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Research paper thumbnail of Bi-Ag as an Alternative High Temperature Solder

The search for a high temperature lead-free solder replacement for high temperature leaded solder... more The search for a high temperature lead-free solder replacement for high temperature leaded solder eutectic alloy has been an evolving process as the threat of a regional lead ban became a reality in July 2006. The advantages and disadvantages of lead-free solder in terms of manufacturing, performance and reliability have been increasingly revealed through companies’ Research and Development (R&D), industrial consortia and university researchers. Materials and component design are the primary criteria to focus on the development for the current generation of high temperature lead-free solder alloys. According to the current status of high temperature lead free soldering, there are many unsolved technical problems such as explanation on the lift-off phenomenon, establishment of high temperature lead-free plating technology, construction of a database of physical properties (solder, parts, PCBs), standardization of high temperature solder materials evaluation technology, and most impor...

Research paper thumbnail of Bismuth-argentum alloys as alternative high temperature lead-free solder

Solder reaction is one of the oldest metallurgical processes for joining metal parts. Today, the ... more Solder reaction is one of the oldest metallurgical processes for joining metal parts. Today, the use of solder in modern microelectronic technology is ubiquitous. Lead solder has been widely used in the semiconductor industry for a long time. However,despite the long term acceptance of lead by human society, lead poisoning is known well health treat. The common types of lead poisoning may be classified as alimentary,neuromotor and encephalic. Although Tin-Lead (Sn-Pb) can be replaced by lead free solder for low temperature applications, but there is no lead free solder available in the market that can replace the high temperature leaded solders. Most of the internal joining such as in first level interconnection flip chip is using 90-95 weight percent of lead. Stated in the RoHS (The Restriction on the Use of Hazardous Substances) regulation, the law gave exemptions to the industry by allowing the use of solder with above 85 weight percent of lead. Despite numerous studies on lead f...

Research paper thumbnail of Bi-Ag as an Alternative High Temperature Solder

The search for a high temperature lead-free solder replacement for high temperature leaded solder... more The search for a high temperature lead-free solder replacement for high temperature leaded solder eutectic alloy has been an evolving process as the threat of a regional lead ban became a reality in July 2006. The advantages and disadvantages of lead-free solder in terms of manufacturing, performance and reliability have been increasingly revealed through companies’ Research and Development (R&D), industrial consortia and university researchers. Materials and component design are the primary criteria to focus on the development for the current generation of high temperature lead-free solder alloys. According to the current status of high temperature lead free soldering, there are many unsolved technical problems such as explanation on the lift-off phenomenon, establishment of high temperature lead-free plating technology, construction of a database of physical properties (solder, parts, PCBs), standardization of high temperature solder materials evaluation technology, and most impor...

Research paper thumbnail of Bismuth-argentum alloys as alternative high temperature lead-free solder

Solder reaction is one of the oldest metallurgical processes for joining metal parts. Today, the ... more Solder reaction is one of the oldest metallurgical processes for joining metal parts. Today, the use of solder in modern microelectronic technology is ubiquitous. Lead solder has been widely used in the semiconductor industry for a long time. However,despite the long term acceptance of lead by human society, lead poisoning is known well health treat. The common types of lead poisoning may be classified as alimentary,neuromotor and encephalic. Although Tin-Lead (Sn-Pb) can be replaced by lead free solder for low temperature applications, but there is no lead free solder available in the market that can replace the high temperature leaded solders. Most of the internal joining such as in first level interconnection flip chip is using 90-95 weight percent of lead. Stated in the RoHS (The Restriction on the Use of Hazardous Substances) regulation, the law gave exemptions to the industry by allowing the use of solder with above 85 weight percent of lead. Despite numerous studies on lead f...

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