経過した時間(Cu線喰われ時間)を測定し、評価した
なお、Cu線喰われ時間が長くなるほど、Cu線喰われの抑制効果が高いと評価される。
【0022】
また、はんだ付性については、400℃における清浄Cu板に対するはんだ濡れ性をメニスコグラフ法におけるゼロクロスタイムで評価した。
ゼロクロスタイムが短いほどはんだ濡れ性が良好と評価される。
なお、はんだ付けには、RMAタイプのフラックスを使用した。
【0023】
Cu線喰われ性及びはんだ付性についての測定(評価)結果を、表1に併せて示す。
表1に示すように、式(1)の条件を満たしていない試料番号1と6については、融点が400℃以上で、通常のはんだ付け温度では、はんだが溶融せず、測定が不可能であった。
【0024】
また、式(2)の条件を満たしていない試料番号3については、Cu線喰われ時間が10秒以下となり、Cu線喰われ性(すなわち、Cu線喰われの抑制効果)に関し、満足な結果が得られなかった。
【0025】
また、試料番号9については、Snの配合割合が本願発明の範囲より小さく、Biの配合割合が本願発明の範囲を超えているため、Cu線喰われ性(すなわち、Cu線喰われの抑制効果)については満足な結果が得られたが、ゼロクロスタイムが1秒以上と長く、十分なはんだ濡れ性を得ることができなかった。
【0026】
これに対して、Sn、Biが本願発明の範囲内にあり、かつ式(1)及び(2)の条件を満たす、試料番号2,4,5,7,8については、Cu線喰われ性、はんだ付性とも、従来から使用されているSn−Pb系はんだと同等の性能が得られた。
【0027】
また、本願発明の範囲にあるSn−Bi−Cu系のはんだ組成物にAgを添加した試料番号10についても、Cu線喰われ性やはんだ付性が損なわれることはなく、Sn−Pb系はんだと同等の性能が得られた。
【0028】
また、表1には示していないが、本願発明の範囲にあるSn−Bi−Cu系のはんだ組成物に、In、Zn、Sb、Ge、Pの1種以上を添加した場合にも、Cu線喰われ性やはんだ付性が損なわれることはなく、Sn−Pb系はんだと同等の性能が得られることが確認されている。
【0029】
なお、本願発明は、上記実施形態に限定されるものではなく、発明の要旨の範囲内において、種々の応用、変形を加えることが可能である。
【0030】
【発明の効果】
上述のように、本願発明(請求項1)のCu系母材接合用のはんだ組成物は、SnとBiを主成分とし、これにさらにCuを、所定の割合で配合することにより、Pbを含まず、安全性に優れており、かつ、はんだ付性やCu線喰われ性に関し、従来のSn−Pb系はんだと同等の特性を有する、Cu系母材接合用のはんだを得ることができる。
【0031】
また、請求項2のCu系母材接合用のはんだ組成物のように、Sn、Bi、及びCuを、請求項1よりもさらに限定された割合で配合することにより、はんだ付性と耐Cu線喰われ性に関し、優れた特性を有する、Cu系母材接合用のはんだ組成物を確実に得ることが可能になり、本願発明をさらに実効あらしめることができる。
【0032】
また、請求項3のCu系母材接合用のはんだ組成物のように、本願発明(請求項2)のはんだ組成物に、さらに、Agを0.5重量%の以下の割合で配合することにより、機械的な強度の向上、はんだの融点の制御、はんだの酸化被膜の抑制などを図ることが可能になり、さらに特性を向上させることが可能になる。
【図面の簡単な説明】
【図1】 本願発明のはんだ組成物中の、Snの配合割合に対するCuの配合割合の関係を示す図である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a solder composition for electronic devices and electronic components, and more particularly to a solder composition suitable for use in the case where both coating peeling and soldering of enamel-coated copper wires are performed simultaneously.
[0002]
[Prior art]
Conventionally, in the manufacturing process of coil parts and the like, both the enamel wire coating peeling and the soldering of the winding coil have been performed at the same time. In such a case, Sn-Pb solder having a high Pb content is used. Has been generally used at a high temperature of 400 ° C. or higher.
[0003]
[Problems to be solved by the invention]
However, since conventional Sn—Pb solder contains toxic Pb, its use is being limited.
[0004]
Therefore, in recent years, so-called Pb-free solder (lead-free solder), which replaces Sn-Pb solder, has been distributed in the market. When both peeling and soldering are performed simultaneously, there is a problem that a so-called Cu wire erosion phenomenon occurs in which the Cu wire is dissolved in the solder.
[0005]
The present invention is intended to solve the above problems, has a solderability, Cu lines leach resistance relates (resistance Cu wire leach resistance), the conventional Sn-Pb based solder and at least comparable properties, Cu The object is to provide a lead-free solder for joining a base material .
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the solder composition for joining a Cu-based base material of the present invention comprises:
It consists of three components of Sn, Bi, and Cu , and the three components are blended in the following proportions .
Sn: 5.0-90.0% by weight
Bi: 5.0-92.0% by weight
Cu: 0.1% by weight or more and a range satisfying the requirements of the following formulas (1) and (2) Cu addition amount (% by weight) ≦ (0.06 × Sn amount) −0.02 1)
Cu addition amount (% by weight) ≧ (0.06 × Sn amount) −3.4 (2)
[0007]
By containing Sn and Bi as main components and further adding Cu in the above proportion, it does not contain Pb, is excellent in safety, and is related to solderability and Cu wire erosion. Thus, it is possible to obtain a solder for joining a Cu-based base material having the same characteristics as those of the Sn—Pb-based solder.
[0008]
In addition, the mixing ratio of Sn was set to a range of 5.0 to 90.0% by weight because when the mixing ratio of Sn is less than 5.0% by weight, the solderability is lowered, and when it exceeds 90% by weight, Cu is Cu. This is because wire erosion tends to occur.
[0009]
Also, the Bi blending ratio is in the range of 5.0 to 92.0% by weight because when the Bi blending ratio is less than 5.0% by weight, the Sn blending ratio inevitably increases and Cu wire erosion occurs. On the contrary, when the Bi content exceeds 92% by weight, the Sn content is inevitably reduced and solderability is lowered.
[0010]
Moreover, Cu was made into the range which satisfy | fills the requirements of said formula (1) and (2) at 0.1 weight% or more for the following reasons. That is, when the addition ratio of Cu is less than 0.1% by weight, the effect of suppressing Cu wire erosion becomes insufficient, and when the requirement of the above formula (1) is not satisfied, the solder melting point is This is because the temperature exceeds 400 ° C. and it cannot practically be used. Further, when the requirement of the above formula (2) is not satisfied, Cu wire erosion cannot be suppressed.
[0011]
In addition, in relation to the mixing ratio of Sn, the mixing ratio of Cu in the solder composition for joining a Cu-based base material of the present invention, defined by the formulas (1) and (2), is shown in FIG. The area surrounded by points A, B, C, and D in FIG. 1 is the Cu mixing ratio in the solder composition of claim 1.
[0012]
Moreover, the solder composition for joining a Cu-based base material according to claim 2 is the solder composition for joining a Cu-based base material according to claim 1, wherein Sn, Bi and Cu are blended in the following proportions . It is characterized by that.
Sn: 14.8 to 42.0% by weight
Bi: 57.0-85.0% by weight
Cu: 0.1% by weight or more and a range satisfying the requirements of the formulas (1) and (2) of claim 1
By blending Sn, Bi, and Cu in the above-mentioned proportions more limited than in claim 1, it does not contain Pb, is excellent in safety, and has solderability and Cu wire erosion resistance. In this regard, it is possible to reliably obtain a solder composition for joining a Cu-based base material having excellent characteristics.
[0014]
The solder composition for joining a Cu-based base material according to claim 3 is composed of four components of Sn, Bi, Cu, and Ag, and the four components are blended in the following proportions.
Sn: 14.8 to 42.0% by weight
Bi: 57.0-85.0% by weight
Cu: 0.1 wt% or more and a range satisfying the requirements of the following formulas (1) and (2)
Cu addition amount (% by weight) ≦ (0.06 × Sn amount) −0.02 (1)
Cu addition amount (% by weight) ≧ (0.06 × Sn amount) −3.4 (2)
Ag: 0 to 0.5% by weight
[0015]
In the solder composition for joining the Cu-based base material of the above (Claim 2) , by further adding Ag in the following proportion of 0.5% by weight , it does not contain Pb and is excellent in safety. And it becomes possible to obtain the solder composition for Cu type | system | group base material joining which has the further outstanding characteristic regarding solderability and Cu wire erosion property.
[0016]
Incidentally, A g contributes to the upper direction of the mechanical strength with resistance and soldering of the solder.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be shown, and the features thereof will be described in more detail.
[0018]
In this embodiment, a solder composition having the composition shown in Table 1 was produced.
[0019]
[Table 1]
[0020]
Sample numbers 2, 4, 5, 7, 8, and 10 in Table 1 are solder compositions (Examples) within the scope of the present invention.
Sample numbers 1, 3, 6, and 9 and sample numbers 11, 12, 13, and 14 marked with * are comparative examples outside the scope of the present invention. No. 9 is the same as the solder composition of the present invention and the blending ratio is outside the scope of the present invention. Sample Nos. 11, 12, 13, and 14 are Bi or It does not contain Cu. Sample number 11 is a conventional Pb—Sn solder including Pb.
[0021]
And using these each sample (solder composition), the enamel wire was soldered and Cu wire erosion property and solderability were investigated.
In addition, about the Cu wire erosion property, the time (Cu wire erosion time) elapsed until the Cu wire disappeared when the enamel-coated Cu wire having a diameter of 0.08 mm was immersed in a 400 ° C. solder bath. It measured and evaluated In addition, it is evaluated that the suppression effect of Cu wire erosion is so high that Cu wire erosion time becomes long.
[0022]
Moreover, about solderability, the solder wettability with respect to the clean Cu board in 400 degreeC was evaluated by the zero cross time in a menisograph method.
The shorter the zero cross time, the better the solder wettability.
For soldering, RMA type flux was used.
[0023]
Table 1 also shows the measurement (evaluation) results for Cu wire erosion and solderability.
As shown in Table 1, for sample numbers 1 and 6 that do not satisfy the condition of formula (1), the melting point is 400 ° C. or higher, and the solder does not melt at the normal soldering temperature, making measurement impossible. there were.
[0024]
Moreover, about the sample number 3 which does not satisfy | fill the conditions of Formula (2), Cu wire erosion time will be 10 second or less, and it is a satisfactory result regarding Cu wire erosion property (namely, suppression effect of Cu wire erosion). Was not obtained.
[0025]
Moreover, about the sample number 9, since the mixture ratio of Sn is smaller than the range of this invention, and the mixture ratio of Bi exceeds the range of this invention, Cu wire erosion property (namely, Cu wire erosion suppression effect) However, satisfactory results were obtained, but the zero cross time was as long as 1 second or more, and sufficient solder wettability could not be obtained.
[0026]
On the other hand, for sample numbers 2, 4, 5, 7, and 8 where Sn and Bi are within the scope of the present invention and satisfy the conditions of formulas (1) and (2), Cu wire erosion As for the solderability, the same performance as that of the Sn-Pb solder used conventionally is obtained.
[0027]
In addition, with respect to Sample No. 10 in which Ag is added to the Sn—Bi—Cu based solder composition within the scope of the present invention, the Cu wire erosion property and the solderability are not impaired, and the Sn—Pb based solder The equivalent performance was obtained.
[0028]
In addition, although not shown in Table 1, even when one or more of In, Zn, Sb, Ge, and P are added to the Sn—Bi—Cu based solder composition within the scope of the present invention, Cu It has been confirmed that the wire erosion property and the solderability are not impaired and the performance equivalent to that of the Sn—Pb solder is obtained.
[0029]
Note that the present invention is not limited to the above-described embodiment, and various applications and modifications can be made within the scope of the gist of the invention.
[0030]
【The invention's effect】
As described above, the solder composition for joining a Cu-based base material of the present invention (Claim 1) is composed mainly of Sn and Bi, and further Cu is added at a predetermined ratio to thereby add Pb. Cu-based base material joining solder that is excellent in safety and has the same characteristics as conventional Sn-Pb solder in terms of solderability and Cu wire erosion can be obtained. .
[0031]
Moreover, like the solder composition for joining a Cu-based base material according to claim 2, Sn, Bi, and Cu are blended at a more limited ratio than that of claim 1, so that solderability and Cu resistance are improved. With respect to the wire erosion property, it becomes possible to reliably obtain a solder composition for joining a Cu-based base material , which has excellent characteristics, and the present invention can be further effectively clarified.
[0032]
Further, like the solder composition for joining a Cu-based base material according to claim 3 , Ag is further blended in the solder composition of the present invention (claim 2 ) at a ratio of 0.5% by weight or less. Thus, it is possible to improve the mechanical strength, control the melting point of the solder, suppress the oxide film of the solder, and the like, and further improve the characteristics.
[Brief description of the drawings]
FIG. 1 is a diagram showing the relationship of the proportion of Cu with respect to the proportion of Sn in the solder composition of the present invention.
Claims (3)
Sn:5.0〜90.0重量%
Bi:5.0〜92.0重量%
Cu:0.1重量%以上で、かつ、下記の式(1)及び(2)の要件を満たす範囲
Cu添加量(重量%)≦(0.06×Sn量)−0.02 ……(1)
Cu添加量(重量%)≧(0.06×Sn量)−3.4 ……(2) A solder composition for joining a Cu-based base material , comprising three components of Sn, Bi and Cu , wherein the three components are blended in the following proportions.
Sn: 5.0-90.0% by weight
Bi: 5.0-92.0% by weight
Cu: 0.1% by weight or more and a range satisfying the requirements of the following formulas (1) and (2) Cu addition amount (% by weight) ≦ (0.06 × Sn amount) −0.02 1)
Cu addition amount (% by weight) ≧ (0.06 × Sn amount) −3.4 (2)
Sn:14.8〜42.0重量%
Bi:57.0〜85.0重量%
Cu:0.1重量%以上で、かつ、前記式(1)及び(2)の要件を満たす範囲 The solder composition for joining a Cu-based base material according to claim 1, wherein Sn, Bi and Cu are blended in the following ratio.
Sn: 14.8 to 42.0% by weight
Bi: 57.0-85.0% by weight
Cu: 0.1% by weight or more and a range satisfying the requirements of the above formulas (1) and (2)
Sn:14.8〜42.0重量% Sn: 14.8 to 42.0% by weight
Bi:57.0〜85.0重量% Bi: 57.0-85.0% by weight
Cu:0.1重量%以上で、かつ、下記の式 Cu: 0.1% by weight or more and the following formula (1)(1) 及びas well as (2)(2) の要件を満たす範囲To meet the requirements of
Cu添加量(重量%)≦(0.06×Sn量)−0.02 …… Cu addition amount (% by weight) ≦ (0.06 × Sn amount) −0.02 (1)(1)
Cu添加量(重量%)≧(0.06×Sn量)−3.4 …… Cu addition amount (% by weight) ≧ (0.06 × Sn amount) −3.4 (2)(2)
Ag: 0〜0.5重量% Ag: 0 to 0.5% by weight
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15072598A JP3829475B2 (en) | 1998-05-13 | 1998-05-13 | Solder composition for joining a Cu base material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15072598A JP3829475B2 (en) | 1998-05-13 | 1998-05-13 | Solder composition for joining a Cu base material |
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JPH11320177A JPH11320177A (en) | 1999-11-24 |
JP3829475B2 true JP3829475B2 (en) | 2006-10-04 |
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JP15072598A Expired - Lifetime JP3829475B2 (en) | 1998-05-13 | 1998-05-13 | Solder composition for joining a Cu base material |
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Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4338854B2 (en) * | 1999-11-25 | 2009-10-07 | 三井金属鉱業株式会社 | Tin-bismuth lead-free solder |
JP3671815B2 (en) * | 2000-06-12 | 2005-07-13 | 株式会社村田製作所 | Solder composition and soldered article |
US20030091463A1 (en) * | 2001-02-27 | 2003-05-15 | Koichi Izumida | Unleaded solder alloy and electronic components using it |
EP1399600B1 (en) * | 2001-05-28 | 2007-01-17 | Honeywell International Inc. | Compositions, methods and devices for high temperature lead-free solder |
US7005106B2 (en) * | 2001-08-30 | 2006-02-28 | Sumida Corporation | Lead-free solder alloy and electronic components using it |
TW504427B (en) * | 2001-09-25 | 2002-10-01 | Honeywell Int Inc | Composition, methods and devices for high temperature lead-free solder |
DE10147378A1 (en) * | 2001-09-26 | 2003-02-20 | Infineon Technologies Ag | Soft solder, especially electronic solder used in the production of electronic and semiconductor components, contains bismuth, silver, and copper as alloying components |
US7172726B2 (en) * | 2002-10-15 | 2007-02-06 | Senju Metal Industry Co., Ltd. | Lead-free solder |
DE10319888A1 (en) | 2003-04-25 | 2004-11-25 | Siemens Ag | Solder material based on SnAgCu |
KR100756134B1 (en) * | 2004-04-21 | 2007-09-05 | 닛본 덴끼 가부시끼가이샤 | Solder and mounted article using same |
JP5067163B2 (en) * | 2005-11-11 | 2012-11-07 | 千住金属工業株式会社 | Solder paste and solder joint |
JP2009125769A (en) * | 2007-11-21 | 2009-06-11 | Nec Lighting Ltd | Solder, external electrode type fluorescent lamp, and liquid crystal display device |
CN101332544A (en) * | 2008-05-28 | 2008-12-31 | 广州瀚源电子科技有限公司 | High-melting point lead-free solder and production technique thereof |
JP5194326B2 (en) * | 2008-12-27 | 2013-05-08 | 千住金属工業株式会社 | Bi-Sn reel-wound solder wire and method for manufacturing solder wire |
JP5716332B2 (en) * | 2010-09-22 | 2015-05-13 | 住友金属鉱山株式会社 | Pb-free solder alloy |
CN102492870B (en) * | 2011-12-13 | 2014-11-05 | 厦门大学 | Tin bismuth copper silver alloy dispersed composite powder for electronic packaging and preparation method for tin bismuth copper silver alloy dispersed composite powder |
US20150037087A1 (en) | 2013-08-05 | 2015-02-05 | Senju Metal Industry Co., Ltd. | Lead-Free Solder Alloy |
JP6101908B2 (en) * | 2014-07-09 | 2017-03-29 | 内橋エステック株式会社 | Fusible alloy for thermal fuse, wire for thermal fuse and thermal fuse |
JP2017094368A (en) * | 2015-11-26 | 2017-06-01 | 株式会社リソー技研 | Solder for enamel-coated electric cable, and soldering method for enamel-coated electric cable |
JP6730833B2 (en) * | 2016-03-31 | 2020-07-29 | 株式会社タムラ製作所 | Solder alloy and solder composition |
CN111132794B (en) * | 2018-08-31 | 2021-08-17 | Jx金属株式会社 | Solder alloy |
US11267080B2 (en) | 2019-05-09 | 2022-03-08 | Indium Corporation | Low temperature melting and mid temperature melting lead-free solder paste with mixed solder alloy powders |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2547048B2 (en) * | 1987-12-01 | 1996-10-23 | 内橋エステック株式会社 | Cream solder |
US5368814A (en) * | 1993-06-16 | 1994-11-29 | International Business Machines, Inc. | Lead free, tin-bismuth solder alloys |
JP2681742B2 (en) * | 1993-07-28 | 1997-11-26 | 株式会社日本スペリア社 | Lead-free solder alloy |
JPH08132277A (en) * | 1994-11-01 | 1996-05-28 | Ishikawa Kinzoku Kk | Leadless solder |
JP3963501B2 (en) * | 1996-06-12 | 2007-08-22 | 内橋エステック株式会社 | Electronic component mounting method |
JP3425332B2 (en) * | 1997-07-10 | 2003-07-14 | 松下電器産業株式会社 | Electronic component electrode material and electronic component electrode manufacturing method |
JP3761678B2 (en) * | 1997-07-17 | 2006-03-29 | 松下電器産業株式会社 | Tin-containing lead-free solder alloy, cream solder thereof, and manufacturing method thereof |
JP3815865B2 (en) * | 1997-09-02 | 2006-08-30 | 千住金属工業株式会社 | Lead-free solder alloy |
JPH11221694A (en) * | 1998-02-06 | 1999-08-17 | Hitachi Ltd | Packaging structural body using lead-free solder and packaging method using the same |
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1998
- 1998-05-13 JP JP15072598A patent/JP3829475B2/en not_active Expired - Lifetime
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