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LED solder alloy with good ductility and high corrosion resistance

A technology of solder alloy and ductility, applied in the direction of welding/cutting medium/material, welding medium, manufacturing tools, etc., can solve problems such as solder instability, improve stability, improve corrosion resistance and high temperature resistance, and improve turtle cracking effect

Active Publication Date: 2015-04-22
YIK SHING TAT INDUSTRIALCO LTD +1
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  • Description
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Problems solved by technology

[0003] The invention provides a high-temperature solder with rare earth metal added, which solves the technical problem of solder instability in the high-temperature state in the prior art

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  • LED solder alloy with good ductility and high corrosion resistance

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Embodiment Construction

[0008] Specific embodiments of the present invention are described in detail below.

[0009] This highly ductile, corrosion-resistant LED solder alloy contains scandium and tantalum in addition to tin and lead. The inventor has been engaged in solder research for many years, and found in many years of production practice that during the LED welding process, when adjacent points are welded, it has a great influence on other solder joints. Repeated melting of solder joints and prolonged cooling time can easily cause solder joints. The phenomenon of spot welding and solder joint cracks, although the cracks are very small, has a very large impact on product quality. The inventor has made statistics and found that the quality problems caused by cracks account for about 20% of welding quality problems. %, therefore, improving the ductility of the solder becomes the key to solving the problem. The inventor started with the addition of rare earth metals and carried out tests for many...

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Abstract

The invention relates to LED solder alloy with good ductility and high corrosion resistance. The main components of the alloy comprise tin, lead, scandium and tantalum, wherein the lead accounts for 30-60% of the total; the scandium accounts for 1-5% of the total; and the tantalum accounts for 2-5% of the total. According to the invention, a rare earth metal adding method is adopted; cracking phenomenon is obviously ameliorated; product stability is improved; and abilities of anticorrosion and high temperature resistance of the solder are improved.

Description

technical field [0001] The invention relates to soldering materials, in particular to solders for LED soldering. Background technique [0002] During LED welding, because LEDs are generally arranged densely, especially for SMD LEDs, the welding of one point has a great impact on adjacent solder joints. Therefore, the requirements for solder are relatively high and must have high stability. At present, LED solders generally use tin-lead as the main component. Under high temperature conditions, the stability and ductility are relatively poor. The solder is not very stable, and it is easy to cause remelting and cracking. Contents of the invention [0003] The invention provides a high-temperature solder added with rare earth metals, which solves the technical problem of solder instability in the high-temperature state in the prior art. [0004] The main components of the high-temperature solder provided by the present invention to solve the above technical problems include t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/26
Inventor 徐金华吴秋霞马鑫吴建新王宏芹王玲万超
Owner YIK SHING TAT INDUSTRIALCO LTD
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