Thermally Conductive Dielectric Adhesive For Stacked Die Applications

San Diego, Calif. - Henkel Loctite has introduced QMI 9503, a new dielectric adhesive formulated with a high thermal conductivity filler and collapsible spacers that deliver very uniform bond lines. Developed for stacked die packages, this adhesive can be used to attach integrated circuits and components to advanced substrates used in PBGAs, CSPs, and array packages based on flexible tape and organic laminates. QMI 9503 is especially effective for high speed ASIC and power devices where effective heat dissipation is critical to package performance.

Hydrophobic and stable at high temperatures, QMI 9503 is non-abrasive on polyimide passivation. The adhesive produces void-free bond lines with excellent interfacial adhesion strength to a wide variety of organic and metal surfaces including solder mask, BT, FR, polyimide and Au. A package or device manufactured using QMI 9503 will be highly resistant to delamination and popcorning after multiple exposures to reflow temperatures.

The collapsible spacers formulated into QMI 9503 control bond line thickness to 1.2 mil. The product's thermal conductivity is 0.8 W/mK. QMI 9503 can be cured in-line using Skip-Cure processing in just 10 seconds after the bond line reaches 150 C, or cured in a conventional oven for 15 minutes at 150 C. Skip-Cure processing can take place on wet solder mask without substrate pre-bake. QMI 9503 meets JEDEC Level 3 standards and is qualified to perform in lead-free, 260 C reflow applications.

For more information on QMI 9503, call 858-695-1716 or visit the Loctite Web site at www.loctite.com/electronics.

Since 1997, Henkel Loctite Corporation, formerly Loctite Corporation, headquartered in Düsseldorf, Germany, has been part of the Henkel Group. It operates in markets as diverse as electronics, automotive, aerospace, biomedical and general industry. Henkel is a leader in consumer brands and technologies. The branded business sectors are Laundry & Home Care, Cosmetics/Toiletries and Consumer and Craftsmen Adhesives. Henkel Technologies is the world market leader in Industrial Adhesives and Surface Technologies. The three systems businesses -- Henkel Industrial Adhesives and Sealants, Loctite Engineering Adhesives and Henkel Surface Technologies -- supported by their worldwide presence and strong technology base, are the pillars of Henkel Technologies' success. In Laundry & Home Care and in Cosmetics/Toiletries, Henkel holds a leading position in Europe. "Henkel - A Brand like a Friend": With strong brands and advanced technologies of superior quality and value Henkel makes people's lives easier, better and more beautiful. The company operates in more than 75 countries. In 2002, Henkel Group generated sales of 9.66 billion Euro and an operating profit (EBIT) of 666 million Euro. A total of 46,638 employees work for Henkel on a worldwide basis.