Surface Mount Adhesives optimize assembly processes.
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Press Release Summary:
Loctite® Chipbonders® 3609, 3616, 3621, 3627, and 3629 address elevated temperatures of lead-free soldering processes. Loctite 3609 is suited for general-purpose high-speed dispensing, while Loctite 3616 handles high-speed printing, and Loctite 3621 targets dispense jetting. Suited for dispensing and ProFlow printing, Loctite 3629 cures at 120°C instead of 150°C, saving temperature-sensitive components.
Original Press Release:
Lead-free Compatible Surface Mount Adhesives to Optimize High Speed Assembly Processes
Henkel's Chipbonder designed to address the elevated temperatures of lead-free soldering processes
Following a period of extensive lead-free evaluation trials, the electronics group of Henkel has revealed that selected Loctite® Chipbonders® are not only capable of running lead-free, but are designed to optimize lead-free processes, eliminating chip loss and saving components by low temperature curing systems. The trials involved testing a range of Loctite Chipbonder adhesives on 'difficult to bond' components. Using Loctite Chipbonder test boards, the trials employed both lead-free and tin-lead dual wave solder machines using a range of Multicore® fluxes. The results proved that Chipbonders 3609, 3616, 3621, 3627 and 3629 are optimized for lead-free compatibility.
The elevated temperatures of lead-free wave soldering processes reduce the mechanical strength of adhesives. In order to overcome poor hole fill and wetting, the contact time on the solder wave is often increased and the wave shape more turbulent. This has an additional impact on the adhesive's performance. Especially where non VOC-free, means alcohol-based fluxes, are in use the chemical resistance of adhesives used in lead-free processes needs to be significantly higher.
"With the deadline to Go-Lead-free now less than 9 months away, manufacturers around the world are currently optimizing their processes for effective operation in these conditions," comments Matthias Brachmann, Application Engineer Europe, Henkel. "Lead-free is already having a significant impact on a range of materials, including Surface Mount Adhesives (SMA). Ultimately, SMAs need to be able to withstand considerably greater levels of thermal and chemical stress in order to prevent chip loss and component movement. Following Henkel's recent lead-free evaluation trials, the Loctite Chipbonder range is currently being well received by manufacturers managing the transition to lead-free, whilst seeking to maintain optimal high speed assembly processes."
The results of the recent trials showed that Loctite 3609 is ideal for use in general purpose high speed dispensing, boasting a high wet strength and long machine on stencil life. Loctite 3616 was proven to be primed for high speed printing, whilst Loctite 3621 was revealed as being the top-of-the-range choice for dispense jetting. Meanwhile, Loctite 3629 low temperature cure SMA for dispensing and ProFlow printing was shown to reduce manufacturing costs by curing at 120°C instead of 150°C and saving temperature sensitive components at the same time. An additional feature is that Loctite 3629 turns fluorescent when uncured for cure visibility. "In combination, the lead-free compatible Loctite Chipbonder range presents Henkel customers with Surface Mount Adhesives for every manufacturing environment," concludes Matthias Brachmann.
About the electronics group of Henkel
Henkel is one of the world's leading and most progressive providers of qualified, compatible material sets for semiconductor packaging, board level assembly and advanced soldering solutions. Through its Hysol, Loctite and Multicore brands, and its global customer support infrastructure, the electronics group of Henkel delivers world-class materials products, process expertise and total solutions across the board to enable tomorrow's electronic industry.
The Henkel Group operates in three strategic business areas - Home Care, Personal care, and Adhesives, Sealants and Surface Treatments of which the electronics group is part, serving transportation, electronics, aerospace, metal, durable goods, consumer goods, maintenance and repair and packaging industries, and offering a broad range of products for the craftsman and consumer. With brands and advanced technologies, Henkel makes people's lives easier, better, and more beautiful. 50,000 employees work for the Henkel Group worldwide. People in 125 countries around the world trust in brands and technologies from Henkel - "A Brand like a Friend".
Company Contact
Doug Dixon
Henkel
(p) 949-789-2500
E: doug.dixon@us.henkel.com
www.electronics.henkel.com
