Environmental responsibility is a central issue for electronics manufacturers, with halogen-free processing a key component of eco-conscious operations. Henkel has developed two new halogen-free solder products that satisfy sustainability initiatives while sacrificing nothing in the way of performance. MULTICORE HF200 is a lead-free, zero-halogen solder paste that offers all of the reliability, processability, low voiding performance and humidity resistance of previous-generation products but does so in a zero-halogen formulation. Its performance has been proven in multiple soldering processes including handheld applications. Henkel’s MULTICORE MF390HR halogen-free no-clean flux delivers the high activity required for advanced wave soldering operations. With exceptional through-hole penetration, minimal residues and a sustained performance that enables a broad process window, this flux system has been successfully applied in automotive processes but is also ideal for consumer electronics applications in the handheld (telecommunications) sector.
With the industrial electronics market in mind, Henkel has developed a pair of breakthrough electrically conductive adhesive (ECA) technologies that overcome many of the shortcomings of competitive materials. ABLESTIK ICP-3535M1 is a single component ECA that enables manufacturers to incorporate lower cost tin-terminated components and thus obtain a cost-effective, lead-free, high reliability assembly. The material has excellent electrical and adhesion stability, no bleeding or wicking on miniaturized components and can be cured quickly at low temperature. For automotive applications where both high flexibility and excellent conductivity are required, Henkel has designed the first-ever high-end conductive silicone adhesive technology. In fact, ABLESTIK ICP-4000 has already been qualified and is being used for automotive sensor products where components are bonded to metal leadframes inside plastic housings. Historically, the CTE (coefficient of thermal expansion) mismatch between the metal and the plastic has introduced damaging stress to the device. But, Henkel’s conductive silicone technology is able to absorb this stress, maintain the bond and deliver the electrical interconnect between the component and the leadframe.
Henkel’s comprehensive portfolio of underfills has also been augmented by a new advanced material that meets an unprecedented array of complex and demanding requirements. The new HYSOL product is a halogen free, reworkable epoxy capillary underfill with a high Tg (glass transition temperature). This material is designed for CSP and BGA devices and is particularly well suited for handheld communication and entertainment applications. It cures quickly at moderate temperatures, thus minimizing stress on other components, and when cured provides excellent mechanical stress protection for solder joints. This high-Tg underfill also provides an enhanced thermal cycling performance for small-pitch wafer level chip scale packages (WLCSPs) that is unattainable with low-Tg reworkable underfills. The unique formulation offers superb reworkability while maintaining excellent drop and thermal cycling protection.
All of these latest materials advances will be showcased from Henkel’s stand, 263 in hall 4, at productronica in Munich, Germany, from November 15th to 18th. Technical experts will be on hand to discuss how these innovations can help enable more efficient, high reliability and environmentally sustainable processes. Show delegates are invited to visit Henkel anytime throughout the four-day event.