White Papers

Indium Corporation conducts extensive research on the soldering fundamentals for Surface Mount Technology and other electronics applications.

Browse our library for abstracts of some of the most popular published articles that you may find useful in your efforts to improve your process results. All papers in our library are available for download.

Check the box next to each paper you want to download. You may download as many papers as you wish. After selecting papers and completing the contact information form on this page, the paper(s) will be e-mailed to you at the e-mail address you provide.

    Papers about indium

  • Availability of Indium and Gallium (Chinese)

    by Claire Mikolajczak, Bill Jackson

    Chinese version of Availability of Indium and Gallium

    CHINESE LANGUAGE, gallium extraction process, gallium mining, reclaiming ITO targets, indium refining capacities, tailings, slag, indium residues, indium, gallium, availability of indium and gallium, indium ores and mining, indium extraction

    Posted on 22 May 2012

  • Availability of Indium and Gallium (English)

    by Bill Jackson, Claire Mikolajczak

    “Long term, both indium and gallium will be available with intermittent price volatility.” — Claire Mikolajczak

    indium extraction, indium ores and mining, availability of indium and gallium, gallium, indium, indium residues, slag, tailings, indium refining capacities, reclaiming ITO targets, gallium mining, gallium extraction process

    Posted on 23 Apr 2012

  • Availability of Indium and Gallium (German)

    by Claire Mikolajczak

    German language version of Availability of Indium and Gallium.

    Copper Indium Gallium, CIG, German language, indium, solar, thin film technology

    Posted on 11 Mar 2010

  • Lead-Free Soldering and Low Alpha Solders for Wafer Level Interconnects

    by Dr. Ning-Cheng Lee

    Lead-free soldering, originally started as an environmental issue, is evolving rapidly into a business survival tool for the worldwide electronic industry. Promising lead-free solder alternatives for surface mount assembly applications include eutectic Sn/Ag, eutectic Sn/Cu, Sn95/Sb5, eutectic Sn/Bi, Sn/Ag/Cu, Sn/Ag/Cu/X, Sn/Bi/Ag/X, Sn/Zn/X, and Sn/In/Ag/(X). However, for wafer level area array solder bump interconnects, most of those options fall short in terms of fatigue resistance. Sn/In/Ag/(X) appears to be superior when compared with Sn63/Pb37, as demonstrated by Sn/In/Ag/Cu. For applications involving high lead solders, no solder alternatives have been developed yet. While the industry is advancing toward being finer, smaller, lighter, and faster, wafer level packages using area array solder interconnects is suffering from the soft error due to alpha emission from the lead in the solders. Although lead-free solder alternatives for eutectic Sn/Pb are virtually free from alpha emission, the continuous dependence on the use of high-lead solders for C4 applications indicates that the challenge of alpha emission from lead-containing solders will persist regardless of the lead-free move of the industry. This challenge is getting tougher with the rapid advancement of IC design toward further miniaturization. Low alpha lead can be obtained from cold lead ore, old lead, and laser isotope separation process, with the latter having potential as a long term solution. The price of those low alpha lead is very expensive when compared with the regular lead. Due to the increase in I/O density, requirement on alpha emission level may soon move from LC2 to LC3 level. The supply of low alpha lead for wafer level interconnects does not seem to be an issue.

    lead-free, solder, soldering, wafer level interconnect, Flip Chip, CSP, BGA, alpha emission, low alpha solders, soft error, indium, pb-free

    Posted on 1 Jan 2009

  • Sustainability of Indium and Gallium Supplies in the Face of Emerging Markets

    by Michael D Murphy, Claire Mikolajczak

    The elements indium and gallium are key components in the manufacture of products in high volume emerging markets. The strategic nature of these elements, coupled with some published reports concerning shortages, has raised some legitimate questions about the sustainability of their supply chains. Indium Corporation has studied these markets as well as the mining and refining operations in detail. In this paper, we intend to answer these questions.

    CIG, ITO, FPD, metal supply, gallium, indium, SVC Tech Con 2011

    Posted on 19 Apr 2011

  • The Long-Term Supply of Indium and Gallium

    by Claire Mikolajczak, Greg Phipps, Terry Guckes

    indium, gallium, metal supply

    Posted on 10 Mar 2010

  • Virtues of Indium as a Thermal Interface Material

    by Amanda Hartnett, Dr. Ronald C. Lasky

    The element indium is an ideal thermal interface material (TIM) for heat dissipation in many of today’s very fast, very hot integrated circuits. Its key advantage is its high bulk thermal conductivity, but other attributes include a low tensile strength and indium’s ability to lower melting temperatures when alloyed with other elements.

    TIM, indium

    Posted on 10 Mar 2010

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