Indium Corporation Released Bismuth-Free Solder
The new DFLT low-temperature solder reduces assembly warpage while matching the performance of standard SAC305 alloys.
Updated on Sept. 29, 2026 in Materials Science
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Indium Corporation has introduced a bismuth-free, low-temperature solder at the IMAPS Symposium 2026. This new material is designed to mitigate assembly-level warpage defects using a dual-powder formulation.
Why it matters
By providing an alternative that performs at lower thermal profiles while meeting industry standards, this material supports more delicate board-level assembly and rework processes. It addresses common manufacturing challenges related to component stress during reflow.
The DFLT solder utilizes a dual-powder formulation that achieves peak reflow temperatures as low as 210°C. This formulation provides drop-shock and electromigration resistance that exceeds typical bismuth-tin-silver (BiSnAg) alloys and matches standard SAC305 performance.
The players
Indium Corporation
A global materials supplier specializing in high-performance solders, thermal management materials, and specialty chemicals for the semiconductor and electronics industries.
The details
The solder functions through a dual-powder chemistry that allows for effective bonding at lower temperatures than conventional alternatives. By lowering reflow temperatures—the process of melting solder paste to form electrical joints—the material reduces the thermal expansion strain that often leads to warpage in circuit boards. It is suitable for applications ranging from step soldering to hot-bar assembly and rework.
Timeline
September 29, 2026: The IMAPS Symposium 2026 opened.
The Tech Race
The introduction of DFLT reflects a broader industry shift to replace standard SAC305 alloys with specialized low-temperature options. This development competes directly with existing bismuth-based products by aiming to resolve their traditional weaknesses in drop-shock and electromigration performance.
Manufacturers can begin evaluating this bismuth-free solder for board-level assembly and rework processes immediately. The material is designed for use in existing high-precision soldering workflows that require lower heat to prevent structural defects.
The takeaway
The industry is increasingly prioritizing lower-temperature soldering to protect sensitive components during assembly. Watch for future performance data comparing DFLT across varying high-density electronic assembly applications.
Further reading
Explore the latest developments in bonding and assembly in the Materials Science section.
Source note: This article includes information reported by Metal.
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