Optical Encapsulant Gel targets high-brightness LEDs.November 13, 2008 -
Curing to flexible gel for chip sealing and protection of lens-type LED devices, 2-part DOW CORNING® OE-6450 offers stress relief, moisture protection, and UV resistance. Product features penetration value of 45 for impact resistance and refractive index of 1.54 to maximize light transmittance. Gel offers minimal moisture absorption and is compatible with lead-free solder reflow manufacturing processes.
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Original Press release
Dow Corning Corp.
2200 W. Salzburg Rd.
Midland, MI, 48686 0994
USA
Dow Corning Electronics Introduces New Optical Encapsulant Gel for High-Brightness Light-Emitting Diodes
Improved Transparency Gel Formulation Allows Higher LED Light Output Than Traditional Encapsulants
MIDLAND, Mich., Nov. 4 /- Dow Corning Corporation's Electronics group today announced the global availability of DOW CORNING(R) OE-6450, the latest addition to its growing portfolio of optical encapsulants for light-emitting diode (LED) chip sealing and protection. This new two-part formulation, which cures to a flexible gel for use in lens-type LED devices, offers outstanding stress relief, excellent durability, moisture protection, and ultraviolet resistance to maximize light transmittance.
Dow Corning offers a variety of other two-part silicone encapsulants in a wide range of transparency levels, hardnesses and viscosities for different uses and manufacturing processes. Compared with previous offerings, OE-6450 is more resistant to impact because it is softer, with a high penetration value of 45. The new material also provides extremely high light transmittance, with a refractive index of 1.54. Other methyl-type silicone encapsulants on the market today offer significantly less transparency, with refractive indexes of less than 1.42.
Most LEDs are coated with protective encapsulants to prevent electrical and environmental damage, while increasing light output and minimizing heat build-up. Historically, epoxies and other organic materials have been used as encapsulants because of their hardness, transparency and low cost. But inorganic silicone encapsulants are now becoming more widely used as the electronics industry moves toward more powerful, high-brightness LEDs. Silicone encapsulants can withstand higher temperatures than epoxy, and are compatible with lead-free solder reflow manufacturing processes. They also offer high light transmittance and low moisture absorption.
"This new low-modulus encapsulant offers both higher light output and better stress relief than elastomer-type or resin-type silicone formulations," said Billy Han, Dow Corning's global market manager for LED and light management products. "We are pleased to add this unique, high-performance product to Dow Corning's growing line of LED encapsulants."
About Dow Corning
Dow Corning (www.dowcorning.com) provides performance-enhancing solutions to serve the diverse needs of more than 25,000 customers worldwide. A global leader in silicones, silicon-based technology and innovation, Dow Corning offers more than 7,000 products and services through the Dow Corning(R) and XIAMETER(R) brands. Dow Corning is a joint venture equally owned by The Dow Chemical Company (NYSE:DOW) and Corning, Incorporated (NYSE:GLW). More than half of Dow Corning's annual sales are outside the United States.
Web site: http://www.dowcorning.com/
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